WWR manual chapter 6

6 Forward Kayak Technique


The aim of good forward technique is to propel the boat forwards in as straight a line as possible whilst utilising as many parts of the body to apply force to drive the boat with as full and long a stroke as possible.

The key concept to understand is that the athlete is not trying to pull the blade towards them, but is actually trying to lever themselves and their boat past a static blade in the water.

6.1 The Basic Stroke

6.1.1    Reach and Extension

A good stroke will be as long as possible to give the athlete as much leverage time as possible. A stroke can only be long if the athlete reaches and extends as far forward as possible.

Firstly, simply reach forwards with the hand and a straight arm. Secondly reach further by extending the shoulder. Finally extend further still with the back by rotating from the waist and hips by using the legs. The stroke side knee will be lifted slightly and moved forwards. The ‘off side’ leg will be straightened thus rotating the pelvis in the seat.

6.1.2    Catch

Once fully extended, the next stage is to enter the blade in the water, the catch. The catch is very important. The aim is to develop a large inertia which allows the blade to stand still in the water and hence allow the athlete to lever past it. A lot of force should be applied as the blade hits the water. Though the action should be very forceful, it should also be smooth to prevent splash. If too little force is applied the blade will simply slip through the water.
You can do an experiment with your hand in water. Immerse your hand in water. Slowly pull your hand backwards. Feel how your hand slips easily through the water. Now immerse your hand in the water again and pull backwards as hard and fast as possible. You should feel a much greater force pushing back against your hand.

The blade should be presented square to the side of the boat, if the blade is not perpendicular the catch will be weakened.

6.1.3    Rotation from the legs and hips

Rotation from the legs and hips allow for complete extension of the pushing side, but also provide the engine for the pulling side. Powerful leg drive and hip rotation is the trigger for upper body rotation which applies the big shoulder and back muscles as well as stomach and hips. Without proper leg drive the body has nothing to brace against when applying large forces.

As the drive leg extends, the off side knee is lifted up and is driven forwards within the boat, causing the pelvis to rotate in the seat.

6.1.4    Accelerating blade

Having made a powerful catch the aim is to keep applying as much force as possible to retain the blade inertia. This requires an accelerating force throughout the stroke which is usually achieved with increasing and more powerful rotation as the stroke progresses.

6.1.5    Top arm

The top arm provides a vital input to the rotation force being applied. The top arm provides static tension in the first phase of the stroke where the legs and body are unwinding then strongly drive forward and extend in the second phase of the stroke, finishing fully extended and taking the shoulder with it. The top hand should be at about eye level and push through on a level plane with the shoulder and chest pushing behind it. A top hand shooting up into the air instead of staying level is often the first sign of technique breaking down.

6.1.6    Exit

Once the hand comes level with the body, there is very little more the body can do to apply a force to the blade. The focus should now be on reaching and extending for the start of the next stroke on the opposite side. The blade exit should be smooth and clean using a combination of hand, arm and shoulder to release and lift the blade. The hand and arm should come up so that the upper arm is lifted sideways, approximately 85° to the water, and the upper arm prepared to push, approximately 45° to the upper arm. In this position the hand is roughly level with the ear, the elbow slightly below the shoulder level and no tension should be in the shoulder muscles.
 
The top hand should be held back as long as possible to allow a catch position on the other side that is well forward. A common fault is for the top had to ‘get ahead’ and cause a shortened catch position. From this position by the ear the hand and arm are ready for the push-through at eye level (described above) to begin.

6.1.7  Video Analysis

Video analysis of forward technique is vital. It helps an athlete match a feeling to a self-image. If an athlete can see for themselves that their rotation needs to be a little more, they can then relate it to what they feel with their legs, hips and stomach.

A valuable video analysis session is to choose a flat stretch between 250m and 500m long. An athlete will then do 2 or 3 passes in 3 sets. Each pass is timed. Video should be taken so that the boat and paddler are fully visible in the frame and that both ends can be seen to check for run on the boat. If video can be taken from above/in front as well as from the side this is very useful information to check how straight the boat is running.
Video Clip: Cadence technique session

The first set will use a slow stroke rate (70 for Kayak, 50 for Canoe). The aim is for the athlete to go as fast as they can over the stretch but holding the stroke rate at the chosen rate. The athlete should be trying to generate lots of power through good technique. It takes a little practice for an athlete to use such a slow rate, but it does highlight athletes who struggle with timing and power. Because of the slow rate, it is actually easy to see technical flaws with the naked eye, but is even easier when reviewing the video.
The second set will use a medium stroke rate (90 for kayak, 60 for Canoe). Again the aim is for the athlete to go as fast as they can over the stretch but holding the stroke rate at the chosen rate. At this rate an athlete should have better timing and show better power. Generally an athlete will look their best at this rate.
The third set, the athlete goes flat out using the rate they favour for the distance (typically 100-120 for Kayak, 70-90 for Canoe). As fatigue sets in on the last pass, flaws can begin to show themselves, commonly a bent pulling arm or top hand ‘getting ahead’ causing short stroking.

The times taken are useful, particularly if the session involves a number of athletes allowing a relative comparison of times. If an athlete is relatively slower at the slow rates than they were at the high rate, it highlights that their technique perhaps lacks timing and power, which the higher rates have been hiding. Better use of legs and hip rotation can help with timing and power. If an athlete is relatively slower at the high rate, it highlights that there may be breakdown of the technique, perhaps incomplete extension and rotation.

6.2 Power Circles

Power Circles are a way of explaining and breaking down the kayak stroke so that it can be better understood and executed. The theory was developed by Hugarian flatwater coach imre Kemecsey and is used by the national squad and team paddlers. It is recommended that a practical demonstration and tutorial is undertaken before attempting to utilise the power circles to tutoring paddlers, this article providing a useful reference point once the basics of the power circles are understood.

This article was originally written and published by Imre Kemecsey <need permission to recreate>

 

Zen & the art of Kayaking: Power Circles and Tensegrity

by Imre Kemecsey edited by  Rick Eliot

PREFACE:

"It is easy to lead a horse into the river,

But to make him do the back stroke is harder"

My friend told me:

"It's especially difficult becausef

The horse's swimming style is the butterfly, by nature"  

We all know there is no one best method to improve paddling skill. For my athletes I suggest the exercises described in this work. The same exercises are recommended to other athletes who may find them fun, or who like to try new and different ideas. Athletes with a long background of kayaking on different levels will find my methods relatively simple to use.

 

The indoor kayak ergo meter is helpful in learning the forward stroke because it is stable (1).The athlete can paddle without fear of capsize.  Afterwards athletes can paddle on the water repeating the same strokes they performed on the erg. It is easy to "recall the pictures" that were practiced during dry-land warm up or on the kayak - ergo. Mental pictures are an invaluable training aid. They help an athlete connect with the sensations felt while paddling.

 

No matter what age, type of sport background, or branch of kayaking (sprint, marathon, eco - challenge or recreational), it is useful for an athlete to develop a feeling for how the boat and paddle are reacting to the water.  Exercises included in this work, such as the Power Circles, Line of Forces, or paddling drills will help athletes develop this important connection to the water. In my experience, after some practice, athletes realize how important it is to feel the boat-paddle reaction to the water, and to feel the water through the boat. This ability develops only after much practice. In the early stages the sensations and feel for the boat will come and go. This is seen in any kind of practice, dry land, on the water, and during the main paddling program.

 

Coaches are often confused because they can not see what their athletes are practicing or feeling. For example they don't recognize which Power Circles, or Lines of Force are being felt by the athletes. Also the practice skills don't look like they are increasing boat-speed. The coach may feel like an "outsider". However a keen observer will realize that new skills are being practiced by noting that after practice, the athletes are more exhausted from the same training that they have many times before. The fatigue is from using many new movements.    

 

In order to establish better communication the coach needs to teach the athletes to verbalize their muscle sensation. Because words and expressions will be different between athletes daily practice becomes "colorful" and exciting.

 

 

1.         INTRODUCTION

I want to underline that my analysis presented in the "inner structure of the kayak technique" is not scientifically proven.  Instead I call it "my training diary" because it contains extremely subjective views on kayaking techniques that I have collected in nearly 50 years as a competitor and coach. The published exercises, descriptions, mental pictures, and analogies are simply my method of teaching technique.  They include the comments and feedback from many athletes about muscle sensations experienced while paddling. This method of collecting anecdotal evidence is useful to coaches and is frequently used by researchers in the fields of pedagogy and psychology.

 

I find it nearly impossible to scientifically prove the accuracy of my kinesthetic and sensory "discoveries" of efficient technique.  My goal was simply to increase the athlete's awareness of how a kayak reacts as it is propelled through the water.  I want the athlete to "feel the water" through the boat and become aware that boat and paddle are only extensions of the athlete's body. My ultimate aim has always been to find the optimal body position and coordination of body parts to achieve the most powerful and efficient paddling manner possible.

 

I publish my experiences in order to motivate paddlers, coaches, and other professionals to experiment with the sensory approach to technique improvement.  The process starts by writing down known philosophies about the teaching process, paddling skill, and then personal feelings about technique. This process causes coaches and athletes to compare styles and look for subtle differences in individual paddling technique. Eventually, as motion sensitivity develops, athletes discover helpful new images and analogies that they contribute to the growing number of case studies all of which enables other paddlers achieve a more efficient kayaking technique.

 

"Technique" is mentioned many times above. I am not going to define all details of one or two favored techniques or, in spite of being in the kayak sport since 1955, review all approaches to the topic.  My own background is founded on two basic techniques. The first one is the "pure" Hungarian, the other one is the Hansen technique. The latter was "created and presented" by Eric Hansen from Denmark in Rome in 1960.

 

In addition to these two techniques the "wing" paddle appeared which modified and improved paddling technique. Boat speed increased and higher boat speed seems to be making the technique more "uniform". So far this trend in technique is not yet "dominant" in the woman events. In my judgment, this is because of the 10 seconds lower boat speed.

 

 2.         POWER CIRCLES.

The use of Power Circles to teach technique began in the early 70s.  Since then the shape of Power Circles have changed, improving continuously year by year.  For example, originally I thought the support arm has to help the pulling arm. Later, from athletes experience and my observations this view changed.  The new focus was on the timing of the shoulder support, to help the arms.  Then it became obvious the torso was used to support arm motion, and that there was a need for similar support from the legs.  All modifications lead toward a better "visualization" of the "centre" of PCs, and what makes them so effective.

 

It seems to me unnecessary to talk with athletes during practice about the "final forms" of the kayak stroke. Instead I focus on sensory learning methods which will help all, sprinters, marathon, recreation, and eco-challenge athletes.

 

The Five Power Circles :  This is the starting point, the first level, in my system.

           

Power Circle #1:         

This circle is initiated from the pulling side foot pushing against the foot-board. The reacting force (from foot-board to foot) is transferred toward the stroke-side hip. The stroke-side hip pushes against the seat. From the seat the motion is transferred up the torso to the "locked" stroke-side shoulder, and then to the stroke side hand which pulls against the paddle. Pulling force from the hand coupled with lower body tension and pressure on the foot-board acts to propel the boat forward. This circle becomes complete when the force from the stroke-side hand to the paddle is transferred back to the foot pressing on the foot-board. (Dari Fisher). Think of PC #1 as taking place on one side of the body (2).

 

<video of power circle 1>

 

Power Circle #2:         

In this circle the lower hand initiates the compression against the paddle and resulting force is transferred through the arm to the stroke-side shoulder. As the shoulder moves backwards the opposite shoulder moves forwards. Both shoulders work as a unit to transfer force from the lower hand to the upper hand. The shoulders must act in unison, held in a firm position, in order to accomplish an effective transfer of force. The upper hand now pushes against the shaft, which transfers force to the stroke-side hand to complete the circle. (Dari Fisher).  Think of PC #2 as being about Body Rotation (3).

<video of power circle 2>

Power Circle #3:         

The "Powerful Bicycle" is initiated from pressing the foot against the foot-board. The resulting force moves toward the stroke-side hip. The hip is compressing against the seat. These combined forces are transferred to the opposite hip which is important in this power circle. The opposite hip presses sideways against the boat which counteracts the turning effect of the paddle stroke. This helps the boat to run straight. Once the resulting force from the hip compression is transferred back to the stroke-side foot, this circle is complete. (Dari Fisher).  Think of PC #3 as about Leg Work (4).

<video of power circle 3>

Power Circle #4:         

The blade's compression against the water initiates force which is transferred to the stroke-side shoulder. That force is then transferred to the opposite hip. The opposite hip pushes against side of the boat opposite to the stroke-side. The resulting force from the opposite hip is transferred back to the pivot point of the blade in the water to complete this circle. (Dari Fisher). PC #4 is about the Shoulder to Hip Swing (5).

<video of power circle 4>

 

Power Circle #5:         

The final, and most difficult, power circle to master uses the compression of the stroke-side foot against the foot-board to transfer force to the stroke-side hip. The stroke side-hip then pushes against the seat, and the combined forces from the foot and hip are transferred to the opposite pushing side shoulder. This shoulder and arm then compress the hand against the paddle. Force is transferred back to the foot to complete the circle. (Dari Fisher). PC #5 is about the Body Swing and a firm Cross Frame Rod (6).

In the following section each PC is viewed as a sequence of forces. Mental images are given for each PC to help athletes "feel" the flow of forces. The KEYS paragraph focuses attention on the most important elements in the PC. Names, or short description, will remind athletes what each PC is about.

 

<video of power circle 5>

 

Adam van Koeverden 

FORCE FLOW in each Power Circle: This is the second step in my teaching.

 1-THE CATCH, all one side, PC (#1)

Force Flow: Heel a  Leg a Hip a Trunk a Shoulders a Arm & Hand a back

Images: Blade fixed in cement, boat moves past stuck blade, shaft bends, pulling on a stuck door, Tug-of-War pull, pressing side of boat against a water wall (7).

  • HEELS:  Push to support strong Catch
  • HIPS:     Push leg and foot, rotate backwards. Hip and Shoulder work together
  • TRUNK: Body swings away from the shaft to counter blade pulling force
  • ARMS:   Stiff frame with body, arm pulls with torso, upper arm pushes bent shaft 
  •  KEYS: *Lock blade against water cone for split second.*All forces link together to power the stationary, but bending, shaft.*Pull on stuck door with a straight arm. Feel a string is attached to the shaft.

 

*Fix the blade, and then pull the boat past it.

 

2-BODY ROTATION PC (#2)

Force Flow: Arm a Shoulder a other Shoulder a Arm a Shaft a Pulling arm

Images: Stiff carbon rods connecting a four sided frame (8).

  • HEELS: Push on foot rest
  • HIPS:    Rotate hips with torso
  • TRUNK: Keep a stiff 4 sided frame, don't wrinkle the new membrane shirt.
  • ARMS:  Spear fish, bend shaft, pull string, force travels to top hand push 
  •  KEYS: *Keep shaft and chest parallel, arms ridged.* Move boat past fixed blade, use water don't fight it  * Relaxed, light, swinging rhythm, pausing for glide, soft, catlike* Accelerating paddle stroke* Swift blade removal, pause for glide* Lift elbow and spear a fish with blade

 

 

3-LEG WORK PC: (#3) 

Force Flow: Heel push a Hip a other Hip a other Foot a back to 1st Foot

Images: water skier, fish tail, snake, pole vault, water wall, eggshell, bicycle, stiff carbon rods, Rubber Ducky, wet soap,  (9).

  • HEELS:  Push the heel; lift other heel, lean boat.
  • HIPS:     Push back; rotate with trunk, lift other knee, hip thrust against water wall
  • TRUNK: Vigorous swing to other side, other knee lifts high
  • ARMS:   Hands at eye level
  •  KEYS:*body works as a ridged, carbon frame, hip transfers force to other hip *Water wall supports body motion, force rebounds back to squeeze boat forward*Skier and Kayaker feel for the best boat angle against water wall*Body hangs on flexing shaft as trunk rotates and swings hard to side.*Arm holding paddle stretches forward, cross center line, no pull at start*Knee up and toward power side helps body motion to the other side.*Watch Natasa Janics and Larsen use boat tip control and glide.*Plant pole as a fixed support for body weight, force flows to other side

 

*Hip Flick at end of stroke to push on water wall.

 

4-SHOULDER to HIP PC (#4)

Force Flow: Foot a Shoulder a Cross to other Hip a Push vs. Wall a back

Images: Carbon rod transmits forces, Penguin walking on stilts, snake motion, a stiff rectangular frame is transferring force to the boat (10).

  • HEELS:  Starts the sequence of forces
  • HIPS:     Push away from shaft, against water wall to snake boat forward
  • TRUNK: Flexible full swing, ridged frame transfers force across body
  • ARMS:   Keep a stiff framework to transfer force to blade
  •  KEYS:  *See from front or back. Watch the back bend countering stroke force*Hip presses tipped hull against water, rebound squeezes boat ahead*Put equal force on both ends of stiff body framework

 

*This PC connects upper Shoulder PC to lower Legwork PC.

 

5-BODY SWING, Cross Frame Rod PC (#5)

Force Flow: Cross body a Hip a Shoulder a Arm a Hand

Images: wet soap squeezed forward, water wall, fish tail, snake, carbon rods (11).

  • HEELS: Supports hip force going to opposite shoulder
  • HIPS:     Pushes other shoulder forward, cross the body, by stiff carbon rod
  • TRUNK: Strong base for transfer of force from hip to other shoulder
  • ARMS:   Provide ridged frame for force transfer to blade.
  •  KEYS:  * Fish tail force from body swings hip against water wall.* Get an Action - Reaction from the water wall, rebound, use of water.* Force flow pushes shoulder well forward to starts next stroke. * Vigorous torso and back swings toward off side, and against water wall.* Hip presses side of boat against water wall at optimal angle.* Hip flick with good legwork.* Think of a water skier finding best angle of ski pressing against water.

 

* Keep weight leaning on paddle

 

Eirik Larsen at Athens 2004

Power Circle Discussion:

 

According to my observation these PCs are already part of super athlete's technique without consciously learning them. Therefore it is worth the time spent to practice them. They help paddlers reach higher boat speeds in all types of kayaking: sprint, marathon, eco challenge and recreational racing. After a few weeks practicing PCs the subtle parts of the technique will start "finding their place" like pieces in a large puzzle (11).

 

 

I have received very useful comments from all over the world.  One Hungarian doctor bought my book and was able to learn the technique by following the directions in it. He learned to "compresses his boat into the water-wall" and found his kayak is now moving better. He is paddling a NELO, with swivel seat. And, since he is using kemecsey technique, frequently "hits the limit" of rotation with this seat. Just like the book proscribes, he coordinates rotating the torso and leaning the boat to produce powerful strokes. He is very pleased with the methods and his paddling progress.

 

One of the most important things Power Circles can teach us is a strong trunk rotation that enables athletes to "lead their boat" through the water much like a wind surfer or water skier.  (Further on I am going to explain the details with suggestions about using this exercises. There will be pictures to show how the Line of Force is transferred through the trunk from the paddle to the boat.)

 

Often it is useful to reverse an image.  For example think about starting from the water and following the line of force to paddle, hand, arm, and to the boat.  No matter which way you trace the lines of force, PCs will help athletes develop a firm body structure which maximizes the transfer of power in each paddle stroke.

 

I want to emphasize again that I do not have a new technique.  Nor are my methods the only way to teach technique, or to learn it on your own.  Rather the motions described here are the natural adaptations being made by talented athletes in today's high racing speed.  My goal has been to continuously follow the process of evolution in kayaking technique and, with the help of ideas from world class paddlers, teach it to my athletes.

 

Numerous comments and feed-back from athletes are my "proofs". Like this comment: "one thing is for sure: your technique coaching makes the paddling motion a lot more fluid and efficient. The full body motion - with all parts contributing in a coordinating chain - makes it enjoyable. The rhythm and swinging motion are very recreational. There ought to be some way to set it to music" (12).

 

This is a wonderful recognition from an athlete. It is a good "reason" to teach technique in this way. In my opinion it is one of the most effective methods to teach the efficient, economical movements in modern kayaking.

3.         BOAT & WATER

The reaction of the water to boat movement is obvious. We can find many papers, studies or essays about the horizontal rocking and bouncing motions of the boat. The motion is very similar to a playground seesaw. In addition, because Kayaking is a two blade cyclical motion, the kayak will develop a left to right sideway motion like a snake.

 

Take them one by one. First is the rocking motion of the boat, the side leaning or tipping of the boat. The challenge is finding the best position between paddle and water, and between boat and water. The most comfortable, as well as the most efficient, position is to lean the boat towards the pulling side.  This motion starts gradually at the end of the recovery phase. At this moment our boat is completing a stroke and is still leaning towards that side. As we start to change paddling sides, the boat leans toward the locked blade at new catch position. We can observe this on video clips and still photos of the super athletes.

 

We can observe the opposite as well, a boat leaning away from the pushing side during power phase. This is a common way to loose power and control of the boat. The "inner structure of the kayak technique" has been loosened up. The connection between the blade in the water and the water in front and beside the boat on the opposite side is getting weak.

 

The proper leaning of the boat:  This is the third step in my plan.

 

Let's see some video clip of the greats. I highly recommend observing video clips of Knut Holmann (13), Akos Vereczkei (14), Eirik Veraas Larsen (15), Adam van Koeverden (16)& Natasha Janic (17).  Use pictures taken from the front, a few strokes are enough. Watch each video a minimum of 10 -20 times. Focus on the horizontal movements, and rocking motion of the boat. Then watch the leaning of the boat to the pulling side. I suggest watching these athletes because they are working together with the boat in a perfect harmony. We should memorize their rhythm, which is like a symphony, the symphony of kayaking. (18).

 

Feel the water supporting the hull. The hull uses that it to provide a solid base of support for the powerful motions used in a good paddling technique.

 

Now look for the swinging motion of the trunk to the opposite side from the paddle (19).  At this point the boat is leaning towards the blade which is locked in the water (20). On the opposite side of the boat the "water wall" supports the force of the swinging trunk. (21).

 

Next watch the position of the shoulders (22). The shoulder on the support side moves as if locked to the hip on the pulling side (23). Because we cannot see this muscle action we need to feel it during our own practice on water or on a kayak erg. (A paddling erg is particularly helpful for any "outsiders", coaches, professional helpers, or research scientists.)

 

Watch front view videos of the superstars 20 times or more. Slow the motion down, speed it up.  Notice that the height of the power side shoulder is correlated to the leaning of the boat toward the pulling side (24). If the shoulder moves too high (even 2-3 mm) the athlete will be unable to lean the boat to the paddle side. Without that lean there won't be sufficient support from the boat and water to swing their trunk to the support side (25). 

 

The position of the shoulder on the pulling side determines both the quality of the power stroke and the compression on the water-wall beside the hull on the support side.

 

Good athletes will be able to watch the video a few times and discover the "connection" between the heights of the pulling side shoulder and the "rising up" side of the boat on the support side.

 

At this moment we have two diagonal Lines of Forces: one is "moving" from the shoulder on the support side into the hip on the pulling side (26). The other one is coming from the shoulder on the pulling side and "going" across the body to the hip on the support side (27). The two lines of force diagonally cross each other somewhere in the "middle of the trunk" (28).

 

Here is a valuable discovery: the bouncing motion of the boat will disappear when the athlete is using the water-wall. This is done by compressing the boat into the water on the side opposite to the blade (29). The "snake-motion" of the boat will disappear if there is good compression against the water-wall.

 

4.         LEGWORK        The legwork is the forth step in my teaching progression.

 

The technique of leaning or "edging" a kayak appeared more than 10 years ago in the technique of super athletes. When I first saw this rocking motion I was confused, not able to understand or explain it. The first step was to talk with my former elite athletes about the new "phenomenon". We recalled past conversations about pushing against the water-wall, and then we watched video and studied paddling on the Kayak ergo. At first we had limited knowledge about legwork because the legs are usually covered by a splash-cover (spray-deck). But on the kayak-ergo the legs are not covered which helped us. 

 

We were lucky that Zoltan Bako, Knut Holmann's coach, had video that we could watch thousands of times. Slowly we "discovered" the secrets of Holmann's legwork: he used his legs very powerfully up & down (30). We called it "bicycle motion" and he never decreased this bicycle motion during the race. Then we observed another important detail, his support side knee was moving above his pulling side knee. I saw something else in this "knee movement".  His support leg knee "covered" the other knee (31). At the same time the heel of the support side leg is raised from the foot board while the heel of the pulling side leg is pressed against the foot board.

 

Athletes, coaches and other experts were talking about a perfect "equilibrium" in Holman's technique. Others called it a "well balanced" motion. Actually they were very close to each other. Personally, I like both of them but knew I was missing something.

 

I still didn't understand why the athletes were "edging" the boat. To study it we invented an exercise called A.B.S. (Anti-lock Break System). The athletes were asked to "visualize" four points, the two heels and the two hip joints, and focus on the movements of each. These were the four points where the athlete contacted to the bottom of the hull. I asked the athletes to modify the horizontal position and the longitudinal direction angles of the boat.  They were to use these movements to find the best support from the water through the boat to the paddler. (We were looking at the base of good technique.)  Without exception, during these tests, all the athletes leaned the boat to the pulling side. It turned out there is a strong correlation between the swinging motion of the trunk & the boat leaning.

 

The water-skier, skier, or wind-surfer all use edging to control forward motion.  Of course they get propulsion from the motor boat, momentum, or from the wind while Kayakers generate their own power. But both use their equipment to press against the water wall to control their direction (32).

 

We have to watch again the video clips of Akos Vereczkei, Eirik Veraas Larsen, Knut Holmann, Natasha Janic. They may not be aware at that they move their boats sideways against a water wall. However it is obvious that they are rotating and swinging their trunk like a punching bag. This swinging motion sends more power to the blade than trunk rotation which is produced by abdominal muscle power (33). 

 

 As the athlete is swinging, it produces sideways motion of the boat (34). The talented athletes automatically will modify the position of their boat in a natural way. They are edging their boat, because this is the best position of the boat to transfer the power from the blade through the hull to the water. Edging is also the best way to transfer momentum from swinging body weight into boat speed.  We concluded that an edging position is essential to support the whole technique. It makes good use of the water by not fighting against it.

 

My final conclusion is that the two Lines of Forces in the athlete's body are leading the boat (35). They are directing, regulating the edging movement, longitudinal direction and compression of the hull into the water-wall. It is similar to edging by a snow skier, water skier or wind-surfer.

 

5.         LINE OF FORCES  The Line of Forces in PCs are the fifth step.

 

Each Power Circle consists of a sequence of forces which are repeated every paddle stroke. There are usually two or three lines of force in each PC.

 

For example in PC #1 a force sequence flows along the following Force Line: (1) heel push and stretching out of the leg, to (2) the hip and gluteus muscles, up to (3) the shoulder on the pulling side, to pulling arm, and finally to the hand. Then the cycle repeats during the next stroke (36).

 

The Line of Forces runs through the torso to connect the upper to the lower body. The lower body is supported by the water through the boat. Power is transferred from the locked blade in the water to the athlete's torso. It is utilizing the two Lines of Forces, LF #4 & LF #5.

 

In PC #2 forces are working in a different way. PC #2 starts with the hand on the shaft. It moves along the (1) arm on the pulling side into the (2) shoulder. From the shoulder on the pulling side force travels to the (3) shoulder on the support side, then along the support side arm into the hand. In this Force Line we are working with the shoulder on the pulling side to the shoulder on the support side (37). This LF crosses the body to produce a 3D structure technique.

 

PC #3 starts at the footrest and moves to the (1) pushing leg. In the second part of PC #3, force flows from the (2) hip on the power side to the (3) hip on the support side.  Picture it as a giant triangle with force flowing from the gluteus on one side to the gluteus on the other side (38).

 

PC #4 can also be pictured in 3D.  It starts at the blade in the water and moves up to the (1) shoulder on the pulling side. The second LF in PC #4 starts in the  shoulder and goes down to the (2) gluteus muscles on the support side. The most important part of the PC #4 takes place between the shoulder on the pulling side and the hip muscles on the support side (39).

 

PC #5 forces goes from (1) footrest through the straightening leg to the seat. The second part of the PC is moving across the torso from the (2) hip up to the  shoulder on the support side. Force travels from the shoulder along the (3) support arm into the hand on the shaft.  Both PC #4 and #5 LF use the torso which is important in controlling hull edging.  Strong torso forces compress the hull into the water wall on the support side and regulate the leaning of the boat on the pulling side (40).

 

In this first part of my work I have focused on the LFs in the torso. We have been analyzing the function of the LFs: their direction, modification and adaptation during each Power Circle.  

 

6.         BENDING & DIRECTING THE LFs. This is the sixth step

 

All of the five LFs in the torso contribute to correct body posture (41).  They also have other benefits, which I once underestimated. One important result of good torso motion is that the boat will use LFs, to increase water support in front and beside the hull. We are immersed in water and need to learn how to use it effectively. Watch a salmon or trout use the water while swimming up a fast water-fall. They generate all their power just by moving from side to side. Did you know that a Barracuda uses the water so effectively that he can accelerate from zero to 100 km/hour in less than a half second?  We need to learn how to use the water-wall effectively and not let the boat be fighting against it.

 

Another important role of the LFs is how they affect the torso. They have a significant function in building up a firm "internal technique" structure. In my view, the effective use of torso LFs is the only way to transfer full power from the blade to the boat, so generating maximum speed.

 

Next let's look at the whole movement system to see what forces affect it. This system includes:  boat ? water ? athlete's body ? paddle.  The job of a coach is to apply knowledge of an efficient system to help athletes coordinate their movements and generate power by use of force lines. Good instruction will enable athletes to create a firm, effective, and economical technique. This is best accomplished by focusing on the "inner structure of the kayak technique".   

 

I think the "Tensegrity" principle will help us understand it.  This principle occurred to me when I was thinking about the numerous "compression - tension" pairs in paddling technique. I recognized that "compression will awake a tension" and that this connection is very similar to Newton's third law.  My athletes, other coaches, and I started to talk about these observations. We collected a lot of ideas, took notes, and continuously modified our ideas. This became a never ending process as we corrected, and modified our ideas in the development of the Tensegrity theory.

 

Koeverden and Larsen overlayed

 

The following are some of our conclusions about the inner workings of technique:

(These require a thorough understanding of Force Lines to be well understood.)

 

In PC#1, the shape of the LF through the torso is changed when it is acted on by forces coming from different directions.  The leg on the paddle side pushes on the footrest as the hip rotates back. This motion acts on the torso to bend the lower part of the LF backwards. This causes the upper torso to bend backwards (42).

 

The first part of the PC #4, from the blade up to the shoulder, is bending the upper part of the LF in the torso backwards (43).

 

Next think about the LF of PC #2 in the torso area. This LF is moving from the shoulder on the pulling side to the shoulder on the support side. The end of the LF on the pulling side is bending backwards because of the compression from the first part of the PC #4. The other end of the LF on the support side is bending backwards. The support arm is compressing in that direction from the bending shaft. This bending shaft is compressing the whole support arm backwards (44).

 

The PC #3 has three LFs, but only one is of interest to us in this work. It is the LF in the torso, between the gluteus muscles on the pulling side and the gluteus muscles on the support side. The pulling side end of this LF is being bent backwards, because the straitening leg is pushing back toward the gluteus muscles. The support side end of the LF is flexing backwards, because of the water resistance is holding it back (45).

 So far we have 3 LFs in the torso and both of ends are bending backwards.

PCs #4 & #5 also modify their shape, under the effect of the external and internal forces. The compression and tension pairs are deforming the shape of the PCs.

 

PC #4 LF in the torso is moving down from the pulling side shoulder into the opposite side gluteus muscles. The first LF in PC #4 is coming up from the blade in the water to the shoulder on the pulling side. This LF bends the LF in the upper part in the torso and shoulder. The other end of the LF in the gluteus muscles on the opposite side is bending because of the resistance of the water (46).

 

PC #5 LF in the torso is coming from the gluteus muscles on the pulling side and moves up to the shoulder on the opposite side. The LF in the support side shoulder is bending backwards, because bent shaft is compressing the support arm backwards (47). 

 

7.         HULA HOOP is the seventh step in our learning sequence.

 

Obviously the work of the arms is very important.  We look at arm work as being either pulling or pushing movements.  Actually the work of the arms is much more complicated. For example the arms flex the shaft of the paddle at the catch and during the power phase.  According to our tensegrity theory, the support arm is prying the shaft forward and slightly downwards. This movement generates tension in the entire length of the paddle. The tension is "moving" along the support arm into both of the shoulders. The elbows moving downwards together with firmly held arms and circular body rotation bring to mind a bent "hula-hoop" ring. All these compressions-tensions are perfectly supported by the LFs in the torso, because of the LFs are flexed a bit backwards.

 

From the above discussion we understand these topics:

  1. the bending hula - hoop, caused by the pulling-pushing arms, and elbows (48).
  2. a tension in the bending shaft (49).
  3. this tension is moving further through the arm (50).
  4. then to the shoulders and towards on the LFs in the torso, which is responsible to "keep up" the flexing shape of the hula - hoop (51). 
  5. the LFs are tensed in the torso and LFs are transferring the tension (52).
  6. into the boat through the gluteus muscles and legs (53).
  7. this tension in the boat is pushing the boat into the water-wall, around the boat (54).
  8. the friction of the water - wall is compressing, prying the whole system forwards through the water (55).

 

TWO POWER EXERTION  (This section takes the place of a summary.)

 

Usually we think of power moving from the bending shaft through the arms-torso-legs-boat to the water wall. The bending shaft starts the compression through the athlete's body and ends by pushing into the water-wall (56).

 In Reverse Order:

However force also flows in the opposite order: from the water-wall->boat-> legs-> torso-> arms and the bending shaft (57).

 In Reverse direction:

The compressed water also exerts force back to the athlete's body causing the paddle shaft to bend (58).

 Combined together the system: ? water ? kayak ? athlete's legs, arms, torso ? paddle will create a balance (equilibrium) between compressions and tension forces. This balance of forces often develops automatically in the most talented athletes. We can also teach it, at least up to a certain level. This equilibrium is easy to see when watching paddlers from the front. It brings to mind a stretched out frame structure like an umbrella (59). This structure is creating a "dome-like" formation, with the starting point being the blade in the water. The Power Circles are like a "spider web" stretched all around the athlete's body. Literally this web is the inner structure of the kayak technique.

 

6.4 Wash Hanging

Wash hanging is the art of using the side or stern wash (or wake) of a boat to assist speed. This allows a paddler to move at the same rate as the lead paddler with considerably less effort (for the skilled paddler). From a single boat there are 3 washes which can be ridden by another boat

left and right side washes – where the bow of the boat riding the wash will typically be around  the same level as the cockpit of the lead boat. This is the most effective wash, and is the wash favoured by flatwater paddlers – however it is the more difficult wash to sit on in a river boat as it causes the boat to steer towards the lead boat. Ensure that the paddler sits far enough out so that the lead paddler does not catch their paddle on the bow of the boat.

Stern wash –  directly astern, a smaller wash than the side, but an easier to sit on. This is the typical wash that would be used in a team event as it allows the paddler to follow the same line and does not affect the steering as much as the side wash.

6.5 Sitting on side wash

To sit on a side wash and paddle effectively requires the paddler to continue to use their leg drive and powerful body rotation. To do this, use the ‘drop hip’ form of steering where the paddler will sit heavy on one side of the seat causing the boat to turn. This will allow the leg drive to be used. To provide additional assistance it may be necessary to offset the feet in the boat – so move the foot nearest the lead paddler to the side of the boat and move the outer foot over to match normal foot position. This will then increase the turn effect of the nearside leg drive and assist in keeping the boat straight.

The paddle stroke will be slightly leant over, but should be easier than paddling in the lead at the same pace. Ensure that the nearside paddle stroke is fully extended to make sure the bow is kept away from the lead paddler.

This will take practice, but paddling in a group environment is great exercise for lean control and core stability workouts. It’s also great fun to be able to take part in group races!

6.6 Standard wash formations



 
stdwash1.gif
 stdwash2.gif  stdwash3.gif
  Standard 2 or 3 boat on side wash
 4 boat formation – 2  side wash and one in the ‘V’ wash at the back. Rear V wash is a very easy surf wash  Alternate 3 boat formation. Where there is a weaker 3rd boat, and two well matched lead boats the 3rd boat will stay in the ‘Half –V’. It is them easy to switch washes without having to cross around the back of the boats.