With hands about shoulder width apart, take a supinated grip and hang actively from the bar in a hollow position. (Shoulders depressed, Core and Lats engaged)
Raise your knees to parallel by exhaling, and bracing your core.
Keep your arms straight and engage your lats to restrict upper body movement.
Squeeze at the top and slowly control back down.
Repeat for repetitions.
Keep the arms straight, limit movement from your upper body.