The performance and physics of the fish kick 11 years ago
I don't feel like current competitive trends is evidence against this new technique.
Indeed it is not, because i've been Fish Kicking since the 1980s when i was a swimmer in college. It isn't anything new. If you watched swimming competitions earlier than the 1980s you'd see Fish Kicking swimmers in freestyle and backstroke competitions, too.
It isn't anything new.
And it isn't as effective as other strokes because humans need to breathe while they swim. Fish Kicking is done submerged.