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Aerobic exercise, lipids and lipoproteins in overweight and obese adults: a meta-analysis of randomized controlled trials

International Journal of Obesity volume 29, pages 881–893 (2005)Cite this article

Abstract

OBJECTIVE:

Use the meta-analytic approach to examine the effects of aerobic exercise on lipids and lipoproteins in overweight and obese adults.

DATA SOURCES:

(1) Computerized literature searches, (2) cross-referencing from review and original articles, (3) hand searching, and (4) expert review of reference list.

STUDY SELECTION:

(1) randomized controlled trials, (2) aerobic exercise ≥8 weeks, (3) adult humans ≥18 y of age, (4) all subjects overweight or obese (BMI ≥25 kg/m2), (5) studies published in journal, dissertation, or master's thesis format, (6) studies published in the English-language, (7) studies published between 1 January 1955 and 1 January 2003, (8) assessment of one or more of the following lipid and/or lipoprotein variables: total cholesterol (TC), high-density lipoprotein cholesterol (HDL), low-density lipoprotein cholesterol (LDL), and triglycerides (TG).

DATA ABSTRACTION:

Dual-coding by the first two authors (inter-rater agreement=0.96).

RESULTS:

In total, 13 studies representing 31 groups (17 exercise, 14 control), 613 subjects (348 exercise, 265 control), and up to 17 outcomes were available for pooling. Across all categories, random-effects modeling resulted in statistically significant improvements for TC (X̄±s.e.m., − 3.4±1.7 mg/dl, 95% CI, − 6.7 to − 0.2 mg/dl) and TG (X̄±s.e.m., − 16.1±7.3 mg/dl, 95% CI, − 30.2 to − 2.1 mg/dl) but not HDL (X̄±s.e.m., 1.6±0.8 mg/dl, 95% CI, − 0.02 to 3.2 mg/dl) or LDL (X̄±s.e.m., − 0.5±1.3 mg/dl, 95% CI, − 3.0 to 2.0 mg/dl). Changes were equivalent to improvements of 2% (TC), 11% (TG), 3% (HDL), and 0.3% (LDL). After conducting sensitivity analyses (each study deleted from the model once), only decreases in TG remained statistically significant. Increases in HDL were associated with increases in maximum oxygen consumption (VO2 max in ml/kg/min, r=0.75, P=0.002) and decreases in body weight (r=0.77, P<0.001), while decreases in LDL were associated with decreases in body weight (r=0.75, P=0.009).

CONCLUSIONS:

Aerobic exercise decreases TG in overweight and obese adults. However, a need exists for additional randomized controlled trials in various overweight and/or obese populations above and beyond those included in our analysis.

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Acknowledgements

We thank William Haskell, PhD, Stanford University, for reviewing our reference list and providing suggestions for the coding of studies. This study was supported by a grant from the National Institutes of Health-National Heart, Lung and Blood Institute, Award #R01-HL069802 (GA Kelley, Principal Investigator).

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Authors and Affiliations

  1. Department of Community Medicine, School of Medicine, West Virginia University, Morgantown, West Virginia, USA

    G A Kelley & K S Kelley

  2. Department of Biostatistics and Data Management, Colorado Prevention Center, Denver, CO, USA

    Z Vu Tran

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Correspondence to G A Kelley.

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Kelley, G., Kelley, K. & Vu Tran, Z. Aerobic exercise, lipids and lipoproteins in overweight and obese adults: a meta-analysis of randomized controlled trials. Int J Obes 29, 881–893 (2005). https://doi.org/10.1038/sj.ijo.0802959

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