Department of Cardiology, Houston Methodist Research Institute and Baylor College of Medicine, Houston, Texas, USA
Changes in regional body composition over 8 years in a randomized lifestyle trial: The look AHEAD study
- Published on Jul 28 2016
Objective: To test the hypothesis that an 8-year intensive lifestyle intervention (ILI) suppresses aging-dependent changes in regional lean mass (LM) and fat mass (FM) among people with overweight/obesity and type 2 diabetes.
Methods: Regional body composition was measured by dual-energy X-ray absorptiometry within a subset of 1,019 volunteers (45–75 years old) in the Look AHEAD study randomized to ILI or diabetes support and education (DSE). The ILI goal was to achieve and maintain ≥7% weight loss through increased physical activity and reduced caloric intake.
Results: Over 8 years, the DSE group exhibited a linear loss of LM and FM. During year 1, the ILI group lost LM and FM. Between years 1 and 8, the ILI group regained most FM in all regions; regional LM converged with that of the DSE group; the percent of LM loss was greater for the leg than for the trunk. Among both groups, regional LM and FM change was proportional to the size of the region, trunk > leg > arm.
Conclusions: Aging-dependent LM losses, particularly in the leg region, were not suppressed by ILI. The long-term consequences of rapid LM and FM loss and subsequent regain mostly as fat are unknown.
- Henry J. Pownall 1
- Ann V. Schwartz 2
- George A. Bray 3
- Robert I. Berkowitz 4
- Cora E. Lewis 5
- Edward J. Boyko 6
- John M. Jakicic 7
- Haiying Chen 8
- Stanley Heshka 9
- Edward W. Gregg 10
- Karen C. Johnson 11
- Look AHEAD Research Group
Department of Epidemiology and Biostatistics, University of California, San Francisco, California, USA
Department of Clinical Obesity and Metabolism, Pennington Biomedical Research Center/LSU, Baton Rouge, Louisiana, USA
Department of Child and Adolescent Psychiatry and Behavioral Science, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA
Division of Preventive Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA
Department of Internal Medicine, VA Puget Sound Health Care System and University of Washington, Seattle, Washington, USA
Department of Health and Physical Activity, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
Department of Biostatistics, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
Institute of Human Nutrition, St. Luke's/Roosevelt Hospital, New York, New York, USA
Division of Diabetes Translation, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
Department of Preventive Medicine, University of Tennessee, Memphis, Tennessee, USA
Obesity a Research Journal