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If you are in bad shape at 73, you are probably not going to make it to 100. This is called 'compression of morbidity'. As people age better, the period of disability & lower quality of life shrinks, so you tend to live longer in good health but then once something goes wrong, you'll be dead quickly. A lot of centenarians are pretty active, even driving cars, until months or weeks before they die (and they may simply die in their sleep unexpectedly). It's the people who are in bad health in their 50s or 60s who can look forward to decades of expensive & painful ill health before they finally die... In any case, most centenarians I've seen interviewed seem happy to be alive, and don't wish for the sweet mercy of oblivion, so I am happy to take them at their word that they find their life worth living.

Most definitely, my father has recently been falling which is understandable with his Parkinson's but concerning as it is a recent development. My mother is exhibiting far more vitality and will probably outdo my gps as they all lived relatively unhealthy mid-Century American lives but into their 80s and 90s.

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