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Does Mom's workout change her milk? new study investigates

NCT ID NCT05745922

Knowledge-focused Sponsor: Norwegian University of Science and Technology 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 1 time

Summary

This study looked at how a single session of moderate or high intensity exercise changes the makeup of breast milk in women with overweight or obesity. Thirty-two breastfeeding mothers came to the lab on three separate days: two exercise days and one rest day. Researchers collected milk samples before, right after, and hours later to measure nutrients, hormones, and other compounds. The goal is to understand if exercise alters breast milk composition in this group.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

What this could lead to
If results show exercise changes breast milk composition, it could help guide exercise recommendations for breastfeeding mothers with overweight or obesity.
What could go wrong
This is a small, completed study (32 people) looking at short-term effects only. It does not test health outcomes for mothers or babies, so any benefits are speculative.

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

32 people

The number who actually took part.

Started

Mar 2023

Finished

May 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 years and older

Sex

Female participants only

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: * 6 weeks postpartum * Exclusively breastfeeding * Term birth * Singleton baby Exclusion Criteria: * Known cardiovascular disease * Known type 1 or type 2 diabetes * Limited ability to exercise

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Conditions

The condition(s) this trial relates to.

Breast Milk Expression Motor Activity Obesity obesity disorder Overweight

As listed by the trial registrant

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

Breast milk collection Overweight and obesity

Contacts and locations

Locations

  • Department of circulation and medical imaging , NTNU

    Trondheim, 7491, Norway

More trials for these conditions

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