Rope Climb Crunch
Lie on your back with your knees bent, feet flat on the floor, and your lower back arching naturally. Imagine there is a rope hanging from the ceiling and dropping right through your chest. Reach up with both arms toward the rope and curl your head and shoulders up off the floor.
Reach up with your hands and “climb” the rope, twisting side to side and lifting up while keeping your head and shoulders off the ground.
Tip: The higher you reach, the more your obliques are engaged.
Get into plank with your hands underneath your shoulders and your head, hips, and heels in line. With your hands as the pivot point, walk your feet around in a circle. Go one complete revolution in each direction to complete one rep.
Tip: Keep strict plank form, even while you’re moving. Your hips should be low, your head neutral, and your spine straight.