Now I'm going to show you the proper form to do a reverse crunch. So you're going to lie down on your back on the mat. Bring the legs up to ninety degrees okay? Not a lot of movement here, but it's very effective. Okay? You're going to bring the elbows. And you notice I brought the knees slightly into my midsection. Okay? You can even extend out slightly. Okay. But then bring the knees in as the elbows come up. Okay. Keep the hands lightly on the back of the head. Keep the chin neutral. Looking right above eye level; really helps having a focal point to look at. High repetitions, and remember, bring the elbows in as the knees come in. Same time. So try not to rock back and forth when you do this. Just try to keep it nice and tight when you come up. Nice contraction as you come up with the knees meeting the elbows. Okay? And that is the proper form to do a reverse crunch.