Whole-body high-intensity interval training to improve fitness and body composition in adults with overweight

Is this trial a fit for you?

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

What this trial studies

This in-person study enrolls 40 adults with BMI 25–35 who are allocated to either a supervised whole-body HIIT program or a control group. The intervention consists of 2–3 supervised, small-group sessions per week for 10 weeks using 8–12 body-weight exercises performed at high intensity with short recovery intervals and progression guided by heart rate and perceived exertion. Participants complete comprehensive pre- and post-intervention testing including DXA body composition, fasting blood tests, muscular strength measures, a Chester step test, a maximal graded treadmill test with gas exchange to determine VO2peak, and functional evaluations. All training and assessments are conducted on site under exercise-professional supervision.

Why it matters

Who can join: the full rules

Inclusion Criteria:

* Adults aged 18 to 55 years.
* Body mass index (BMI) between 25 and 35 kg/m².
* Able to provide written informed consent.
* Able to safely participate in high-intensity interval training.
* For participants with BMI \> 30 kg/m²: medical clearance from their general practitioner.

Exclusion Criteria:

* BMI \< 25 or \> 35 kg/m².
* Presence of any chronic medical condition other than overweight/obesity.
* Known cardiovascular, metabolic, respiratory, or musculoskeletal disease that contraindicates high-intensity exercise.
* Pregnancy.
* Inability to perform exercise testing or complete the WB-HIIT program.
* Any condition judged by investigators to interfere with participation or data interpretation.

Where it's running

• Université libre de Bruxelles (ULB)
  Brussels, Belgium Recruiting

Study contacts

• Study coordinator: Julie Carpentier, PhD
• Email: julie.carpentier@ulb.be
• Phone: +3225553859

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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.