Clinical trial Recruiting at 1 site Observational Ages 18 and up

How incretin treatments affect muscle mass and function in people with overweight or obesity

Official title: Uncovering the Impact of Incretins on Fat-free Mass, Muscle Strength and Functional Capacity: an Observational Prospective Cohort

Run by Radboud University Medical Center · NCT07929831 · Data updated 2026-11-12

This study will see how drugs like semaglutide and tirzepatide influence fat-free mass, muscle strength, and physical function in adults with overweight or obesity.

More Obesity & Overweight trials

Quick facts

Study typeObservational
Ages18 Years and up
SexAll
Enrollment200 (estimated)
SponsorRadboud University Medical Center
Academic / other
Locations2 sites (Amsterdam and 1 other locations)
StatusRecruiting
StartedAugust 28, 2026
Main results expectedFebruary 1, 2027
Study endsMarch 1, 2027
Registry record updatedNovember 10, 2026
Trial IDNCT07929831 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Adults (18+) with overweight or obesity who are starting or planning to discontinue incretin therapy (e.g., semaglutide or tirzepatide).

Probably not a fit

Individuals who do not use incretin therapies or who have conditions severely limiting physical testing may not experience benefit from this observational study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This observational study follows adults with overweight or obesity who are starting or stopping incretin therapy. Researchers will measure changes in fat-free mass, muscle strength, and physical function at baseline, around six months, and after twelve months or at treatment discontinuation. The goal is to understand the composition of weight loss during treatment and weight regain after stopping, as well as how physical function evolves during the course. The study is conducted at Dutch clinical sites led by Radboud University Medical Center with collaboration from ZonMW. Interventions are not assigned by the study; data are collected from patients as part of routine care.

Why it matters

Potential benefit: If successful, findings could help clinicians tailor incretin therapy to preserve muscle mass and functional ability during weight management.

How similar studies have gone: Prior studies in weight management have explored incretins’ effects on body composition, but this study adds focus on fat-free mass and functional outcomes during initiation and discontinuation.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Screened and planned to start with incretin treatment or currently using incretin and planned to discontinue treatment.
* Aged 18 years or older

Exclusion Criteria:

* Inability to comprehend scheduled procedures (e.g., language barriers)
* Unable to perform the physical tests due to physical disabilities
* Patients who underwent MBS or including endoscopic interventions and gastric balloon placement.
* Prior use of incretins, or other obesity medication.

Where it's running

  • NOK clinics
    Amsterdam, Netherlands
    Recruiting
  • NOK Clinics
    Nieuwegein, Netherlands
    Not yet recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.