Balrog
Master of Arts
I'm one of them. I'm nearly 70. I hurt all over the place and I know I've lost flexibility. That doesn't stop me from trying to do the best that I can and more importantly, teaching my students to do the best they can.For me, proficiency is the key. I used to do weights everyday, but given my small build, I was not "a bodybuilder".
To me, a tkd blackbelt who is not proficient (e.g., an older person who has no power, flexibility, or punching coordination) is not a martial artist in spite of the black belt. I'm sure others would disagree.