Another one seeminly "headed downhill"

I have seen too many of my peers (age-wise) with ailments that I do not have for all sorts of reasons. One friend of mine has nerve damage in his neck to the point that he can't feel his hands and he spent most of the last 30 years with a desk job (probably contributed to his problems looking at a computer screen all day). We all seem to age a different speeds whether we take care of ourselves or not. Genetics seems to be the biggest contributor...