How to: Face down on the ground with feet hip width apart, elbows directly below your shoulders & placed on the floor. Elevate your hips off the ground, creating a neutral spine. Keep your abdominals drawn inward and gluteals engaged.
Compensations: Watch for arching of the low back, rounding the shoulders forward, raising the butt to the sky or dropping your head. Gluteals must be engaged throughout the set with abdomen tight.