A lower body workout in under 20 minutes. Do this: 20 reverse lunges 20 calf raises 20 lateral leg raises 20 front leg raises 10 single leg hip hinges per side 20 kickstand squats Horse stance hold for 20 seconds 20 bodyweight squats Why it works: Reverse lunges load the hips and quads with less knee stress than forward lunges. Calf raises build ankle strength and balance, which protect the knees and help prevent falls. Lateral and front leg raises strengthen the hips, a key driver of knee and l