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brainburger t1_itrqja9 wrote

Yes fitness affects covid prognoses. So does the vaccine. What this study looks at is do these effects interract with each other?

I'll just invent some numbers for illustration. Let's say that the vaccine makes you 10% safer, and exercise also makes you 10% safer. You might expect both to make you 20% safer. But what is that number? It might be 15%. This study indicates that the whole is greater than the sum, so call it 25% in my example.

This is useful to know as we could give advice to patients to either take exercise or rest up after having the vaccine. We don't know the true effect until we look carefully at the numbers.

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