The Swiss ball reverse crunch builds strength in the core, particularly through the lower abs. Performing the exercise with a Swiss ball is more difficult than a traditional reverse crunch.
Instructions
Lie on your back with your hands out to your sides while squeezing a Swiss ball in between your feet.
Keeping your legs as straight as possible, lift the ball up and off of the ground. Push the ball towards the sky while curling your lower back off of the floor. Slowly lower to the starting position.
Trainer’s Tips
Avoid overarching your back at the bottom of the movement. When you're at the bottom of the exercise, your lower back shouldn't arch up off the floor.
Keep your legs as straight as possible during the exercise.
