... weight 150 kgs 3) It contains: Total Core, manual 4) LCD showed counter, time, step/min, ... workout your front core, upper and lower ABS, side obliques, lower back, and back of your core, all at ... causes stain on the neck, shoulders and lower back. The Total Core eliminates this first jerking ... unique progressive resistance, which works your lower back muscles and the "back" of the core. Product Dimension: ...