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Exercise-induced weight loss preferentially reduces abdominal fat
Melissa J Mayo1, Justin R Grantham, Govindasamy Balasekaran
1Physical Education and Sports Sciences, National Institute of Education, Nanyang Technological University, Singapore. themayos@emirates.net.ae
Medicine and Science in Sports and Exercise
|February 6, 2003
Summary
Exercise-induced weight loss in obese men significantly reduced abdominal fat, particularly waist circumference, while preserving lean body mass. This preferential fat loss may lower disease risk and prevent weight regain.
Area of Science:
- Exercise Physiology
- Obesity Research
- Body Composition Analysis
Background:
- Obesity is a significant health concern, particularly in young adults.
- Understanding the impact of exercise on body composition is crucial for effective weight management.
- Abdominal fat accumulation is linked to increased metabolic disease risk.
Purpose of the Study:
- To determine if substantial weight loss through exercise reduces abdominal fat in young obese men.
- To assess changes in body composition, including fat mass and fat-free mass (FFM), following a regimented training program.
Main Methods:
- Thirty obese men underwent a 4-month military training program.
- Body composition (FFM, fat mass, percent body fat) was measured using skinfold assessments before and after training.
- A control group of 30 obese men without training was monitored.
- Paired t-tests analyzed pre- and post-training differences.
Main Results:
- Participants lost an average of 12.0 kg, primarily due to fat mass reduction (P < 0.001), with no change in FFM.
- Waist circumference (WC) and hip circumference (HC) decreased significantly (P < 0.01).
- The reduction in WC (13.7%) was greater than HC (7.7%), leading to a significant decrease in waist-to-hip ratio (WHR; P < 0.001).
Conclusions:
- Substantial weight loss achieved through exercise preferentially reduces abdominal fat.
- Exercise-induced weight loss helps maintain fat-free mass (FFM) in obese men.
- This preferential loss of abdominal fat may reduce associated disease risks and mitigate weight regain.