The twelfth in a series by Scot Willingham.

@##=#<1,R>@##=#12 Single leg Tabletop Crunch on Ball

Muscles worked
Primary: Abdominals (all of them, emphasis on the obliques)
Secondary: erector spinae
Equipment: Swiss ball

You should be draped over the ball stretching your lower back. Stay there for a few breaths. Then roll yourself over on the ball so that you are on your back. Use your hands to balance as you do this or you may fall off the ball. Once you are on your back, prepare just as you would for the regular Tabletop Crunch on Ball (#9). Once you have set up to do the crunch, extend one leg so that the thighs are parallel and one leg is extended straight out with only one foot on the floor. First see if you can maintain this position. Then, if you can, do the crunches as in the previous description. Repeat until fatigue. Do the other side.

Stud muffin version: Put the hands behind your head.

Xena, Warrior princess version: Extend your hands out above your head.

Unspeakably hard version: Put weight in your extended hands.