Butterfly stoke

Former Member
Former Member
Hey i am intermediate swimmer not long time i started to done the 50m pool using butterfly stroke, but at the end of 50m i feel tired , isn't cause bad technique or it's normal thing . other question too, confused about where the move comes from, from hip? or the tights? if i up and down hip i be in my place , using the tights i go forward. so what really is? thanks