I tend to leave the fitness tips to the trainers, but today I had an experience that might benefit you, especially if you are doing P90X.
The Value of The Warm-Up... Today I did a full fifteen minutes of warm-up before I started my resistance routine. As a non-lover of fitness, I tend to want to "get right to it", but I think that attitude has hastened a couple of injuries.
When it came time to start lifting, I was much stronger than I expected - especially when it came to pull-ups. And my elbow and shoulder issues didn't bother me at all!
The warm up was intense enough that by the end of it, I felt like I was working hard. And by the time I started working out, I got to full intensity much faster.
So if you're like me, you might reconsider. Make sure you are warmed-up well before you "bring it" and not only will your workout be stronger, but you'll avoid injury.