This exercise is similar to the basic crunch and was ranked on the list of the Best and Worse Ab Exercises.
How to Do the Long Arm Crunch
- Lie on your back with your arms over your head with hands clasped and arms close to your ears.
- Keep your knees bent with feet flat on the floor.
- Contract your abs and lift your shoulder blades off the floor.
- Lower and repeat for 12-16 reps.