Target area(s): glutes, quads, hamstrings and abs
How to perform a stability ball wall squat:
Stand facing away from a wall with your feet shoulder-width apart. Position your stability ball between your lower back and the wall.
Shift your weight onto your heels, press your back into the ball and begin to bend your knees until your thighs are parallel to the floor, while rolling the ball down the wall. Make sure to contract your abs during the exercise.
Press against ball, and slowly move back to start position.
Complete 3 sets of 12-16 reps, resting for 60 seconds in between each set.