SETUP: Lie flat on the ground and grab hold of something very secure behind your head. A neutral-grip works best. Keeping a slight bend at the knee, and your feet together, raise your legs until they are at a 90* angle.
LIFT: This is where the rep begins. Drive your hips up, keeping your abs and lower back tight, until you get as high as you can go. Slowly lower back to the floor and go again.
TIP: You can combine this exercise with Anchored Leg Raises for a challenging combo.