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Old 03-02-2017
Zenturtle Zenturtle is offline
Senior Member
Join Date: Mar 2014
Posts: 1,898

With objective measures I mean knowing how a certain swim stroke translates to a certain efficiency.
Even with the best footage its impossible to precisely say whats right or wrong.
TI assumes a certain style or streamlined position is best, but they cant proove it.
Neither can other swim schools.
So within certain limits we all are moving in an uncertain grey zone where the only tools are speed and relative effort to guide us to our personal optimal stroke.

An uncertainty about the spine bending for example:
The resultant arm force is acting outside the centerline, certainly if you pull on wide tracks.
This steers your vessel to the other side. making it move a bit from side to side.
Bending the spine a bit together with the pulling arm countersteers this effect, naking the upperbody move straight forward instead of slightly sideways.
This slight spine bending happens to also be the natural action to deliver maxinal force with the upperbody. We are talking details, but not beyond perception.
Nobody knows exactly what is optimal.

Last edited by Zenturtle : 03-02-2017 at 07:20 AM.
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