A wall sit, also known as a Roman Chair, is an exercise done to strengthen the quadriceps muscles. The wall sit exercise is a quad burner. This exercise is generally used for building isometric strength and endurance in the quadriceps muscle.
Please learn to squat, its good. If you know nothing about squatting, start at Stumptuous. I had lost this site, but I found it again and love it as much as I used to, so I pinned it. work-it-girl-do-that-thing