Webwithin minutes of entering the sauna, your heart rate increases by 30 percent or more as your body directs blood flow to your skin's surface.

Webno, a sauna is not as good as cardio for improving cardiovascular fitness.

While it can increase heart rate, it doesn't provide the same cardiovascular conditioning.

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In a sauna, heat wraps around you like a cozy blanket, nudging your heart rate up almost as if you're.

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