I'm with you. At only 48 I'm in better shape than when I was a kid in the Infantry. And I don't have to sit at the children's table during Thanksgiving anymore!
As the years progressed I slowly started improving my diet and lifestyle to help counter some heart disease and diabetes on my dad's side. I went to the 75th wedding anniversary of my mom's grandparents (triple digits!), and her mom lived to 97. Mom is still kickin' it in her mid 70's!
I sat with my grandmother once while she told me about living through WWI, The Great Depression, moving to Kansas in a covered wagon, rural electrification, WWII, telephones, cars(!) and planes(!), Korean War, Vietnam War, JFK, landing on the moon, computers, medical marvels, and the Internet. My mom told me about hearing stories from her uncles about when they fought in the Civil War. The big thing that I got from their retrospective is this: The most important thing in life is how we treat each other, and how we respond to events. In some ways we've gotten better, but in others worse.
The public perception of our leaders used to be that we were choosing among the best of us, now we feel like we just get the most corrupt with the deepest pockets. Grandma was very disappointed with the administrations of the last 50 years. But she was so proud of her children, grandchildren, great-grandchildren, and the couple great-great-grandchildren.
I figure, with luck and progressing tech, I'll have a long life in which to play with toys and more grandkids.