|Dai-Shihan Ben Froidevaux, 6th dan and All-Europe |
representative of Seiyo no Shorin-Ryu Karate
Human bones are very strong and can resist strikes. A bone can survive a strike generating 10,000 joules of kinetic energy (3,700 foot-pounds of force) as long at the strike is perpendicular to its surface, and like most bones, covered with soft tissue that adsorbs the impact. But a strike at an angle less than 15 degrees can potentially fracture a bone with a strike of about 375 joules of kinetic energy (277 foot-pounds of force).