Overweight and/or Obesity
Conditions
Brief summary
The goal of this randomized controlled trial is to test whether a dual-dimensional 9-grid matrix intervention improves body composition and exercise adherence compared to standard aerobic exercise in overweight/obese college students. The main questions it aims to answer are: Does the 9-grid model optimize fat distribution (measured by waist-hip ratio) and sustain body fat reduction better than traditional exercise? Does dynamic risk stratification in the 9-grid system enhance long-term exercise adherence? How does spatial migration of participants within the grid (quantified by centroid index G) reflect intervention efficacy? Researchers will compare the 9-grid management group (receiving dynamic positioning + 5-tier personalized strategies) to the control group (receiving standardized aerobic exercise) to see if the 9-grid model: Reduces waist-hip ratio more effectively Delays intervention plateau in body fat loss Increases exercise adherence at 8 weeks Participants will: Undergo body measurements (weight, body mass index (BMI), body fat percentage, waist/hip circumference) at baseline, 4 weeks, and 8 weeks Complete the Exercise Adherence Rating Scale (EARS) at 4 and 8 weeks If in 9-grid group: * Be classified into 1 of 9 grid zones every 2 weeks based on waist circumference risk + body fat status * Receive zone-specific interventions (nutrition/exercise/behavioral guidance) If in control group: * Perform progressive aerobic exercise (40-90% heart rate reserve (HR) 3×/week * Use heart rate monitors for intensity tracking
Interventions
BEHAVIORALDynamic Matrix Management for Weight Control (DMM-WC)
Precision weight management using a two-dimensional grid model. Participants undergo bi-weekly positioning on a waist risk-body fat matrix (9 grids), receiving tiered interventions (e.g., high-intensity exercise + dietary control for high-risk grids; maintenance plans for low-risk grids). Real-time progress feedback via visual spatial migration maps promotes adherence. Comparator group receives standardized aerobic prescription without dynamic adjustments.
BEHAVIORALStandard Aerobic Prescription
Personalized progressive aerobic exercise program. Participants receive baseline-adjusted intensity prescriptions (40-90% heart rate reserve), with adherence monitored via wearable devices. NO dynamic adjustments, tiered strategies, or visual feedback are provided throughout the 8-week intervention.
Sponsors
Hainan Normal University
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
DIAGNOSTIC
Masking
TRIPLE (Caregiver, Investigator, Outcomes Assessor)
Eligibility
Sex/Gender
ALL
Age
18 Years to 36 Years
Healthy volunteers
No
Inclusion criteria
1. Age & Status: * Full-time university students aged 18-36 years 2. Overweight/Obesity Diagnosis (per Chinese criteria): * Males: Body Mass Index (BMI) ≥24 kg/m² AND waist circumference ≥85 cm * Females: Body Mass Index (BMI) ≥24 kg/m² AND waist circumference ≥80 cm 3. Exercise Capacity: * Able to safely perform moderate-intensity exercise (confirmed by Physical Activity Readiness Questionnaire \[PAR-Q\], all items No) 4. Tech Compliance: * Own smartphone with proficiency in health apps (e.g., WeChat Sport) 5. Informed Consent: * Signed written consent with commitment to complete 12-week intervention
Exclusion criteria
1. Metabolic Diseases: * Diagnosed diabetes, thyroid dysfunction, or history of cardiovascular disease 2. Exercise Contraindications: * Orthopedic/neurological conditions limiting exercise 3. Confounding Medications: * Use of weight/metabolism-affecting drugs in past 3 months 4. Special Physiological Status: * Pregnancy or lactation 5. Conflicting Participation: * Concurrent enrollment in other weight-management trials
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Change in Waist-to-Hip Ratio (WHR) | Baseline, Week 4, Week 8 | — |
| Body Mass Index (BMI) | Baseline, Week 8 | — |
| Adherence to exercise | Week 4, Week 8 | Exercise adherence will be assessed using the standardized Exercise Adherence Rating Scale (EARS). This validated, self-reported questionnaire comprises 16 items. The first 6 items directly assess participants' behavioral adherence to the prescribed exercise regimen (e.g., session attendance, duration). The subsequent 10 items evaluate reasons for adherence or non-adherence, capturing key cognitive dimensions such as perceived barriers and motivation. All items are rated on a 5-point Likert scale ranging from Completely Agree (scored as 0) to Completely Disagree (scored as 4). Total scores are calculated such that higher scores indicate better exercise adherence. |
| Body Fat Percentage | Baseline, Week 4, Week 8 | — |
Countries
China
Outcome results
None listed