The roots of Grimz Boxing began on the levee of the Sacramento River. Training was spartan, but intense and always original: backwards and sideways on the levee walls, hopping up and skimming down 2-level staircases, sparring in tennis courts, hijacking weight rooms, punching bags in living rooms.

From these innovative beginnings we now offer you GRIMZ BOXING. The intensity remains, but the unique and original ideas have advanced to a new level. They have quite simply gone beyond the next level.