I got in the pool yesterday and did a straight 1000 then about 1200 worth of drills and I thought my stroke was feeling really good. By the end I was getting some bad chafing under my armpit where my lats rub on the inside of my arm. And no, I'm not muscle bound, so that isn't the problem (5'8" - 140). Anyone else have this? I have had this problem before in races. Should I work on my stroke (I dont know where) or just put on some body glide?