Abs are mostly made in the kitchen, but you can help speed the process along by doing high-intensity workouts that burn calories and build muscle. This is one aspect of every CrossFit workout, which is why even though CrossFitters rarely spend time solely working their abs, they have amazingly strong, toned core muscles.
You don't have to belong to a box (CrossFit gym) to get six-pack abs. Here's a CrossFit workout designed by Jade Jenny, CrossFit coach and owner of Champlain Valley CrossFit, that you can do on your own. All you'll need is a jump rope and a sturdy bench or box.
The Workout: complete as many rounds as possible (AMRAP) in 10 minutes