Your body is Surprisingly Inefficient
When you exercise, your body generates a tremendous amount of internal heat—sometimes over 1500 watts, comparable to a hair dryer. To avoid overheating, this heat must be transferred from your muscles to your skin, then released into the environment. But humans are surprisingly inefficient, with some activities over 90% of your energy during activity becomes heat, not movement.
How Your Body Stays Cool
Your body uses two main methods to move heat:
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Conduction: Slow heat movement through muscle tissue (inefficient)
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Convection: Fast heat transfer via blood flow (highly effective)
As your core temperature rises, your body increases skin blood flow—from about 0.3 L/min at rest to as much as 7–8 L/min—to transfer heat from inside the body to the skin’s surface. This blood flow is critical for thermoregulation and is the only factor under physiological control during exercise.
Why Nitric Oxide (NO) Is Crucial
Nitric oxide (NO) is a molecule that signals blood vessels to expand, allowing more blood (and heat) to move to the skin. NO is made from the amino acid L-arginine, but its production can be blocked by stress, poor diet, or age.
Two Ways to Boost Blood Flow Naturally
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L-Citrulline
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A precursor to L-arginine that’s better absorbed and more effective at increasing NO levels.
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Helps sustain vasodilation during exercise or heat exposure.
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Vitamin C (Ascorbic Acid)
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Protects NO from oxidative degradation.
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Enhances and prolongs blood flow by preventing NO loss to harmful byproducts like peroxynitrite.
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The Heat Hydration Solution
Heat Hydration combines both strategies in one formula:
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L-Citrulline, L-Arginine, and Beetroot Extract to fuel nitric oxide production
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Vitamin C to protect NO and maintain blood vessel dilation
This dual-action approach enhances thermoregulation, exercise performance, and safety in high-heat environments.
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To learn more about the science behind the matter, check out our blog.