I'm not normally one for tennis gadgets and "get great quick" schemes, so I'm always a bit skeptical of any tennis gear that Jack Kramer himself wouldn't use. You can call me a traditionalist. So, when the guys at ProTrainer Tennis asked me to demo their new WinSock, I didn't get my hopes up.
After reading the instructions (you know how men never read instructions until we have to), for the next match I warmed up with the WinSock on and immediately got results. I used it for the first 6 or 7 minutes of the hit, and then slipped it off to finish my warm-up. My arm was relaxed and my hitting motion was fluid. If you're like me, it takes you a few games to really get cooking. Not this time. I was hitting clean from the first point. I didn't have to fight my way back into the set; My opponent found himself in that position. I've used the WinSock in every warm-up since. It is excellent for my groundies. I get some funny looks from some opponents, but by the end of the match, they often ask where to get one for themselves.