I was talking to someone the other day about doing weights on machines versus free weights. It lead to a discussion about that one machine where you lay on your stomach and push the weight up with your foot. I can't remember what it's called. It's supposed to target your glutes. I've always kind of thought it was a pointless movement but he said that he did it when he was into swimming since it would help with that. Does anyone think performing that exercise would help with one's swimming ability?