HOW: In a standing position, grab a theraband with both hands. With your thumb up, bring one arm up over your head in a diagonal direction (make sure there is no resistance bringing this arm up). The other hand should pull the band down at your side creating resistance for the arm that is up. Then, slowly lower the arm back down in a diagonal direction.
FEEL: You should feel your shoulder muscles working.
COMPENSATION: Don’t bring your up next to your head or up at your side, it should be up overhead in diagonal position.