Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5871919 | Clinical Nutrition | 2012 | 12 Pages |
SummaryObjectiveGiven that previous studies have reached conflicting conclusions regarding the effects of diet (D), aerobic exercise (E) or both (DE) on blood lipid and lipoprotein concentrations in adults, the meta-analytic approach was used to address this issue.Data sourcesNine electronic databases, cross-referencing, and expert review.Study selectionRandomized controlled trials â¥4 weeks that included a D, E, DE and control (C) group in adults â¥18 years of age and in which data for one or more of the following were available: total cholesterol (TC), high-density lipoprotein cholesterol (HDL-C), low-density lipoprotein cholesterol (LDL-C), triglycerides (TG).Data extractionDual data extraction by the first two authors.Statistical analysisRandom-effects models as well as mixed-effects models for between-group differences.ResultsSeven-hundred and eighty-eight men and women from 6 studies were included. Non-overlapping 95% confidence intervals were observed for D and DE with respect to lowering TC, LDL-C and TG while reductions in E were limited to TG. No significant changes in HDL-C were observed. When compared to E, reductions in TC and LDL-C were greater for D and DE (p < 0.05 for all).ConclusionsDiet, especially DE, are superior to E for improving selected lipids and lipoproteins in adults.