[ckissick]

I'm 64 and have been hiking/running and rock climbing in a gym for a few years, and it seems to be working very well. I do long hikes with a lot of vertical so I can climb mountains in the Sierra that are over 14,000 feet. It's strenuous, but I go slow and steady, and I think this will keep me going strong into my 80s and hopefully 90s. Some guy recently hiked to the top of Half Dome at 93. I want to beat that record in 30 years.

What I'm doing may not be considered basic maintenance, but you can scale it back to whatever level you like. The rock climbing keeps me strong and flexible, and it's fun, unlike weight lifting.