My average age is about 36. My actual age is 49. I have this belief that enough liquor preserves a man. Kinda pickles you, so that's taken a few yrs off. Take my advice, buy better liquor! It helps.
Then I believe that riding dirt bikes real hard and fast both ages you and un-ages you. Every time you really get hurt and have surgery, you age an extra year or two. Each time you come close to a major crash but don't, you age a few months, between 3 and 12 months, depending on the closeness of true disaster. But then, just riding and having fun turns back the years. Doing well in a race series takes off a year or two, several really good fun trail rides removes a few months, maybe even a whole year on occasion. Spending as many hours working on your bike as actually riding can either add or take away, depending on if you can fix the problems or not, and the cost. Getting a new bike takes off a couple months. Getting a nice used bike takes off a month or so, unless it's a real problem bike and you hate it, then add some. When you sell it and get another, you just kinda have to guess and adjust on the age-benefit/cost.
When you get really hurt and can't ride for a year, you age roughly 2 yrs. But if you come back 100%, and have a couple good years without serious injuries, you get back about double age. Depends on the person. You kinda have to put the calculator to it.
Bench racing, which I call campfire racing, cause I never once have seen anyone bench race on an actual bench, usually takes away some age, unless you happen to end up BSing with some guy who has finished several ISDT-Es, has ridden with the legends or is one, does the Roof of Africa for fun, you know, the smartass sumbitches who make you feel older.
Overall, I think I'm about 36. If I was one of those "Hero" type sumbitches, I'd only be about 29. Don't remind me I'm almost 50. I'll punch you in the nose so hard you'll gain a few years. I'll hit you so hard you'll travel back in time to tell the young you not to piss me off! Wait, I can't punch that hard anymore. They say laughter keeps you young, so who knows? You might gain some time laughing at my old ass after I hit you.
What the hell, I'm old and tired. Better turn in and get my geezer nap.