This total body baseball training system strengthens and stretches sport specific muscle groups, improves balance, agility and stamina. Comes complete with Baseball or Softball Xertube™, Xering™, balance pad, and instruction chart. This product was used by the US Olympic softball team and will definitely strengthen your "sport specific" muscles. It comes with a thorough manual with several different exercises. It also comes in three resistance levels for all ages and ability levels. IN STOCK.