Exercise and protein. Mobility and meat. There are thousands of books, blogs, and videos on these topics, so it’s easy to feel confused.

Truth is, exercise is not the key to losing weight. It’ll help, but when it comes to burning calories, it’s actually pretty inefficient. To burn 1,000 calories, you would have to run - not walk - for hours. And it’s important to eat the right protein to feel right.

So what is exercise good for? Quite a lot.

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