Obviously, I'd like to maintain my body and will. When I was in Maryland for a year, my landlady was 104 years old, and quite sharp. Her daughter was 80 and crazy spry. Every day my landlady would be out on the porch, cleaning and organizing. She couldn't run around, and she was probably past the point where I'd enjoy spending eternity, but the point is that her bloodline was amazing. I could certainly spend an eternity with the health that her 80 year old daughter had. She could pick up her grandson, and get around the yard just fine.

Part of the whole agelessness thing is that some of the mechanics of how our cells breakdown and begin to fail would need to be cured. At which point, our bones, and muscles, if cured of that deterioration, would lead to curing death, but it would also lead to the ability to maintain your health and body. As long as you continue to exercise, and eat well, you'd probably have a body similar to an average fit modern 40 year old I'd expect. Or somewhere between the crazy metabolism of 20 year olds, and the deterioration of 70 year olds.

I don't know any of the science though, so just speculating based on what I've read, and my opinions.