This is a half-kneeling open book, a mobility drill we use often with rotational athletes like golfers, tennis players, baseball hitters, to improve hip-shoulder separation and spine mobility. - Start in a half-kneeling position with your inside knee down - Use a foam roller or ball to stabilize the front leg - Keep the pelvis locked in while you rotate through the upper back - Don’t force range — move through what you own If you can’t separate through the hips and shoulders, you won’t store or release energy efficiently. This drill helps build that foundation. #ArchitechAthlete #MobilityTraining #RotationalPower @dr.chriscox