7 Things You Should Do Before Every Workout

"Dehydration is not good for you," says Mosher. "It decreases blood volume, decreases elasticity of connective tissue, and increases the risk of cramping. You should have some sort of water with you at all times." Mosher recommends drinking your body weight in ounces of water a day as a good place to start when it comes to figuring out how much you should consume on a regular basis. "If you exercise a lot, then that number will go up, but it's a great starting point."