Primary Muscle Groups: Upper Abs, Lower Abs, Lats (back) Secondary Muscle Groups: Side Shoulders, Front Shoulders, Rear Shoulders, Transverse Abdominis, Quads Lie on your stomach with toes tucked in and palms by your shoulders. Lift your entire torso off the ground. Lower your entire torso into an elbow plank. Return to the high plank. (One…

Flexing and extending the spine can help improve circulation in the discs in your back. It can also improve your posture and balance!