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Relationships between components of physical activity, cardiorespiratory fitness, cardiac autonomic health, and brain-derived neurotrophic factor

Ramsbottom, R., Currie, J. and Gilder, M. (2010) Relationships between components of physical activity, cardiorespiratory fitness, cardiac autonomic health, and brain-derived neurotrophic factor Journal of Sports Sciences, 28, (8), pp. 843-849. (PMID:20480426).

Record type: Article

Abstract

The aim of this study was to examine the relationships between physical activity, cardiorespiratory fitness, cardiac autonomic health, and brain-derived neurotrophic factor concentrations in healthy men (n = 28) and women (n = 16). Cardiorespiratory fitness ([Vdot]O2max, litres · min-1) was estimated from heart rate and work rate using a 6-min cycle ergometer test, cardiac autonomic health was assessed from supine measures of heart rate variability using standard telemetry techniques, physical activity was assessed by questionnaire, and brain-derived neurotrophic factor by enzyme-linked immunosorbant assay (ELISA). There was no significant difference in cardiorespiratory fitness between men (3.75 ± 0.84 litres · min-1) and women (3.43 ± 0.72 litres · min-1) (P = 0.206). Similarly, there was no significant difference in Baecke scores (work, sport, and leisure) between men and women. Cardiorespiratory fitness was significantly correlated with seated heart rate (r = -0.445, P = 0.002, n = 44), the heart rate variability measure SD12 (index of cardiac autonomic health) (r = 0.462, P = 0.035, n = 21), and Baecke sport score (r = 0.536, P = 0.000, n = 43). Cardio autonomic health (SD12) was negatively associated with brain-derived neurotrophic factor concentration although this correlation did not attain statistical significance (r = -0.324, P = 0.152, n = 21). The results show that cardiorespiratory fitness was significantly correlated with the Baecke sport (rather than work or leisure) score and cardiac autonomic function (SD12). However, SD12 was not significantly associated with resting concentrations of serum brain-derived neurotrophic factor, a key regulator of energy metabolism and neural plasticity.

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More information

Published date: June 2010
Keywords: relationships between components of physical activity, cardiorespiratory fitness, cardiac autonomic health, and brain-derived neurotrophic factor

Identifiers

Local EPrints ID: 165933
URI: http://eprints.soton.ac.uk/id/eprint/165933
ISSN: 0264-0414
PURE UUID: 2a814514-c528-4cff-a323-06bf135496fd

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Date deposited: 20 Oct 2010 10:53
Last modified: 18 Jul 2017 12:26

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Contributors

Author: R. Ramsbottom
Author: J. Currie
Author: M. Gilder

University divisions

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