Check out my video, yoga for swimmers which covers some of the great postures that can really help improve your strength and conditioning if you are a front crawler! Yoga is perfect for swimmers, my own experience of a regular yoga practice has vastly improved my technique. It is only a 30 min video and I don't get to cover off breath work which is just as beneficial. I'm looking forward to getting back into triathlons and the open water this year. Yoga is a big part of my training and if you are looking for marginal gains, you should consider yoga!
See some of my other sport shorts on the channel and I will post more in the coming months. If your sport isn't yet covered, please drop me a line.