Jack LaLanne obviously had a massive influence on health & exercise, he was legendary no doubt. Please someone hack his diet, from my (limited) reading he subsisted on fish, brown rice, egg whites, fruit & veg. My curiosity has come from the lack of animals & egg yolks, & the regular consumption of fish(i know pollution wasn't as bad years ago) don't get me wrong, i don't think for one minute you can't survive without animals & egg yolks but he managed to do it with grandeur. As an afterthought he seemed to exercise to a bit of an extreme too, compared to our more modern way of thinking.
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Doesn't seem that horrible to me. Leaps and bounds above SAD. Likely influenced by fear of saturated fat and cholesterol, but he just didn't know better...
He also did what he loved to do, and he avoided sugar and processed food religously (or at least he said so). He was waaaay ahead of almost anyone, albeit not paleo. :)
If you watch some of his older stuff, it's VERY paleo, very reasonable diets. For example, see: https://www.youtube.com/watch?v=VuW3RfWJ1H0 Yes there's a little fat restriction, but that's simply his method of calorie restriction.
Jack had an older brother who lived to just about the same age as Jack did, so there's probably a lot of genetic influence going on there.