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Can four minutes of hard exercise match a longer workout for blood sugar?

NCT ID NCT07829042

Knowledge-focused Sponsor: University of California, San Francisco 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 This study
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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Sep 18, 2026 · Last updated Sep 18, 2026

Summary

Researchers at the University of California, San Francisco are testing whether short bursts of high-intensity exercise control blood sugar as well as longer, moderate workouts. The study enrolls 12 non-diabetic or pre-diabetic adults who wear a continuous glucose monitor for 11 days. Each participant completes both a five-day Zone 2 aerobic routine and a single high-intensity interval training session, in random order. The team compares average glucose levels and time spent in a healthy range during and after each exercise block.

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 interval training (HIIT) and moderate-intensity Zone 2 aerobic exercise
What this could lead to
If short bursts of intense exercise control blood sugar as well as longer moderate workouts, people at risk of diabetes could get similar benefits with less time spent exercising.
What could go wrong
The study is very small, with only 12 participants, and it measures blood sugar over days rather than long-term health outcomes. Results may not apply to people with diabetes or to other exercise routines.

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

About 12 people

The number the study aims to enrol. It can still change while the study runs.

Expected to start

Sep 2026

An estimate. Start dates often move.

Expected to finish

Oct 2026

An estimate. End dates often move.

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 years and older

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: Age 18 years or older. Non-diabetic or pre-diabetic status (defined by medical history or standard screening criteria, e.g., HbA1c \< 6.5%). Capable and willing to participate in both Zone 2 aerobic exercise and high-intensity interval training (HIIT) protocols. Willing to wear a continuous glucose monitor (Dexcom G7) continuously for the 11-day study duration. Able to provide written informed consent. Exclusion Criteria: Diagnosis of Type 1 or Type 2 diabetes. Use of glucose-lowering medications, insulin, or other pharmaceuticals that significantly alter glucose metabolism. Current skin conditions, allergies, or sensitivities to medical-grade adhesives that prevent continuous glucose monitor placement. Musculoskeletal, cardiovascular, or neurological conditions that contraindicate vigorous exercise or high-intensity interval training. Pregnant or planning to become pregnant during the study period. Concurrent participation in another clinical trial or interventional exercise study.

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Conditions

The condition(s) this trial relates to.

prediabetes syndrome

As listed by the trial registrant

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

Glucose control

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. 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

  • University of California, San Francisco

    San Francisco, California, 94143, United States

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