http://www.youtube.com/watch?v=LpxEKWVv3gA
Strength training without stretching can easily lead to muscle tightness. There's a lot of shoulder loosening up exercises that you can do before your boxing/strength training. Check out Scrap's stretch program, there are several good stretches using a fit ball and broom stick that doesn't take much time to do. I think that having a comprehensive stretch routine that you do a few times each week will have the most benefit.
By the way, if you're still interested in that back uppercut, be sure to stretch the back of your shoulder as well as your chest. I suppose you'd want to try it on them when they're leaning up against your left shoulder, as it'd be very surprising because they don't expect to get hit with anything, then be sure to follow up with something to take advantage of the moment of their disbelief.![]()
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