On Scubaboard, people were discussing the reverse frog kick finning technique.
Someone mentioned that the propellant force has the square of velocity so it is important to apply a strong velocity during the propelling phase of the reverse frog kick and a slow one during the 'reload' phase where you bring back the fins in the original position.
Apparently, if you do not do this, you will cancel much of the speed obtained when you are propelling yourself.
So my questions:
is that true that all things being equal, you will get better results if you increase the velocity during the pushing phase and decrease it during the reload phase
I understand that the kinetic energy has the square of velocity in its formula but how does one translate this into the speed/acceleration caused to the diver when propelling yourself ? (maybe I am totally wrong and this would require some other equation)
Video of someone performing a reverse frog kick (also called back kick): link
TDI/SDI page about the finning techniques, bottom of the page has an explanation for reverse/back kick.
EDIT: tried to make the question clearer, added a link