I don't know what "psych up" would really mean (more detail please), but in terms of watching something while you workout I really enjoyed How Heavy Are the Dumbbells You Lift?. It's absurd gym humour and covers lots of workout stuff, very funny. What I generally like about it too is that because it's just absurd about the human body in general all the fan-servicey scenes really don't bother me very much as they're very much in-keeping with the gym/body-improvement thing, and it shows off muscle bound men in sexy ways throughout just as much as the women. Generally a good laugh and definitely targeted at the gym crowd.