HOW: Begin standing with a looped band around your wrist. Extend your elbows and arms straight out from your chest. Create some tension in the band and maintain that tension while you turn your arms in a circular motion(like turning a steering wheel) back and forth for the prescribed amount of reps.
FEEL: You should feel your shoulder muscles working.
COMPENSATION: Don’t lean while turning your arms, stay upright. Don’t lose tension in the band with your arms.