A low rig is a sequence of low-hanging grips that tests your grip strength, shoulder stability, and body control close to the ground, where you must move smoothly without big swings. Keep your core tight, elbows close, and look ahead to the next hold rather than at your hands. Focus on controlled transitions instead of speed. To train for it, work on dead hangs for grip endurance, active hangs to keep your shoulders engaged, towel pull-ups to strengthen forearms, and core stability (planks, hollow holds) to maintain a steady body position while moving between grips.