I trained like "One Punch Man" For 100 days! This included doing 100 push-ups, 100 squats, 100 sit-ups, and a 10km run EVERY SINGLE DAY..... I ended up changing the routine a little to suit my needs ...
A pushup works your chest, triceps, and shoulders primarily, with some core involvement too. And a basic bodyweight squat hammers every muscle in your legs, focusing mainly on your hamstrings, quads, ...