The modified curl-up exercise involves placing hands under the low back, lifting the head, neck, and shoulders, and contracting the abdominals while breathing through the diaphragm.

“put your hands under your low back as you're laying on the ground lift your elbows now hover up your head neck and shoulders and we're going to propel the abdominal contraction breathe through per flips and allow the diaphragm to become the athlete inside this Barrel so that was the foundation of the modified curup”