Den här översättningen är inte klar ännu. Den här sidan är just nu på engelska.

Gå till den engelska sidan

Cure My Disease

Don't miss your cure!

 Log in / Sign up

Fasted exercise: boon or bust for brain and body?

NCT ID NCT05919979

Knowledge-focused Sponsor: Universidad de Granada Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

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.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

25 people

The number who actually took part.

Started

May 2023

Finished

Jun 2025

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 to 40 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * 18-40 years old. * Body mass index: 18.5-30.0 Kg/m2. * Stable body weight (5kg range within the last 3 months) * Being able to consume all the food items provided as part of the study. * Not having change the time zone or have shifted sleeping hours equivalent to more than 3 hours on the previous 2 weeks. Exclusion Criteria: * Diagnosed with any chronic condition that, in the research team's opinion or based on the American College of Sports Medicine guidelines, could contraindicate the implementation of 34-hour fasting periods and/or high-intensity exercise. * Diagnosed with a chronic endocrine, digestive, rheumatic, neurological, cardiac, pulmonary, autoimmune, or infectious condition that affects energy metabolism. * Presenting any signs or symptoms of illness that, in the research team's opinion or based on the American College of Sports Medicine guidelines, could contraindicate the implementation of 34-hour fasting periods and/or high-intensity exercise. * Pregnant or breastfeeding. * Using medications or supplements that may alter energy metabolism. * Currently undergoing or having undergone any type of nutritional intervention or treatment in the past 3 months. * Engaging in more than 5 hours per week of habitual moderate-to-vigorous cycling. * Any other condition that, in the research team's opinion, discourages participation in the study.

Get updates

Get notified about this study

Sign up to get updates when this study changes or when new studies for Energy metabolism are added.

Vår säkerhetsrekommendation!

Genom att skicka in godkänner du våra Användarvillkor

As listed by the trial registrant

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

Energy metabolism

Contacts and locations

Locations

  • Instiuto Mixto Universitario Deporte y Salud

    Granada, Granada, 18007, Spain

More trials for these conditions

Other studies related to the condition(s) this trial covers.