Side Wall Slide
Works: Legs, butt, and core
A. Place a stability ball against a wall and lean left side against it, feet together and weight on right leg. Raise left arm to chest height in front of you, palm facing ground, and place right hand on hip.
B. Step left foot at a diagonal behind you as you bend right knee. Press against ball as you return to starting position; repeat. Do 12 to 15 reps; switch sides to complete set.