People do polar plunges into cold water, outside in the winter in order to strengthen their immune systems.
People do polar plunges into cold water, outside in the winter in order to strengthen their immune systems.
They don't stay there long term. That is thermal shock. Chronic stress is bad. Short bursts of stress is good.
They don't stay there long term. That is thermal shock. Chronic stress is bad. Short bursts of stress is good.
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