HOW: Start in a sitting position with your legs straight and slightly spread apart. Your back should be upright and slightly hinged forward at the hips. Extend your arms out to the side straight out from your shoulders. From here, rotate your upper body to try and touch one arm to the opposite ankle. Alternate to each side for the prescribed amount of reps.
FEEL: You should feel a stretch in your hamstrings, mid back, and shoulders.
COMPENSATION: Keep your back upright and arms out to the side each time you try and touch your foot.