Why: “Lunges are great,” says Freytag. “But if you’re just going forward and backward over and over again, you’re not activating all the muscles in your lower body.” This tweak takes the basic lunge to the next level.
How: Stand with your feet slightly farther than hip-width apart. Sit back into a squat, chest lifted and knees just over the tops of your toes. Squeeze your thighs and glutes as you stand back up. Cross your left leg behind your right into a curtsy, then bring the left knee down into a lunge. Stand back.