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Effect of an 18-month physical activity and weight loss intervention on body composition in overweight and obese older adults.
Obesity (Silver Spring). 2014 Feb; 22(2):325-31.O

Abstract

OBJECTIVE

Our primary objective was to determine the long-term effects of physical activity (PA) and weight loss (WL) on body composition in overweight/obese older adults. Secondarily, the association between change in body mass and composition on change in several cardiometabolic risk factors and mobility was evaluated.

DESIGN AND METHODS

288 older (X ± SD: 67.0 ± 4.8 years), overweight/obese (BMI 32.8 ± 3.8 kg/m²) men and women participated in this 18-month randomized, controlled trial. Treatment groups included PA + WL (n = 98), PA-only (n = 97), and a successful aging (SA) health education control (n = 93). DXA-acquired body composition measures (total body fat and lean mass), conventional biomarkers of cardiometabolic risk, and 400-m walk time were obtained at baseline and 18 months.

RESULTS

Fat mass was significantly reduced from (X ± SE) 36.5 ± 8.9 kg to 31.7 ± 9.0 kg in the PA + WL group (p < 0.01), but remained unchanged from baseline in the PA-only (-0.8 ± 3.8 kg) and SA (-0.0 ± 3.9 kg) group. Lean mass losses were three times greater in the PA + WL groups compared to PA-only or SA groups (-2.5 ± 2.8 kg vs. -0.7 ± 2.2 kg or -0.8 ± 2.4 kg, respectively; p < 0.01); yet due to a larger decrease in fat mass, percent lean mass was significantly increased over baseline in the PA + WL groups (2.1% ± 2.6%; p < 0.01). Fat mass loss was primarily responsible for WL-associated improvements in cardiometabolic risk factors, while reduction in body weight, regardless of compartment, was significantly associated with improved mobility.

CONCLUSION

This 18-month PA + WL program resulted in a significant reduction in percent body fat with a concomitant increase in percent body lean mass. Shifts in body weight and composition were associated with favorable changes in clinical parameters of cardiometabolic risk and mobility. Moderate PA without WL had no effect on body composition.

Authors+Show Affiliations

Department of Health and Exercise Science, Wake Forest University, Winston-Salem, North Carolina, USA.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Randomized Controlled Trial
Research Support, N.I.H., Extramural

Language

eng

PubMed ID

23963786

Citation

Beavers, Kristen M., et al. "Effect of an 18-month Physical Activity and Weight Loss Intervention On Body Composition in Overweight and Obese Older Adults." Obesity (Silver Spring, Md.), vol. 22, no. 2, 2014, pp. 325-31.
Beavers KM, Beavers DP, Nesbit BA, et al. Effect of an 18-month physical activity and weight loss intervention on body composition in overweight and obese older adults. Obesity (Silver Spring). 2014;22(2):325-31.
Beavers, K. M., Beavers, D. P., Nesbit, B. A., Ambrosius, W. T., Marsh, A. P., Nicklas, B. J., & Rejeski, W. J. (2014). Effect of an 18-month physical activity and weight loss intervention on body composition in overweight and obese older adults. Obesity (Silver Spring, Md.), 22(2), 325-31. https://doi.org/10.1002/oby.20607
Beavers KM, et al. Effect of an 18-month Physical Activity and Weight Loss Intervention On Body Composition in Overweight and Obese Older Adults. Obesity (Silver Spring). 2014;22(2):325-31. PubMed PMID: 23963786.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effect of an 18-month physical activity and weight loss intervention on body composition in overweight and obese older adults. AU - Beavers,Kristen M, AU - Beavers,Daniel P, AU - Nesbit,Beverly A, AU - Ambrosius,Walter T, AU - Marsh,Anthony P, AU - Nicklas,Barbara J, AU - Rejeski,W Jack, Y1 - 2013/09/20/ PY - 2013/05/03/received PY - 2013/08/14/revised PY - 2013/08/15/accepted PY - 2013/8/22/entrez PY - 2013/8/22/pubmed PY - 2014/10/8/medline SP - 325 EP - 31 JF - Obesity (Silver Spring, Md.) JO - Obesity (Silver Spring) VL - 22 IS - 2 N2 - OBJECTIVE: Our primary objective was to determine the long-term effects of physical activity (PA) and weight loss (WL) on body composition in overweight/obese older adults. Secondarily, the association between change in body mass and composition on change in several cardiometabolic risk factors and mobility was evaluated. DESIGN AND METHODS: 288 older (X ± SD: 67.0 ± 4.8 years), overweight/obese (BMI 32.8 ± 3.8 kg/m²) men and women participated in this 18-month randomized, controlled trial. Treatment groups included PA + WL (n = 98), PA-only (n = 97), and a successful aging (SA) health education control (n = 93). DXA-acquired body composition measures (total body fat and lean mass), conventional biomarkers of cardiometabolic risk, and 400-m walk time were obtained at baseline and 18 months. RESULTS: Fat mass was significantly reduced from (X ± SE) 36.5 ± 8.9 kg to 31.7 ± 9.0 kg in the PA + WL group (p < 0.01), but remained unchanged from baseline in the PA-only (-0.8 ± 3.8 kg) and SA (-0.0 ± 3.9 kg) group. Lean mass losses were three times greater in the PA + WL groups compared to PA-only or SA groups (-2.5 ± 2.8 kg vs. -0.7 ± 2.2 kg or -0.8 ± 2.4 kg, respectively; p < 0.01); yet due to a larger decrease in fat mass, percent lean mass was significantly increased over baseline in the PA + WL groups (2.1% ± 2.6%; p < 0.01). Fat mass loss was primarily responsible for WL-associated improvements in cardiometabolic risk factors, while reduction in body weight, regardless of compartment, was significantly associated with improved mobility. CONCLUSION: This 18-month PA + WL program resulted in a significant reduction in percent body fat with a concomitant increase in percent body lean mass. Shifts in body weight and composition were associated with favorable changes in clinical parameters of cardiometabolic risk and mobility. Moderate PA without WL had no effect on body composition. SN - 1930-739X UR - https://www.unboundmedicine.com/medline/citation/23963786/Effect_of_an_18_month_physical_activity_and_weight_loss_intervention_on_body_composition_in_overweight_and_obese_older_adults_ L2 - https://doi.org/10.1002/oby.20607 DB - PRIME DP - Unbound Medicine ER -