Randomized Trialmoderate evidence
Acute partial sleep deprivation attenuates cardiac output during moderate-intensity cycling in young adults.
American journal of physiology. Heart and circulatory physiology·November 1, 2026·PMID 42853588
Why it mattersSleep loss is common among active individuals and may impair cardiovascular responses to exercise. This study identifies a specific hemodynamic mechanism—blunted stroke volume without heart rate compensation—that could reduce exercise tolerance or performance after poor sleep.
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