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Sports Med. 2015 Feb;45(2):279-96. doi: 10.1007/s40279-014-0272-9.

Exercise modalities and endothelial function: a systematic review and dose-response meta-analysis of randomized controlled trials.

Author information

1
Human Nutrition Research Centre, Institute of Cellular Medicine, Newcastle University, Campus for Ageing and Vitality, Newcastle on Tyne, NE4 5PL, UK, a.w.ashor@newcastle.ac.uk.

Abstract

BACKGROUND:

Regular exercise is associated with enhanced nitric oxide (NO) bioavailability. Flow-mediated dilation (FMD) is used widely to assess endothelial function (EF) and NO release.

OBJECTIVES:

The aims of this systematic review and meta-analysis were to (i) investigate the effect of exercise modalities (aerobic, resistance or combined) on FMD; and (ii) determine which exercise and participant characteristics are most effective in improving FMD.

METHODS:

We searched the MEDLINE, Embase, Cochrane Library, and Scopus databases for studies that met the following criteria: (i) randomized controlled trials of exercise with comparative non-exercise, usual care or sedentary groups; (ii) duration of exercise intervention ≥4 weeks; (iii) age ≥18 years; and (iv) EF measured by FMD before and after the intervention. Weighted mean differences (WMDs) with 95% confidence interval were entered into a random effect model to estimate the pooled effect of the exercise interventions.

RESULTS:

All exercise modalities enhanced EF significantly: aerobic (WMD 2.79, 95% CI 2.12-3.45, p = 0.0001), resistance (WMD 2.52, 95% CI 1.11-3.93, p = 0.0001) and combined (WMD 2.07, 95% CI 0.70-3.44, p = 0.003). A dose-response relationship was observed between aerobic exercise intensity and improvement in EF. A 2 metabolic equivalents (MET) increase in absolute exercise intensity or a 10% increase in relative exercise intensity resulted in a 1% unit improvement in FMD. There was a positive relationship between frequency of resistance exercise sessions and improvement in EF (β 1.14, CI 0.16-2.12, p = 0.027).

CONCLUSIONS:

All exercise modalities improve EF significantly and there was a significant, positive relationship between aerobic exercise intensity and EF. Greater frequency, rather than intensity, of resistance exercise training enhanced EF.

PMID:
25281334
DOI:
10.1007/s40279-014-0272-9
[Indexed for MEDLINE]

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