Doing leg exercises at home is probably a lot easier than you realise. You don't need a leg press machine, or a stair climber, or a squat bar to fire up those lower-body muscles. All you need is your bodyweight, maybe a chair, and the motivation to put some burn in your quads, hamstrings, glutes, calves, and inner thighs. Oh, and this list of no-equipment leg exercises that you can do anywhere, anytime. There are plenty of bodyweight leg exercises you can add to your workout to get stronger.
