Wall sit

Wall sit
© Healthwise, Incorporated. This exercise strengthens your back, trunk, and thigh muscles, helping you maintain a healthy lower back. Stand with your back 10 in. (25 cm) to 12 in. (32 cm) away from a wall. Lean into the wall until your back is flat against it. Slowly slide down until your knees are slightly bent, pressing your lower back into the wall. Hold for a count of 10, then slide back up the wall. Repeat 10 times. From MSN Health Original article and pictures take http://maintainbodyshape.blogspot.ca/2008_04_01_archive.html site