I recently had a minor fall that didnât cause any real injury, partly thanks to my bioâmechanical armor and the fact that Iâm a junior bodybuilder whoâs already been hardening his muscles with daily weight training. The incident reminded me of how much muscle protects you in a slip, so I started thinking about using everyday objectsâlike jewelryâto keep muscles active. I explained the idea to an elderly friend (a 78âyearâold whoâs worked out for half a century) and suggested starting with a heavy chain around each wrist, then gradually adding neoprene wrist weights up to a few pounds; this âselfâdefense chainâ method would let anyone, even a frail person, maintain muscle tone without a gym.






















