I recently started doing push ups everyday to build muscle. I was only doing 2 or 3 sets of 20 a day. (not many but alot more than I could do when I first started) It seemed to be working because as I kept doing it each day it seemed to get easier and easier, then someone told me not to do push ups everyday because it doesn't give the muscle enough time to heal and if you do it everyday you will gain nothing from it. Does anyone know if this is true or not? If so, then how many push ups should I do and how often?