Body position on Butterfly

This video from Go Swim! compiles a lot of short snipets at great swimmers performing the fly, during the hand entry phase. They reffer to it as keeping the hands soft at entry, wich is one way to look at it. I especially like the video because it gives great shots at the body position during this phase. Many swimmers tend to enter the water with a 'dive', which drives their hands down and never allows them to get the stretch of the lats, prior to the pull. On the video, you can see how all the swimmers shown press their chest and head into the water, while keeping their hands high in the water, which causes the arms, and especially the lats muscles, to stretch prior to the pull, generating a much more power full pull, due to the use of elastic energy, or the strech-shortening-cycle.