I believe exercise damages much of your body in small doses which get stronger after rest. But doesn’t getting sick do the same thing? Shouldn’t you get stronger after getting sick? And if not why do extroverts live longer? Wouldn’t they be exposed to more illness and have decreased lifespan?
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You’re not working the same parts of your body or in the same way. For instance, you work out so you use your lungs. If you push them to their limit, your body signals that it needs stronger lungs to keep up with demand.
If you get sick, you’ve got viruses replicating inside your cells and releasing toxic byproducts. Your body signals to turn down normal metabolic processes and turn up features to destroy infected cells and capture their byproducts.
You do get stronger at fighting that specific illness for next time though. So you’re partly right.
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