officialjerz: Zottman Curl One of my new favorite exercises is the Zottman curl. This exercise is one of the very few that work both the short head and long head bicep muscles. By turning your wrist 90 degrees you get a max effort from your biceps and the most out of your muscles. Muscle-jerkers and back-curlers beware, you cannot properly do this without isolating your biceps. #happylifting #jerzfit #WTFambassador #WTFwarrior #WitnessTheFitness