Spice up a basic wall sit with a calf raise (which will work your calves as well as your balance) and a shoulder raise to engage your arm muscles. "Make sure your ankles are directly below your knees," Jardine says, and think about "rolling through the balls of your feet to lift your heels off the mat."
- Stand with your back to the wall. Walk your feet forward about a foot, lowering into a squat with your back pressed against the wall. Aim for your knees and hips to both be bent at about 90 degrees with your feet together. Extend your arms forward at shoulder height, palms facing toward each other. This is your starting position.
- Holding the squat position, raise your arms forward and overhead so they tap the wall, biceps by ears.
- Lower your arms to return to the starting position, then lift your heels off the floor to do a calf raise. Lower your heels to the floor. That's one rep.
- Do 15 reps.