"The crunch is a good core exercise that also helps you build muscle," Tate told POPSUGAR. "The crunch isolates the ab group, making it the primary focus . . . This exercise is very popular with assisting people in building not only core strength but also muscle strength and definition."
- Lie on your back with your knees bent and your feet about 12 inches from your butt. Put your hands behind your ears.
- Focusing on your core muscles, lift your head and shoulders and raise up until your head, shoulders, and back are off the floor. Keep your belly button pulled in.
- Lower back down to complete one rep.
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