HOW: Lean against a wall with your back flat against it and your feet out in front of you. Slightly bend your knees and sit into a small squat on the wall. From here, lift your toes up as high as you can. Do this up and down motion for the prescribed amount of reps.
FEEL: You should feel your lower leg and thigh muscles working.
COMPENSATION: Don’t bring your ankles directly under your knees, have them out a bit further to get more ankle motion.