Another thing to remember is that having your guitar strap set low enough to kill ants with your guitar is a first class ticket to a doctor's office and an ace bandage. Not only does it force you to strum and finger chords at unnatural and uncomfortable angles, it also looks.
There is a major difference between cramping and tendinitis and you will know the difference when you feel it. A good way to avoid both is drinking plently of fluids (Sounds stupid, but it's true), warming up, and proper technique.
