[blunte]

I have a few small spider veins, but I've had them for 10 years already. And since I work from home, I can play James Brown any time I want. You can imagine I get down; I'm not static.

Slightly more seriously, there is no one answer. But in terms of total human history, sitting isn't something we spent a lot of time doing. Sleeping, lying flat, we obviously spend about 1/4 to 1/3 of our time doing. Standing or walking or running surely must be a big portion of the rest. Sitting would only be reserved for when you have the time to "do nothing". That's kind of a new concept. Thusly, I'm not afraid.

For a 50 year old nerd who hasn't exercised in a year, I'm still well above the health and capabilities of a lot of same age people. And when I'm in a good environment with outdoor play areas (mountain biking) or indoor gyms, I'm fit. Aesthetically, losing hair and gaining less elastic skin is much more a concern to me than some tiny purple lines in my ankles or knees :/