- Crunches target the upper abdominal muscles and reduce the risk to the back and neck. Lie on the floor with your knees bent and your hands on your ears or crossed across your chest. Bring your shoulders off the floor, but leave your lower back and middle back planted firmly on the floor.
- A butterfly crunch is done much like a basic crunch, but with your legs open, your knees bent and the soles of your feet touching each other. Bring your shoulders off the floor, but leave your lower back and middle back planted firmly on the floor.
- This is similar to the basic crunch, except it is done by raising your arms above your head on the floor and doing a crunch. Bring your shoulders off the floor, but leave your lower and middle back planted firmly on the floor.
- This is performed much like a basic crunch, but with your feet off the floor at a 45 degree angle with your knees bent and your ankles crossed, do not move your legs during this crunch. Bring your shoulders off the floor, but leave your lower and middle back planted firmly on the floor.
- This starts like the tuck crunch, but instead of leaving your legs stationary, pull your knees toward your head as you lift your shoulders off the floor leaving your lower and middle back planted firmly on the floor.











