Crunches are the first thing that comes ... together as you point your toes toward the ceiling and form a "V" with your body. Hold for 10 seconds. For a modification, keep the knees bent and ...

Crunches, or V sit-ups ... Do 15 reps, then switch sides and repeat. 13. Tone-It V Hold This move uses fast-twitch muscle fibers, which contract during high-intensity moves and help improve ...