Does fasted running mess with your period? new study investigates
NCT ID NCT06471582
First seen May 02, 2026 · Last updated May 13, 2026 · Updated 1 time
Summary
This study looks at how exercising without eating first (fasted exercise) may change reproductive hormones and menstrual cycle length in women who regularly run or cycle. Over about 3 months, 64 participants will track their cycles, complete 90-minute exercise sessions either fed or fasted, and provide saliva samples. The goal is to understand how timing of energy intake affects menstrual health, not to treat any condition.
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This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
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Study contacts
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Contact
Phone: •••-•••-•••• Email: •••••@•••••
Locations
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William J. Hybl Sports Medicine and Performance Center
RECRUITINGColorado Springs, Colorado, 80918, United States
Contact Phone: •••-•••-•••• Email: •••••@•••••
Conditions
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