Is there a viable alternative to getting old?

They say that getting old is better than the alternative.

I just wish there was a third way to go. Something sideways to aging and creaky knees and faulty memory, and inability to find words quickly. Your friends start dying of horrible things like pancreatic cancer. You don’t have the stamina you once had. You can’t climb Mt Everest any more.

Can’t there be some kind of tesseract one could pass through and find oneself—not young, but definitely hale, or in a place where creeping infirmity didn’t matter? Is there such a place? Even if there isn’t, what would such a place be like, if we could go there?