How To: Lean back onto the bench onto your elbows, keeping your shoulders down and back throughout the movement. Place your feet on a bosu ball, keeping your legs straight out in front. Lift using your glut muscles, hold for 2 seconds at the top and slowly lower your body back down.
Main Muscles: Glutes
How To: Using a stability ball, lean back onto the ball balancing with your elbows. Bend your left leg at the knee creating a 90 degree angle. Stretch your right leg out straight. Lower your body, bending at the core and lift back up, pause and repeat. Switch legs and repeat.