The stability ball ab rollout is a great exercise if you don't have an ab wheel available. But it's also a good choice if the standard ab rollout is too difficult for you right now.
It's essentially a partial rollout since your body isn't going down as far. You can start with a large ball, move to a smaller one as your core gets stronger, and finally do the ab wheel with the full range of motion.
related posts
Tip: Get Linebacker Strong
Build your shoulders, traps, upper back, and triceps with this brutal exercise. Take a look.
The Best Number of Sets for Getting Stronger
A solid new study determines the best number of sets for building lower-body strength. Hint: You're probably doing way too many. Info here.
Tip: Do Crunches, But Follow This Rule
Many experts consider the crunch unsafe, but it can still be a good ab exercise if you follow a simple rule. Check it out.
Tip: Finish Your Calf Training With This
Hitting your calves hard and not getting results? Before you gripe about genetics, add this to the end of every calf workout.