good genes & diet don't hurt. my Dad is 92 & I never saw him on a bike. he had a desk job his whole life but he brought us up hiking, mountaineering & light rock climbing on the weekends. in cold weather we built a small fire for lunchtime. he loves going in the ocean but wasn't really a swimmer. Mom is 89 & still shops & cooks for them both. they still live in the house I grew up in; laundry in the basement & bedrooms on the 2nd floor. my Dad recently told me he has no money to leave me, only longevity. hope he's right!