So as far as Backstroke is concerned, there are three main similarities to Freestyle. The first thing is rotation, all of these strokes require rotation through your longitudinal axis, which the longitudinal axis, is basically the axis that if you were to cut yourself straight through your face all the way straight down through your, your stomach and into your groin, you’d have an arm and a leg on one side and you have an arm and a leg on the other side that axis is your longitude will access, so Freestyle strokes and Backstroke strokes required a swimmer to rotate around that axis within their body, which is why fundamentally they are the same stroke. Also with these strokes on the kick helps with the majority of the propulsion comes from the arms so Freestyle and Backstroke the pull does much more for the body than the legs do, even though the legs still to help. It’s not saying that you should just stop kicking and Freestyle, or you should stop kicking it Backstroke, but just at the end of the day, the weight is carried heavily or comparatively on the arms versus the legs. The last portion of this is the pull goes straight back. Same thing in Freestyle these teach like a S pull or for a while or keyhole pull, that’s not a thing anymore- It’s not faster. Same thing with Backstroke, you put the hand and you get the hand into the catch position and you push straight back past the hips, so there’s really no delay. You know they say that the fastest way to get from distance A to distance B is a straight line, same thing in Freestyle and Backstroke you’re trying to either go forward or backwards here essentially going forward we’re going backward. The easiest way to get there is to go straight so you should push water straight back so you go straight forward.