I did 100 'sissy' squats every day for one week — here’s what happened to my body I tried this 20-minute legs, glutes and core dumbbell workout — here’s what happened How to do a leg curl ...

4. Leg Press The leg press develops the quadriceps, gluteus maximus, hamstrings, and calf muscles. It builds leg strength and corrects muscle imbalances, such as those in the hamstrings. To do it: Sit ...

There's no magic number for how long your workout should go for muscle and strength gains. Here are the factors that play into how long you should work out.