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humorist-workshop
Jackknife I think.
I read about a type of crunch called the Jackknife. * You put your hands be hand your heads and your legs straight out then bring you body up and your legs/knees to your face * and I read that this is a brutal but very effective excersise and it really helped several girls get that washboard stomach. Has anyone else ever done these and what type of results did you get?
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Jacknife crunches aren't as good as you may think. Stick with the basic crunch- it's tried and true.
If you really want a challenging variation...try doing regular crunches on one of those big stability balls all the way to failure. Ow.
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These style of chrunches work great if you want great results, and fast too! But, they can put strain on your back and neck. Good luck with your chrunches!
♥ Lydia
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Prone Jackknife. I've heard of it either way now. I would do it because it works out fine but the bad part is that if effects the back and spinal issue. But if you feel pains tehn i would stop with that and just do crunches.
trix
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