Is longevity determined more by lifestyle or by genetics?

pbpullman

New member
I know 90 year olds that can run marathons. These are the guys that have made a committment to living healthy decades ago.

But why do some people (like Patrick Swayze) who are also healthy (so I've heard) suddenly get mowed over by cancer? Did he have a genetic disposition to cancer? Is cancer really such a sinister disease that it can strike anyone at anytime, with no consideration to their health level?
 
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