In my younger days of early Karate training ,like all youngsters i wanted to be tough n' hard and tensed muscles all the time and jaw ache from clenching my teeth. This was before i discovered the arts of relaxation after the science of pure bone idleness. I discovered Tai-Chi and the incredible speed and power that training slowly and gently with proper breathing can give you. This was a real eye opening moment ,the holy grail for a died in the wooly-bed blanket lazy bastard !
We used to go to boozers all over the place on our'jolly boys outings!' After a 'skinful' it was time to put the locals in their place. As the groups muscely little bugger i got pulled into the arm wrestling and grinding of teeth ,muscle popping grunting n' straining ensued. I didn't do too bad ,but the tendons in the wrist and in the crook of the arm got a good straining.
Managed to ease off all this silly stuff and recently i had an arm wrestle and relaxed myself instead of powering into it and "dang my thighs" if it didn't work !?....The secret to everything is relaxation, simple as that ,but it's hard to totally relax ,knackering stuff this relaxation, let me tell you !