Straddle V-Up Lie face up with your arms overhead and legs extended, resting on the floor. Keep your abs engaged by pulling your belly button into your spin and pressing your lower back into the floor. Lift your hands and feet a few inches off of the floor into a hollow position. Like the v-up, reach your arms forward toward your legs as you simultaneously split your legs into a straddle position. Reach through your legs. Lower your arms and legs toward the floor with control back into a hollow position to complete one rep. Carey recommends doing 25 to 30 reps. Image Source: POPSUGAR Photography / Sam Brodsky