I was going to ask the same question for you guys:
When I do heavy workouts (weights), some days - more than others, the muscles I'm working out (particularly arms, chest). Therefore, I'm not able to workout to my FULL potential and it frustrates me! I REALLY am wanting to have each workout to be beneficial and able to do all that I can do (like anyone). I do get plenty of rest. And even last night, I had not worked out my triceps for a week, due to a bad bruise that was trying to heal.
Any suggestions as to what might cause these cramps? Or better yet, how I can avoid them to the best of my ability? I will watch my intake of water (even though normally I'm pretty good about that). And I do take at least 5g of L-Glutamine per day.