Picture of two heads

Open Access research that challenges the mind...

The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs. Strathprints provides access to thousands of Open Access research papers by University of Strathclyde researchers, including those from the School of Psychological Sciences & Health - but also papers by researchers based within the Faculties of Science, Engineering, Humanities & Social Sciences, and from the Strathclyde Business School.

Discover more...

Comparison of power and EMG during a 6-s all-out cycling between young and older women

Duffy, Charles and Stewart, D and Pecoraro, Fabrizio and Riches, Philip and Farina, Dario and Macaluso, Andrea (2012) Comparison of power and EMG during a 6-s all-out cycling between young and older women. Journal of Sport Sciences, 30. pp. 1311-1321. ISSN 0264-0414

[img] PDF (Published version)
2012_Duffy.pdf - Final Published Version
Restricted to Registered users only
License: Unspecified

Download (507kB) | Request a copy from the Strathclyde author


To investigate the effects of ageing on the neural control strategies governing sprint cycling on a friction-loaded cycleergometer, 10 older (aged 70–83yr) and 8 young (aged 19–35yr) healthy women completed seven 6-s all-out cycling trials against varying loads. Root mean square (RMS), median frequency and muscle fibre conduction velocity were determined from the vastus lateralis of the dominant limb during each pedal stroke. Peak power was 43% lower in the older group compared to the younger (p 5 0.001) and was accompanied by a significantly lower RMS (p 5 0.05). No differences were observed in the other electromyography (EMG) parameters between the groups (p 4 0.05). DRMS from the first to the sixth second during each trial was found to increase significantly with the development of power output in both groups (p 5 0.05). For the first time during an all-out 6-s cycle trial, it has been demonstrated that older women’s lower mechanical power output was accompanied by a significantly lower RMS, which indicates a decline in either the number of active of motor units or a reduced discharge rate. Hence, changes in motor units can be regarded as a contributory factor to the decline of muscle power with advancing age. Overall, though, similar neural strategies are adopted in both younger and older populations.