Definetly. A few years back, I started doing push-ups, every day, for months. After a long period, the routine was changed to a day on and a day off, and BAM, all of a sudden I could do more and my muscles looked better. If I’m not mistaken, day on/off is the recommend frequency for push-ups. Correct me on this if I’m wrong. The problem, for me, of doing two days in a row, is that my penis just doesn’t look or feel that good the day after. If you felt muscle pain in your arm, would you exercize it ? Two rest days definetly heals it better.