Quote:
Originally Posted by LancelotsLover
Also, to make ball crunches harder, you can do a twist variation, where you bring one knee up as you crunch, and twist your opposite elbow toward it. Sort of like a bicycle crunch, but on the ball. If you're new to that, you might want to keep your other arm hanging down beside the ball touching the floor, to keep your balance.
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Another approach would be to put your feet against the top of a weight bench, and when then got too easy, put them on top of the bench.