I didn't see that comment as a generalization. I think most of us here understand that the body's capability is largely built through activity, not inherently limited by age. But, I do think it's true that many people my age (I'm slightly more sixty-ish than you are) do not feel comfortable with the kinds of motions needed to mount a drop-bar single or to get in a low 'bent. I'm not saying they're making a correct self-assessment or that with some conditioning (perhaps yoga) they could not build back some basic capability - I believe most could. I also have seen that some loss of capabiity with aging can progress to the point where it is not reversible. Some of this may be in the mind, but some it might not be. But a serious blockage in the mind can be as debilitating as loss of nerve function.

What's clear for you and at least the other 50+ers on the last OHR is that if you don't lose it, you'll still have it when sixty-ish or older, and can even build capability. As you know, a lot of those kids cannot do what you can.