ROCK JAW Neck and Jaw Strengthener

Discussion in 'MMA Discussions' started by rockjaw, Oct 5, 2012.

  1. rockjaw

    rockjaw New Member

    Just want to share the Rock Jaw with you MMA fighters. Strengthens front and back of neck and jaw muscle. Insert mouth guard ,let rock bag hang and lift your head up and down for repititions. Can purchase on ebay (search rock jaw neck and jaw strenghthener)

  2. Kevin

    Kevin Administrator Staff Member

    Speaking as someone who has a neck injury, that looks very painful! :)
  3. MMA Coupons

    MMA Coupons New Member

    Sounds like a bad idea!

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