Centenarians are the fastest increasing age group in the US. Silly to think that trend won't continue. I had a doctor who said that researchers would be studying us athletic baby boomers for a generation, trying to figure out how we did it. That said, the average lifespan isn't increasing right now, which means that the rich (that's us) are living longer and the poor are dying younger. The wealth disparity in the US is increasing at the fastest rate in the world, even beating out India. Wealth = lifespan. "Rich" in this country now equals having enough to eat and medical care. A bike is pretty cheap, the rest of it not so much.
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Results matter