AzTrials
AzTrials

Gestational Diabetes Mellitus With Baby DeliveredTRE-HIITmomsNCT07776886

Time-restricted Eating and High-intensity Interval Training After Gestational Diabetes

A study testing Time-restricted eating and exercise in people with Gestational Diabetes Mellitus With Baby Delivered, run by Norwegian University of Science and Technology at 1 site in Norway.

Not yet recruiting

Opening soon. The study is approved but enrolment has not started yet. Sites may already take enquiries.

Sites and contacts
Official record
Search all trials

Trial summary

This trial will recruit participants who had gestational diabetes in their most previous pregnancy. Participants will be randomly allocated into two groups: one intervention group and one control group 6-12 weeks after giving birth. Read more about this study

Who is it for?
Ages 18 to 50 years, women only
What is being tested?
Time-restricted eating and exercise
Could I receive a placebo?
No, everyone receives an active treatment
How many people
56 participants
Where
1 siteNorway
Study dates
1 Nov 2026to Jan 2029
Phase
Interventional
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 to 50 years
  • Women only
  • No healthy volunteers
  • Adult

Who may be able to join

  • Gestational diabetes mellitus in most recent pregnancy
  • Within 6-12 weeks postpartum
  • Understands oral and written Norwegian or English
  • Able to walk or run on a treadmill or ride a bike for at least 60 minutes
  • Living in the Trondheim area

Who cannot join

  • Pregnant or trying to become pregnant
  • Diagnosed with type 1 or type 2 diabetes
  • Diagnosed with cardiovascular disease
  • Have a history of eating disorders (anorexia, bulimia, or binge eating disorder)
  • Habitual eating window of less than 12 hours/day
  • Engaging in regular high-intensity endurance training (once per week or more)
Show all 10Show fewer
  • Intention of starting an exercise programme and/or a dietary strategy within the study period
  • Shift work that includes night shifts
  • Bariatric surgery
  • Any other reason which, according to the researchers, makes the potential participant ineligible

Trial locations and contacts

1 site in 1 country. Contact the study team or a site near you to ask about taking part.

Trine Moholdt, PhD contact

+4797098594

trine.moholdt@ntnu.no

Beathe Sitter, PhD contact

+4799024180

beathe.sitter@ntnu.no

Norway1 site
  • Department of Circulation and Medical Imaging

    Trondheim, 7491

    Trine Moholdt, PhD, +4797098594, trine.moholdt@ntnu.no

    Beathe Sitter, PhD, +4799024180, beathe.sitter@ntnu.no

Other trials in Norway

About this study

Official title: Time-restricted Eating and High-intensity Interval Training After Gestational Diabetes (TRE-HIIT Moms)

This trial will recruit participants who had gestational diabetes in their most previous pregnancy. Participants will be randomly allocated into two groups: one intervention group and one control group 6-12 weeks after giving birth. The intervention group will undergo an 8-week supervised intervention consisting of time-restricted eating and endurance exercise training with moderate-to-high intensity. The investigators will assess cardiorespiratory fitness, body composition, and other markers of cardiovascular and metabolic health before and after the 8 weeks. Additionally, the participants in the intervention group will be encouraged to continue exercising and eating time restricted after the supervised period and follow them up by telephone until one year from the baseline visit. The investigators will measure the same outcomes at the follow-up as on the previous two test points.

Read the detailed description

TREHIIT Moms is a randomised, controlled trial with two parallel groups. To be eligible for the trial, the participants need to have had gestational diabetes in their most previous pregnancy and be 6-12 weeks postpartum at inclusion. Participants will be randomly allocated to intervention or control (1:1). The intervention consist of time-restricted eating and endurance exercise. Time-restricted eating implies restricting energy intake to a maximum 10-hour time window daily. The exercise training will be supervised and consist of 2-4 weekly sessions of moderate-to-high intensity exercise. After the supervised period, the participants will continue high-intensity exercise and time-restricted eating at home, with follow-up from the researchers until 1 year from baseline.

The investigators will assess cardiometabolic health outcomes and psychological well-being at baseline, after 8 weeks, and 1 year. Human milk samples will be collected at baseline and 8 weeks and stored for future exploratory analyses of milk composition. The specific analytes and analytical methods will be determined in subsequent exploratory studies and are not prespecified trial outcomes

Being tested
Time-restricted eating and exercise
Keywords
Exercise, Time-restricted eating, High-intensity interval training
Medical subject headings
Motor Activity, Intermittent Fasting

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Time-restricted eating and exerciseBehavioural

    Also called Diet, Exercise

    The intervention is a combination of time-restricted eating and endurance exercise training. Time-restricted eating implies that the participants will be asked to limit their energy intake to a maximum 10-hour time window daily. The endurance exercise programme consists of 2-4 weekly supervised exercise sessions for 8 weeks. Thereafter, the participants will continue exercising unsupervised with weekly follow-up from researchers.

Study groups in NCT07776886
Study groupRoleWhat they receive
InterventionExperimentalTime-restricted eating and high-intensity interval training
Receives: Behavioral: Time-restricted eating and exercise
ControlNo interventionNo intervention administered

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Peak oxygen uptake

    Direct measurement of oxygen uptake during graded maximal exercise test to exhaustion

    Measured: From baseline to after 8 weeks

Secondary outcomes (52)
  1. Peak oxygen uptake

    Direct measurement of oxygen uptake during graded maximal exercise test to exhaustion

    Measured: From baseline to after 12 months

  2. Body mass

    Estimated by bioimpedance scale

    Measured: From baseline to after 8 weeks

  3. Body mass

    Estimated by bioimpedance scale

    Measured: From baseline to after 12 months

  4. Fat mass

    Estimated by bioimpedance scale

    Measured: From baseline to after 8 weeks

  5. Fat mass

    Estimated by bioimpedance scale

    Measured: From baseline to after 12 months

  6. Muscle mass

    Estimated by bioimpedance scale

    Measured: From baseline to after 8 weeks

  7. Muscle mass

    Estimated by bioimpedance scale

    Measured: From baseline to after 12 months

  8. Visceral fat area

    Estimated by bioimpedance scale

    Measured: From baseline to after 8 weeks

  9. Visceral fat area

    Estimated by bioimpedance scale

    Measured: From baseline to after 12 months

  10. Bone mass

    Estimated by bioimpedance scale

    Measured: From baseline to after 8 weeks

  11. Bone mass

    Estimated by bioimpedance scale

    Measured: From baseline to after 12 months

  12. Waist circumference

    Measured by measuring tape at the level of the umbilicus

    Measured: From baseline to after 8 weeks

  13. Waist circumference

    Measured by measuring tape at the level of the umbilicus

    Measured: From baseline to after 12 months

  14. Systolic blood pressure

    Measured by automatic blood pressure cuff

    Measured: From baseline to after 8 weeks

  15. Systolic blood pressure

    Measured by automatic blood pressure cuff

    Measured: From baseline to after 12 months

  16. Diastolic blood pressure

    Measured by automatic blood pressure cuff

    Measured: From baseline to after 8 weeks

  17. Diastolic blood pressure

    Measured by automatic blood pressure cuff

    Measured: From baseline to after 12 months

  18. Resting heart rate

    Measured by automatic blood pressure cuff

    Measured: From baseline to after 8 weeks

  19. Resting heart rate

    Measured by automatic blood pressure cuff

    Measured: From baseline to after 12 months

  20. Blood cholesterol

    Venous blood sampling

    Measured: From baseline to after 8 weeks

  21. Blood cholesterol

    Venous blood sampling

    Measured: From baseline to after 12 months

  22. LDL cholesterol

    Venous blood sampling

    Measured: From baseline to after 8 weeks

  23. LDL cholesterol

    Venous blood sampling

    Measured: From baseline to after 12 months

  24. HDL cholesterol

    Venous blood sampling

    Measured: From baseline to after 8 weeks

  25. HDL cholesterol

    Venous blood sampling

    Measured: From baseline to after 12 months

  26. Triglycerides

    Venous blood sampling

    Measured: From baseline to after 8 weeks

  27. Triglycerides

    Venous blood sampling

    Measured: From baseline to after 12 months

  28. Fasting glucose

    Venous blood sampling

    Measured: From baseline to after 8 weeks

  29. Fasting glucose

    Venous blood sampling

    Measured: From baseline to after 12 months

  30. Insulin C-peptide

    Venous blood sampling

    Measured: From baseline to after 8 weeks

  31. Insulin C-peptide

    Venous blood sampling

    Measured: From baseline to after 12 months

  32. Plasma glucose after oral glucose tolerance test

    Venous blood sampling 120 minutes after ingesting 75 gram glucose

    Measured: From baseline to after 8 weeks

  33. Plasma glucose after oral glucose tolerance test

    Venous blood sampling 120 minutes after ingesting 75 gram glucose

    Measured: From baseline to after 12 months

  34. Dietary intake

    Self-reported dietary intake using electronic application

    Measured: From baseline to after 8 weeks

  35. Dietary intake

    Self-reported dietary intake using electronic application

    Measured: From baseline to after 12 months

  36. Mean Daily Minutes of Moderate-to-Vigorous Physical Activity Measured by ActiGraph Accelerometer

    Participants will wear an ActiGraph accelerometer for 7 consecutive days. Moderate-to-vigorous physical activity will be determined using prespecified accelerometer count thresholds. For each participant, the total number of minutes classified as moderate-to-vigorous physical activity will be calculated for each valid wear day and averaged across all valid wear days. The reported value will be mean minutes of moderate-to-vigorous physical activity per day.

    A valid day will be defined as at least 10 hours of accelerometer wear, and participants must have at least 4 valid days to be included in the analysis.

    Measured: From baseline to after 8 weeks

  37. Mean Daily Minutes of Moderate-to-Vigorous Physical Activity Measured by ActiGraph Accelerometer

    Participants will wear an ActiGraph accelerometer for 7 consecutive days. Moderate-to-vigorous physical activity will be determined using prespecified accelerometer count thresholds. For each participant, the total number of minutes classified as moderate-to-vigorous physical activity will be calculated for each valid wear day and averaged across all valid wear days. The reported value will be mean minutes of moderate-to-vigorous physical activity per day.

    A valid day will be defined as at least 10 hours of accelerometer wear, and participants must have at least 4 valid days to be included in the analysis.

    Measured: From baseline to after 12 months

  38. Self-reported physical activity

    International Physical Activity Questionnaire

    Measured: From baseline to after 8 weeks

  39. Self-reported physical activity

    International Physical Activity Questionnaire

    Measured: From baseline to after 12 months

  40. Psychological wellbeing

    World Health Organization Five Well-Being Index (WHO-5). The World Health Organization Five Well-Being Index (WHO-5) is a 5-item self-report questionnaire assessing subjective psychological well-being over the previous 2 weeks. Raw scores are transformed to a scale ranging from 0 to 100 by multiplying the total raw score by 4. Higher scores indicate better well-being.

    Measured: From baseline to after 8 weeks

  41. Psychological wellbeing

    World Health Organization Five Well-Being Index (WHO-5). The World Health Organization Five Well-Being Index (WHO-5) is a 5-item self-report questionnaire assessing subjective psychological well-being over the previous 2 weeks. Raw scores are transformed to a scale ranging from 0 to 100 by multiplying the total raw score by 4. Higher scores indicate better well-being.

    Measured: From baseline to after 12 months

  42. Sleep quality

    Pittsburgh Sleep Quality Index questionnaire global score. The Pittsburgh Sleep Quality Index (PSQI) is a 19-item self-report questionnaire that assesses sleep quality over the previous month. The global PSQI score ranges from 0 to 21, with higher scores indicating worse sleep quality.

    Measured: From baseline to after 8 weeks

  43. Sleep quality

    Pittsburgh Sleep Quality Index questionnaire global score. The Pittsburgh Sleep Quality Index (PSQI) is a 19-item self-report questionnaire that assesses sleep quality over the previous month. The global PSQI score ranges from 0 to 21, with higher scores indicating worse sleep quality.

    Measured: From baseline to after 12 months

  44. Depression

    The Edinburgh Postnatal Depression Scale (EPDS) global score. The Edinburgh Postnatal Depression Scale is a 10-item self-report questionnaire that assesses symptoms of depression over the previous 7 days. The total score ranges from 0 to 30, with higher scores indicating more severe depressive symptoms.

    Measured: From baseline to 8 weeks

  45. Depression

    The Edinburgh Postnatal Depression Scale (EPDS) global score. The Edinburgh Postnatal Depression Scale is a 10-item self-report questionnaire that assesses symptoms of depression over the previous 7 days. The total score ranges from 0 to 30, with higher scores indicating more severe depressive symptoms.

    Measured: From baseline to after 12 months

  46. Anxiety

    Generalised anxiety disorder questionnaire (GAD-7) total score. The Generalized Anxiety Disorder 7-Item (GAD-7) is a 7-item self-report questionnaire that assesses symptoms of generalized anxiety over the previous 2 weeks. The total score ranges from 0 to 21, with higher scores indicating more severe anxiety symptoms.

    Measured: From baseline to after 8 weeks

  47. Anxiety

    Generalised anxiety disorder questionnaire (GAD-7) total score. The Generalized Anxiety Disorder 7-Item (GAD-7) is a 7-item self-report questionnaire that assesses symptoms of generalized anxiety over the previous 2 weeks. The total score ranges from 0 to 21, with higher scores indicating more severe anxiety symptoms.

    Measured: From baseline to after 12 months

  48. Type 2 diabetes mellitus diagnosis

    Participant-reported or measurement of HbA1c of 48 mmol/mol or above

    Measured: During the 12-month follow-up

  49. Mean Daily Step Count Measured by ActiGraph Accelerometer

    Participants will wear an ActiGraph accelerometer for 7 consecutive days. The number of steps recorded on each valid wear day will be averaged across all valid wear days for each participant. A valid day will be defined as at least 10 hours of accelerometer wear, and at least 4 valid days will be required.

    Measured: From baseline to after 8 weeks

  50. Mean Daily Sedentary Time Measured by ActiGraph Accelerometer

    Participants will wear an ActiGraph accelerometer for 7 consecutive days. Sedentary time will be identified using a prespecified accelerometer count threshold. Minutes classified as sedentary will be calculated for each valid wear day and averaged across all valid wear days for each participant. A valid day will be defined as at least 10 hours of accelerometer wear, and at least 4 valid days will be required.

    Measured: At baseline and after 8 weeks

  51. Mean Daily Step Count Measured by ActiGraph Accelerometer

    Participants will wear an ActiGraph accelerometer for 7 consecutive days. The number of steps recorded on each valid wear day will be averaged across all valid wear days for each participant. A valid day will be defined as at least 10 hours of accelerometer wear, and at least 4 valid days will be required.

    Measured: From baseline to after 12 months

  52. Mean Daily Sedentary Time Measured by ActiGraph Accelerometer

    Participants will wear an ActiGraph accelerometer for 7 consecutive days. Sedentary time will be identified using a prespecified accelerometer count threshold. Minutes classified as sedentary will be calculated for each valid wear day and averaged across all valid wear days for each participant. A valid day will be defined as at least 10 hours of accelerometer wear, and at least 4 valid days will be required.

    Measured: From baseline to after 12 months

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted20 Aug 2026
  2. Study start1 Nov 2026 (estimated)
  3. Primary completionDec 2028 (estimated)
  4. Study completionJan 2029 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase N/A
Primary purpose
Prevention
Allocation
Randomised
Intervention model
Parallel groups
Masking
None (open label)
Enrolment
56 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT07776886
Sponsor's protocol ID
987380
Acronym
TRE-HIITmoms
Status last verified
Oct 2026
First submitted
3 Jul 2026
Last updated
15 Oct 2026
Results posted
No
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
Yes: We will make de-identified individual participant data (IPD) collected in the study available to other researchers. We will upload a data set in an open access repository. We will only share IPD that cannot be used to identify individuals.

Questions about this trial

What is this clinical trial studying?

A study testing Time-restricted eating and exercise in people with Gestational Diabetes Mellitus With Baby Delivered, run by Norwegian University of Science and Technology at 1 site in Norway.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 5 inclusion and 10 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: opening soon, as of the sponsor's last update on 15 Oct 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in Norway. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

Contact Trine Moholdt, PhD (+4797098594, trine.moholdt@ntnu.no), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Peak oxygen uptake (time frame: From baseline to after 8 weeks). It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 15 Oct 2026.

Free account

Keep searching with a free account

You’ve used your 3 free searches for this session. Log in or create a free AzTrials account to keep searching clinical trials and save the ones you want to follow.

Create a free accountLog in