When you run may matter: study tests exercise timing and blood sugar
NCT ID NCT07434349
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study looks at whether exercising before or after breakfast or dinner changes how the body handles blood sugar after meals. Thirty healthy, active adults will run for 45 minutes at different times and wear a continuous glucose monitor. The goal is to see which timing leads to the best blood sugar responses.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- timed endurance exercise
- What this could lead to
- If successful, this could help people plan exercise around meals to better manage blood sugar levels.
- What could go wrong
- This is a small, early-stage study in healthy young adults, so results may not apply to older or less active people. The effect on blood sugar may be small or inconsistent.
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
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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
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About 30 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Apr 2026
- Expected to finish
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Aug 2026
An estimate. End dates often move.
- Lead sponsor
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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
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18 to 35 years
- Sex
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Anyone
- Healthy volunteers
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Accepted
You do not need to have the condition being studied to take part.
Show the full entry requirements Hide 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: * Age 18 to 35 years * Body mass index 18.5 to 24.9 kg per square meter * Able to complete 45 minutes of continuous running at an intensity corresponding to 75 to 85 percent of maximal heart rate without stopping * Engages in regular endurance-type physical activity * Habitual waking times are compatible with the fixed breakfast time of 08:00 * Willing and able to comply with all study procedures, including standardized meals, exercise sessions, behavioral restrictions, and continuous glucose monitoring * For female participants: non-pregnant and using stable hormonal contraception for at least 3 months Exclusion Criteria: * Acute or chronic illness * Metabolic disorders or conditions associated with altered glucose or lipid metabolism * Use of medications known to interfere with glucose metabolism or study outcomes * Intolerance or allergy to components of the standardized study diets * Pregnancy or breastfeeding * Body mass index greater than or equal to 25 kg per square meter * Current or past eating disorder, or any medical condition or medication that could affect appetite regulation, glucose regulation, or make vigorous endurance exercise unsafe * Current smoking or use of nicotine-containing products
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As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
1 site. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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Technical University of Munich
RECRUITINGMünchen, Bavaria, 80809, Germany
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