"Wall sits punish your lower body and core to harness muscle fibers that usually don't get a lot of load," Kendall said. You'll hate us (and this move) less when you see the results.
- Stand with your back flat against a wall and your feet shoulder-width apart.
- Slowly slide down the wall to what would look like a seated position if you had a chair under you.
- Hold this position for as long as you can.