The “myotatic crunch” is a variation on the sit-up which often involves a BOSU ball. To perform a myotatic crunch, lie on your back on the floor with your knees bent, feet flat, and a BOSU ball positioned under your lower back. Keeping your feet on the floor, lift your head and shoulders off the floor and crunch your ribcage to your pelvis.
There is a muscle that is often overlooked. It’s called the “serratus anterior” and it is rarely used in our every day activities. However, it is the muscle that is the key to activating the pectoral muscles. A great exercise for the serratus anterior is the Myotatic Crunch.