Leg extensions are one of the most effective exercises for isolating the quadriceps. Unlike compound movements like squats or lunges, the leg extension machine specifically targets the knee joint, ...

a) Lie on your back with knees bent and lift your right leg up to form a 90° angle. b) Pushing down on your left heel, lift your hips up off floor until your body is in a straight line, pause and then ...

Chair exercises for leg strength after 65, 6 no-strain moves from certified trainer Michael Betts, with form cues and sets.