Try this incredible leg strengthening exercise for a big challenge!

Start by placing the ball against your lower back and the wall. Walk the feet out about 24 inches from the wall at hip to shoulder with apart. Lift on leg from the floor Lower your self on one leg by flexing the thigh until the hip is in line with the knee. Raise your self by extending the leg until the leg is straight. Repeat.

Comments:
Perform this exercise with less range of motion if you are having some difficulty at full range. Make sure you can safely perform this exercise before adding additional weight.