Hold a medicine ball and stand tall with your legs straight, feet hip-width apart, hips centered and abs engaged. Keeping your lower body planted, twist from the waist toward the left and extend your arms overhead and toward the left side of your head (pictured).
EXHALE: Keep your arms straight and your Feet planted as you twist your torso toward the right and lower your straight arms on a diagonal across the body and down toward your right foot, slightly bending both knees and pivoting on your left foot. INHALE: Reverse the movement, twisting your torso toward the left, straightening your legs and lifting your arms back up toward the left side of your head to complete one rep. Perform all reps on this side and then switch sides to complete on set.
Keep your arms as straight as possible at all times and relax your shoulders away from your ears. Pull your abs in tight to protect your back while you twist side to side.
Muscles Worked: Abs, Obliques, Shoulders