HOW: Begin in a standing position with your feet about hip-width apart, no more than a foot away from the wall, and your back supported on the wall. Next focus on lowering yourself down as far as you feel comfortable, then pull yourself up by using your thigh muscles. Make sure to keep your back on the wall for the entirety of this exercise. The further you bring your feet away from the wall, the more challenging this exercise will be.
FEEL: You will the muscles in the front of your thigh working with this exercise.
COMPENSATION: Avoiding rounding at the back as you lower yourself on the wall. Maintain a straight back as you lower yourself.