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Open Access Research

The effects of a formal exercise training programme on salivary hormone concentrations and body composition in previously sedentary aging men

Lawrence D Hayes12*, Fergal M Grace1, Nick Sculthorpe13, Peter Herbert4, John WT Ratcliffe1, Liam P Kilduff5 and Julien S Baker1

Author Affiliations

1 Institute of Clinical Exercise and Health Science, University of the West of Scotland, Hamilton, Scotland

2 School of Human Sciences, London Metropolitan University, 166-220 Holloway Road, London, N7 8DB, UK

3 Department of Sport and Exercise Sciences, University of Bedfordshire, Bedfordshire, UK

4 School of Sport, Health and Outdoor Education, Trinity Saint David, University of Wales, Wales, UK

5 Department of Sports Science, Swansea University, Swansea, UK

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SpringerPlus 2013, 2:18  doi:10.1186/2193-1801-2-18

Published: 22 January 2013

Abstract

Alteration in body composition, physical function, and substrate metabolism occur with advancing age. These changes may be attenuated by exercise. This study examined whether twenty eight, previously sedentary males (62.5 ± 5.3 years of age; body mass of 89.7 ± 16.4 kg) adhering to the ACSM minimum guidelines for aerobic exercise for six weeks would improve exercise capabilities, body composition and salivary hormone profiles. After six weeks of adhering to the guidelines, salivary testosterone and vo2max (absolute and relative) increased (p < 0.05), whilst body fat percentage and body mass decreased (p < 0.05). Peak power output, fat free mass and cortisol values were not significantly different. Interestingly, salivary testosterone correlated inversely with body fat percentage (R2 = .285, p = 0.011). These results suggest that despite previous inactivity, older males can achieve improvements in cardiorespiratory fitness, body composition and anabolism by adhering to simple lifestyle changes.

Keywords:
Cortisol; Testosterone; Sarcopenia; Aging; Physical activity