I'm a CrossFitter, and These Are the 12 Bodyweight Moves I Do For Strong Abs

Why I do it: This is one of my favorite ab moves because it's so hard! Sometimes I do this holding a dumbbell or medicine ball, but doing it as a bodyweight move is intense enough.

• Begin on your back, with your legs straight and arms raised toward the ceiling.
• Roll up to sitting, focusing on the abs rounding the back. Roll back down to the mat slowly, one vertebra at a time.
• This completes one rep.