HOW: Begin by raising your heels as high as you can and hold while driving your knee towards the stable surface. Use a cushion to pad your knee into the wall. You can decide how much you load the calf by offloading the opposite leg. The more you lean onto the opposite leg the easier the hold becomes, progress into putting a majority of your weight on the leg performing the heel raise.
FEEL: You will feel the calf muscles working with this exercise.
COMPENSATION: Do not let your ankle “roll out”. You should feel even pressure between the inside and outside of the balls of your foot.