Exercise Effects on Adipose Tissue Structure and Function in Obesity and Metabolic Syndrome

This study is looking at how exercise affects fat tissue in people with obesity and metabolic conditions. Researchers want to understand how exercise improves health, especially in fat tissue, which could lead to new ways to prevent and treat insulin resistance (when your body doesn't use insulin properly) and obesity-related diseases. You would be assigned to either an exercise group or a group that doesn't exercise. All participants will go through a 10% weight loss program, followed by a high-calorie diet to regain half of the lost weight. The study is looking for 46 participants between 18 and 40 years old with a BMI between 27-45 kg/m2 who don't regularly exercise. Success will be measured by changes in glucose tolerance, fat tissue fibrosis (scarring), and muscle capillarization (blood vessel growth). The current status of the study is unclear.

Study design
This is an interventional study with 46 planned participants. You would be randomly assigned to one of two groups: an exercise group or a no-exercise (control) group.
What's involved
You would undergo a series of metabolic tests before and after a 10% weight loss program, and again after a high-calorie diet to regain half of the lost weight. If in the exercise group, you would complete moderate intensity continuous exercise 4 days/week.
Compensation
Not stated in the trial record.
Follow-up
Primary endpoints are measured at 2 hours and 30 minutes after certain tests. The overall follow-up duration is not specified.

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NCT04812314

Exercise Effects on Adipose Tissue Structure and Function

Recruiting
NAAges 18–40InterventionalBasic science
University of Michigan
~46 participants
Updated 2026-06-04 on ClinicalTrials.gov
What's tested:ExerciseNo exercise

At a glance

Recruiting sites
1 of 1 listed site is recruiting right now
RecruitingSuspended, closed, or not yet open
What they're measuring
Oral Glucose Tolerance Test (OGTT)
Measured over 2 hours
+4 more outcomes measured
Obesity
Metabolic Syndrome
Metabolic Disease
Insulin Resistance
Weight Loss
Weight Gain
1 sites across 1 states
Michigan1
  • Jeffrey F Horowitz, PhD · PRINCIPAL_INVESTIGATOR · University of Michigan, School of Kinesiology

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Eligibility criteria

Inclusion

Age: 18-40
Body Mass Index: 27-45 kg/m2
No regularly planned exercise/physical activity for at least 6 months
Women must have regularly occurring menses and must be premenopausal

Exclusion

Evidence/history of cardiovascular or metabolic disease
Medications known to affect lipid or glucose metabolism, or inflammation
Weight instability ≥ ± 6 pounds in the last 3 months
Tobacco or e-cigarette users
Women must not be pregnant or actively lactating
  • Oral Glucose Tolerance Test (OGTT)2 hours

    A test in which glucose is given and blood samples taken afterward to determine how quickly it is cleared from the blood will be completed at each clinical visit appointment..

  • Adipose Tissue Fibrosis30 minutes

    measured histologically using Sirus Red Staining, quantified using ImageJ software at each clinical visit appointment.

  • Muscle Capillarization30 minutes

    measured immunohistochemically using an antibody for CD31, quantified using ImageJ software at each clinical visit appointment.

  • Adipose Capillarization30 minutes

    measured immunohistochemically using an antibody for CD31, quantified using ImageJ software at each clinical visit appointment.

  • Fat Cell Size3 minutes

    measured histologically using Hematoxylin and eosin (H \& E) staining, quantified using ImageJ software at each clinical visit appointment.