Your lower back is part of this muscle group. But if you walk around the gym, you're more likely to see other guys repping out sit-ups, crunches, and leg lifts to train the core. They're focused on ...
Higgins also recommends hula hoop v-sits to target belly fat. Another hula hoop exercise you'll do while sitting on the floor, Higgins explains, "It's a workout that helps you build a strong core.