Exercise Ball Pikes
Begin with your hands on the floor in pushup position, your back straight and your feet resting on top of a exercise ball.
Use your feet to roll the ball inward toward your chest, raising your hips toward the ceiling into pike position while keeping your legs fully extended.
Roll back out to your starting position and repeat for the desired number of reps.
Single Leg Hamstring Pulls
Lie on your back with your hands at your sides, palms down, and your right leg bent on top of a exercise ball. Extend your left leg toward the ceiling.
Press your right heel into the ball and roll it back and forth in front of you, keeping your left leg extended.
Lower your hips to the floor and repeat. Switch legs.