After the initial acute phase, caffeine produces a secondary effect where it stimulates nitric oxide release, causing vasodilation and opening of blood vessels, which allows better oxygen-rich blood delivery to muscles and may improve performance.

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Unidentified Speaker — 10 Eye-Opening Heart Rate Truths REVEALED [V5lO5ZflsoE]

Evidence Quote

after a while caffeine seems to have the opposite effect where it actually results in what's called vasodilation and it does this by stimulating the release of nitric oxide nitric oxide is a very is very well known for being it used to calm people so it opens up your blood vessels

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10 Eye-Opening Heart Rate Truths REVEALEDCoach Parry
Created: 8/13/2026, 10:26:22 AM

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