Precautions: While a wall sit puts less stress on the knees, hips and back, you still want to use caution when performing the exercise. Slide down the wall as far as you feel comfortable. If you experience pain, stop or move your body higher up on the wall. Be sure to keep your weight off your toes. This prevents you from adding stress to your knees.

While this can be a difficult exercise, it is one that is easy to perform in the sense that you can do them anytime, anywhere. If you want to end a workout with this exercise or do it at home on the days you don’t come into AMP, you can do them. They also make an ideal complement to a vigorous cardiovascular exercise as theyfocus on many muscle groups critical to the success of runners.

Done properly, this exercise will help your body reap the rewards of your workout plan that much faster.

(Material for this post was sourced from livestrong.com and sportsmedicine.answers.com.)