A rotational sports training and conditioning system has a hip harness, a torso harness, a pair of adjustable connectors that connect diagonally from the torso harness to the hip harness, an elongated cord and a club band. The hip and torso harnesses each have selectively positioned cord loops for attachment of the cord and/or the club band. The connectors selectively synchronize relative rotation of the pelvis and torso for swing, strike or throw training and conditioning. The cord assists or resists rotational motions. The club band synchronizes arm positioning and forearm rotation with rotation of the pelvis and upper torso.