Your favorite ab-building machine at the gym may be causing you more harm than good. That's right—we're talking about the torso rotation machine. This is the Chubby Checker–inspired ab machine you sit ...
R: Return cues to starting posture. N: TRX resisted torso rotation (press/row) A: Mid-length P: SSW S: Align right shoulder with anchor point, grip handle with right hand, place left hand over right ...