Off The Floor Ab Exercise #6

6. Standing Crunch

(PHOTO BY ERICKA MCCONNELL)

Why: Like on-the-floor crunches, this move tones the rectus, the muscle group responsible for the six-pack look. 

How: Lunge with right foot in front and left foot about 2 feet behind it, arms overhead. As you straighten right leg, raise left knee toward chest as you bend and pull elbows down toward left knee. Return to start. Switch legs and repeat.










Source:prevention.com/fitness/6-floor-ab-exercises