This post is nothing more than spreading the great work this guy does, I have no affiliation with anything related to the Navy. I apologize if this has already been shared. Any feedback is appreciated.
I swim often at the NAS JAX pool to do swim training with some of the guys wanting to go SEAL. They recommended I check Jeff Nichols and Stew Smith on youtube to better my swimming technique. We would time our 500 yd swim and I dropped my time by 2 min within a week thanks to some tips from those two guys. Very useful information on these channels for BUDS hopefuls.