Factors associated with the selection of the freely chosen cadence in non-cyclists |
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Authors: | Anthony G Whitty Aron J Murphy Aaron J Coutts and Mark L Watsford |
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Institution: | (1) University of Technology Sydney, Sydney, Australia |
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Abstract: | The purpose of this study was to examine both the freely chosen cadence (FCC) and the physical variables associated with cadence
selection in non-cyclists. Eighteen participants pedalled at 40, 50, and 60% of their maximal power output (determined by
a maximal oxygen uptake test, W
max), whilst cadence (50, 65, 80, 95, 110 rpm, and FCC) was manipulated. Gross efficiency, was used to analyse the most economical
cadence whilst central and peripheral ratings of perceived exertion (RPE) were used to measure the most comfortable cadence
and the cadence whereby muscle strain was minimised. Peak (T
peak), mean crank torque (T
mean) and the crank torque profile were analysed at 150 and 200 W at cadences of 50, 65, 80, 95, and 110 rpm in order to determine
the mechanical load. FCC was found to be approximately 80 rpm at all workloads and was significantly higher than the most
economical cadence (50 rpm). At 60% W
max, RPE peripheral was minimised at 80 rpm which coincided with the FCC. Both T
peak and T
mean decreased as cadence increased and, conversely, increased as power output increased. An analysis of the crank torque profile
showed that the crank angle at both the top (DPtop) and the bottom (DPbot) dead point of the crank cycle at 80 rpm occurred later in the cycling revolution when compared to 50 rpm. The findings suggested
that the FCC in non-cyclists was more closely related to variables that minimise muscle strain and mechanical load than those
associated with minimising metabolic economy. |
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Keywords: | Muscle strain Pedalling force Relative intensity |
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