CHIN UP

START: Grab onto a chin-up bar with an underhand grip and your hands spaced shoulder-width apart. Hang from the bar with your arms fully extended and your chest high while exaggerating the arch in your lower back. MOVE: Pull yourself up by squeezing your shoulder blades together and contracting your lats, until your chin passes the bar. Hold the contraction at the top for a second before slowly lowering yourself back to the start.