Fasted exercise: boon or bust for brain and body?

NCT ID NCT05919979

First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 2 times

Summary

This study looked at how doing high-intensity exercise while fasting for 24-34 hours changes energy use and thinking skills in 25 healthy adults. Participants either rested or exercised during the fast, and researchers measured things like breathing, blood sugar, and cognitive tests. The goal is to better understand how fasting and exercise work together.

What this could mean

Our plain-language read of the trial. This is informational only — not medical advice or a prediction.

Active substance
high-intensity exercise during fasting
What this could lead to
If successful, this could help clarify how exercise during fasting affects metabolism and brain function, potentially guiding future health recommendations.
What could go wrong
This is a very small pilot study (25 people) in healthy adults, so results may not apply to the general population or lead to any immediate practical advice.

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As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Contacts and locations

Locations

  • Instiuto Mixto Universitario Deporte y Salud

    Granada, Granada, 18007, Spain

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