G'day Matt, Thanks for the detailed explanation and examples and I completely accept your explanation and that I was comparing apples with oranges. In fact I'd belatedly come to that conclusion after receiving a similar email from Niels and had sent a couple of messages to the list to that effect. You won't have received them yet as I know you subscribe to the combined version of Paddlewise, so I'll forward them. The first message acknowledges the validity of the values in your earlier examples. Your further explanation and examples nicely reinforce the point. The 2nd email draws heavily on Niels ideas, your analysis and my 'normalisation' of the potential energy values for: paddling style (i.e one arm at a time lifting the paddle), and for use of crude power averaging. However, it does require the values of arm weight that Niels and I use, which in my case I obtained using a value of 70% of body weight derived from a reference on cadavers available at http://www.ulb.ac.be/medecine/anatemb/biblio/Clauser1969.pdf . Also I was curious as to whether the power you quote includes the power to lift an arm and a paddle or just the power that the blades exercise in propelling the kayak? I appreciate the time you have taken in going through all this. Its making me rethink paddling style for casual low effort paddling as opposed to those occasions when one has to put in significant effort. Although I'm an inveterate 'vertical stroke paddler' I'm very much in favour of letting body type and level of flexibility determine style for the sake of avoiding injury as you and Rob have suggested. All the best, Peter *************************************************************************** PaddleWise Paddling Mailing List - Any opinions or suggestions expressed here are solely those of the writer(s). You must assume the entire responsibility for reliance upon them. All postings copyright the author. Submissions: PaddleWise_at_PaddleWise.net Subscriptions: PaddleWise-request_at_PaddleWise.net Website: http://www.paddlewise.net/ ***************************************************************************
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