US Patent 9504893 Body hardening machine that simulates martial arts sparring

The present invention concerns a machine for martial arts training that simulates sparring with a live partner and provides a safe tool for body hardening. The machine is a vertical alignment of three independently rotatable alpha bodies having arms and a weighted base, where each alpha body rotates when met by force from a user. The machine facilitates martial arts offensive strikes and defensive moves, which safely promotes the formation of calcium deposits and scar tissue about key nerve areas to give the body a hardened feel.