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Hot workout: new study reveals how heat changes blood sugar in type 1 diabetes

NCT ID NCT07341243

Knowledge-focused Sponsor: Liverpool John Moores University Source: ClinicalTrials.gov ↗

What the study statuses mean

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Recruitment status, easiest to join first

Recruiting now This study
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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 27, 2026 · Last updated Jun 27, 2026

Summary

This study looks at how exercising in hot conditions (40°C) changes blood sugar levels in people with type 1 diabetes compared to a normal temperature (20°C). 38 adults who have had type 1 diabetes for over a year and exercise regularly will do 40 minutes of moderate exercise in both conditions. The goal is to understand how heat affects glucose use during and after exercise, which could help people with diabetes manage their blood sugar better.

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 38 people

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

Started

Nov 2025

Expected to finish

Nov 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 to 65 years

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

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: * T1D diagnosis more than 1 years ago (to ensure participants are out of the honeymoon period) * Using insulin therapy with multiple daily injections (MDI), insulin pump (pump), or hybrid closed-loop (HCL) o If using a HCL system have experience of using a pre-programmed basal rate in manual mode during exercise * Aged 18-65 years * Regularly engaged in endurance exercise (training at least twice per week for ≥30 minutes per session) Exclusion Criteria: * Pregnancy * \<6 months postpartum or stopped breastfeeding \<1 month before recruitment * Existing cerebrovascular or cardiovascular disease * Significant history of hyperglycaemia (HbA1c \>85 mmol/mol) * History of severe hypoglycaemia requiring third party assistance within the last 3 months * Body weight \<36.5kg * Difficulty swallowing tablets * Appointment for an MRI test that cannot be rescheduled * Obstructive gastrointestinal disease * History of gastrointestinal surgery * Have an implanted medical device

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Conditions

The condition(s) this trial relates to.

Motor Activity type 1 diabetes mellitus

As listed by the trial registrant

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

Type 1 diabetes (T1D)

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

  • Liverpool John Moores University

    RECRUITING

    Liverpool, L33AF, United Kingdom

More trials for these conditions

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