Marco Polo, remember him??? When he was writing about all his adventures to the far east he made a comment or two about the Bhudist monks who live to be 150-200 years old. He said they're amazing people. Always busy and ate only was what good for the human body. He was amazed at how busy these people were even into 150 years old. No retirement there.
By the time most people get sick so they have to do something about it they've already been sick for 20-30 years. So the clean up and rebuilding takes some time. And unfortunately you can't get those years back.
But once healthy you age much slower. I don't see any problem at all living to be 150, IF we weren't being systematically poisoned on a daily basis. As it stands now people don't have a chance. Their parents and grandparents were poisoned. They start life getting poisoned via vaccinations and drugs. It's in the food and water.
However, once clean and well norished the aging process slows down considerably. I think "noramal" is about 120 to 150 years.
You should enjoy all the "privilages" of youth until about 60, okay 70, then middle age from 60-70 to about 100-110, only then should old age creep up on you. By then you're just this wise old person spreading wisdom around. Sounds good to me.
I lost almost 34 years so I figure I'll be around till about 90. Not bad. If we have a world left to be around in that is.