How to Do Pilates Crunches - part of the women's fitness video series by GeoBeats. Hi, my name is Michelle and I'm here at Apex Wellness, and I'm going to demo for you Pilates Crunches. Lay on your back, put your feet up to the ceiling, and flex your feet. Interlock your thumbs and you're going to do 10 series of reaching towards your toes. Just like that. You're going to do 3 sets of that to really engage your core and get your tummy muscles toned up. Just like that.