The strongest muscle is between your ears. Avoiding conflict is the best move. Father Time is a cruel S.O.B! Not everybody is Steven Segal or Chuck Norris.
My father grew up in the oil fields, connecting iron on tall buildings and ranching. He's 77 and I still wouldn't want to tangle with him. But he'd just as soon shoot ya if he had to. Luckily his temper has mellowed with age too.
Don't think he ever tried a roundhouse kick like Walker, Texas Ranger. That guy didin't even need a gun.