Exercise Effects on Adipose Tissue Structure and Function (LG)

University of Michigan

Status: Enrolling

Conditions: Weight Loss; Weight Gain; Insulin Resistance; Obesity; Metabolic Disease; Metabolic Syndrome

Treatments: Behavioral: Exercise; Behavioral: No exercise

Study type: Interventional

Funder types: Other

Identifiers

NCT04812314

HUM00175528

Details and patient eligibility

About

Participants will be randomized into one of two different experimental groups: 1) Exercise group and 2) No exercise (control group). Subject participation in the study will involve a series of metabolic tests before and after participants undergo a 10% weight loss program (with or without exercise training depending on group randomization). After completing this weight loss portion of the study, participants will then be required to adhere to a high calorie diet program to regain half of the weight the participant lost - followed by the same series of metabolic tests.

Full description

Exercise is among the first line treatments for obesity and obesity-related diseases, yet it is shocking how little is known about how exercise works to improve health. Expanding the knowledge about novel exercise-induced adaptations in fat tissue of obese individuals and furthering the understanding about mechanisms underlying these adaptations could lead to innovative approaches for preventing and treating insulin resistance and obesity-related diseases.

Overall, the researchers believe that exercise training modifies key processes in subcutaneous fat tissue that may contribute to an increase body fat storage capacity (without increasing fat mass). The research team anticipates that exercise will evoke an even more potent adaptive response when fat tissue is dynamically changing in response to alterations in nutritional status (i.e., weight loss and weight regain).

Participants will be randomized into one of two different experimental groups: 1) Exercise group and 2) No exercise (control group). Subject participation in the study will involve a series of metabolic tests before and after participants undergo a 10% weight loss program (with or without exercise training depending on group randomization). After completing this weight loss portion of the study, participants will then be required to adhere to a high calorie diet program to regain half of the weight the participant lost - followed by the same series of metabolic tests. After the participant completes the study, the study team will help the participant to lose more weight. Total involvement in the study for each participant will likely be about 8-10 months.

Enrollment: 46 estimated patients

Sex: All

Ages: 18 to 40 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• 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 criteria

• 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

Trial design

Primary purpose: Basic Science

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: None (Open label)

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46 participants in 2 patient groups

Exercise

Experimental group

Description:

This exercise prescription represents a common or "conventional" form of physical activity (e.g., moderate/brisk walking). If assigned to this group, participants will perform 45 minutes of moderate intensity continuous steady-state exercise at 70% maximal heart rate (HRmax) to expend 250 calories 4 days per week.

Treatment:

Behavioral: Exercise

No exercise

Experimental group

Description:

Subjects assigned to this group are to remain sedentary (no planned physical exercise) throughout the duration of the study.

Treatment:

Behavioral: No exercise