Re: [Paddlewise] Leg Power (was an apology to Jim et. al. - )

From: Erik Sprenne <sprenne_at_netnitco.net>
Date: Sat, 26 Jun 1999 15:41:11 -0400
> Michael Daly wrote:
>  
> > Daniel Key wrote:
> 
> > Every flatwater kayaker I have seen pushes with the onside leg.  That
is,
> > they drive with the leg that is on the same side as the stroke.  I have
> > studied quite a few racers and videos of races and I have yet to see an
> > exception.  I believe the idea is to increase the rotation of the torso
by
> > rotating the hips with the legs.  Your legs are generally even more
> > powerful than the back.  The knees are really high to provide a lot of
> > travel for that side of the hip.  When I use the technique I slide
about
> > 4".  This works really well in a sprint kayak with an open flat seat
that
> > the paddler can slide on.  It is less noticable in a snuggly fitted sea
> > kayak, but it does still work.

> 
> Does this mean that you have to "loosen up" the fitting of your sea
> kayak to use the leg power effectively?   I don't get the leg push, to
> be honest.  I've tried it and it seems that I'm so snugly wedged into
> my SK that I get nothing out of it.  All I'm doing is pushing my backside
> tighter into the back of the seat.
> 

I'm not that familiar with sprint boating, so perhaps the outfitting 
in those boats allows the paddler to move fore and aft while 
paddling, but I'd think that having your butt sliding fore and aft 
would reduce the efficiency of the stroke.  Being snug in your 
boat ('wearing' your boat) allows for the most efficient energy 
transfer, as no energy is lost in the fore and aft movement of a 
fair amount of weight (your body).  

Some things to consider in the forward stroke:
1.  Be sure to plant the blade completely in the water.  To 
efficiently transfer your stroke energy into forward motion, 
you want to minimize the slippage of the paddle through the 
water when applying force.  There will always be a little 
slippage, but it is minimized with the blade being completely 
immersed.  
2.  To more efficiently transfer the energy to the boat, it's best 
to 'push' with the foot on the side of the stroke.  The foot push 
helps translate the backward pull of the stroke into forward motion 
of the boat.  While the pull of the stroke and the push of the foot 
appear to be opposite forces, they are acting in tandem to propel 
the boat forward.  If the paddler fits snugly in the boat, maximum 
energy is transferred from the stroke into forward motion (at least 
for whitewater boats and sea kayaks).
3.  If the foot opposite the stroke side is used to push forward, a
twisting motion is imparted to the boat, because the increased 
separation of the 'opposite' forces introduces a stronger lever arm 
action, which causes the boat to turn.  This turning moment/force is 
not as noticeable in a sea kayak as it is in a whitewater boat. 
4.  Daniel, Richard, and Matt are correct in stating that pushing 
forward with the onside (same side as stroke) foot makes it easier 
to employ torso rotation in the stroke.  If paddling on the right side, 
pushing with the right foot 'immobilizes' the right side of the body, 
and lets the left side of the body (including a slight movement of the 
left hip) rotate forward in the torso rotation.  If torso rotation is used 
(pushing forward - or 'punching out' - with the left arm while pulling 
with the right arm), more muscles are used in the forward stroke.  
 reduces the load on any single muscle or small group of muscles, 
thereby enabling one to paddle longer and stronger before 
becoming fatigued.  
Most beginners paddle with only their arms and tire quickly.  
Involving the whole upper body spreads the work load over 
more muscles.  Adding the legs into the equation further spreads 
the load to _most_  of the large muscles in the body, and allows 
for much more comfortable all-day paddling.  (I also don't paddle 
a boat with a rudder, and the one time I tried it, it felt funny to me 
becuase of the lack of firm foot support.)
  
This is what I teach as an ACA Whitewater Kayak Instructor Trainer.  
I, too, have run across ACA instructors that teach pushing with the 
foot  opposite the stroke side.  The ACA Canoeing and Kayaking 
Instruction Manual doesn't even address the use of the feet in the 
forward stroke, so this is one of the gray areas in the ACA curriculum.  
Remember that ACA Instructors (and Trainers!) don't always have 
ALL the answers, and don't always do everything the best way.  
The certification program is designed to help ensure that _minimum_ 
standards are met, but there is still lots of room for variation - and 
innovation - from one instructor to another.  Racers and instructors 
can discuss the fine points of paddling for hours on end, because 
their goals are to become faster paddlers and better teachers.  
Each paddler has to determine what works best for her/him and the 
type of paddling that (s)he prefers.  If this sometimes goes contrary 
to "established" beliefs, so be it.  

Play Hard,
Erik Sprenne

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Received on Sat Jun 26 1999 - 13:34:59 PDT

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