I was just thinking about this a little while ago. I recently turned 40, and though I'm fit and usually get taken for being younger I'm getting quite grey and can certainly see the changes. I'll catch a new wrinkle here or a skin spot there and suddenly feel that aging is creeping up on me in little hops and spurts. But what I was just thinking today is that exercise and an active life is what keeps me happy about myself. I have friends my age and older who are fitter and stronger and way cool, I aspire to be like them, wrinkles and all. I have friends younger than me that aspire to be as fit as I am. And the good thing about that is that it's attainable, while getting younger just isn't. When I'm not happy about myself it's not really my age or looks, it's lack of exercise, too much yucky food, lack of achievement, and feeling unfit. Which is reversible, and that my friends, is a beautiful thing 
One thing I do take seriously about getting older is avoiding injury, though. Things I would bounce back from in days as a 20-30 yr.old can have me aching for weeks now, so I am definitely more careful. Breaks and sprains are a big setback.
eta: I just saw Veronicas comment on the other thread about 40 not being "old" or "aging", and wanted to add - I agree that 40 isn't "old", but then I think we read a whole lot of negative things into being "old" and a lot of positive things into being or feeling "young" which aren't quite necessary. I am noticeably oldER at 40 than at 30, but in good ways too, I'm wiser, more laidback, more experienced. At 50 and 60 I will probably feel more negative physical effects from being older, but they may well be counterbalanced by positive effects too, and as fitness and activity goes, I might even have more time for this as my son grows up. I'm doodling here, but anyway - I think the simplistic old=bad, young=good thinking is more suitable for people who don't exercise much (and maybe for top athletes going all out). For those of us who exercise a fair bit feeling "good" is more connected to exercise, sleep, time, health, stress and diet than just age.
Last edited by lph; 04-07-2010 at 09:50 AM.
Winter riding is much less about badassery and much more about bundle-uppery. - malkin
1995 Kona Cinder Cone commuterFrankenbike/Selle Italia SLR Lady Gel Flow
2008 white Nakamura Summit Custom mtb/Terry Falcon X
2000 Schwinn Fastback Comp road bike/Specialized Jett