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Raise your hand if you loath abdominal crunches. My hand is up too. They are boring, and quite honestly, there are other exercises that are way more fun and more effective at strengthening the midsection than crunches. In fact, I very rarely even put crunches on my clients’ programs. Instead, I trick them into doing ab work with moves that require multiple joints, and usually a toy.
Stability Ball Knee Tucks are among my all time faves. The toy of choice: the stability ball (and if you don’t have one, visit
Perform Better and grab a quality Fitball Sports Stability Ball- they are the best!)
To begin this exercise, it is easiest to kneel in front of your stability ball and roll out over the top of it until the ball is under your knees. Notice the amount of core stabilization required to hold the ball steady under the weight of your legs even before you begin the first rep! Amazing.
Hands should be stacked directly under the shoulders. For clients who have wrist issues, I use neoprene dumbbells, which are slightly padded and more comfortable, and have them grip those while in this plank position so that the wrists are neutral rather than bent. Abdominals should be drawn in toward the spine. I refer to this as “zipping it up,” and head/neck should be neutral (i.e, don’t look at the ball, the ceiling, your cell phone…).
Next, slowly draw your knees toward your chest while keeping abdominals muscles engaged throughout the movement. Hold for 2 counts, then return to the starting position for 2 counts. Repeat for 8-14 reps.
Check out the video from ACE for a visual reference: Stability Ball Knee Tucks Video
To advance this exercise, start with the ball placed under the shins, or even the toes if you really want to go gangbusters.
Note: if you experience any back pain at all during this exercise, STOP, and do not continue. Consult your trainer before attempting this exercise again.
* Note: Blue Sky Gym and the author disclaim any liability for any injury, physical or emotional, suffered during or as a result of exercise or activities recommended. As always, you should use common sense and consult your health professional before beginning any exercise routine or program.