Quote Originally Posted by ninja9578 View Post
I forget what it's called... something like "self resistance."
Actually, it's called dynamic tension, but you summed it up very well. As long as you're familiar with the basic exercises for each muscle group, you can get just as good of a work out as with weights.

And like you said, being able to double up on the body parts (Ex. a reverse pushup works your back , and the forward motion your chest) is a fantastic time saver.