caa a22 4500 467942013 CHVBK 20180406153015.0 cr unu---uuuuu 170328e20060701xx s 000 0 eng 10.1007/s00421-006-0189-6 doi (NATIONALLICENCE)springer-10.1007/s00421-006-0189-6 Optimal power-to-mass ratios when predicting flat and hill-climbing time-trial cycling [Elektronische Daten] [A. Nevill, S. Jobson, R. Davison, A. Jeukendrup] The purpose of this article was to establish whether previously reported oxygen-to-mass ratios, used to predict flat and hill-climbing cycling performance, extend to similar power-to-mass ratios incorporating other, often quick and convenient measures of power output recorded in the laboratory [maximum aerobic power (W MAP), power output at ventilatory threshold (W VT) and average power output (W AVG) maintained during a 1h performance test]. A proportional allometric model was used to predict the optimal power-to-mass ratios associated with cycling speeds during flat and hill-climbing cycling. The optimal models predicting flat time-trial cycling speeds were found to be (W MAP m −0.48)0.54, (W VT m −0.48)0.46 and (W AVG m −0.34)0.58 that explained 69.3, 59.1 and 96.3% of the variance in cycling speeds, respectively. Cross-validation results suggest that, in conjunction with body mass, W MAP can provide an accurate and independent prediction of time-trial cycling, explaining 94.6% of the variance in cycling speeds with the standard deviation about the regression line, s=0.686kmh−1. Based on these models, there is evidence to support that previously reported $$\dot{V}\hbox{O}_{2}$$ -to-mass ratios associated with flat cycling speed extend to other laboratory-recorded measures of power output (i.e. Wm −0.32). However, the power-function exponents (0.54, 0.46 and 0.58) would appear to conflict with the assumption that the cyclists' speeds should be proportional to the cube root (0.33) of power demand/expended, a finding that could be explained by other confounding variables such as bicycle geometry, tractional resistance and/or the presence of a tailwind. The models predicting 6 and 12% hill-climbing cycling speeds were found to be proportional to (W MAP m −0.91)0.66, revealing a mass exponent, 0.91, that also supports previous research. Springer-Verlag, 2006 Power supply and demand nationallicence Cycling speed nationallicence Maximal aerobic power ( W MAP) nationallicence Power at ventilatory threshold ( W VT) nationallicence Average power output ( W AVG) nationallicence Nevill A. Research Institute of Healthcare Sciences, Simon Jobson, School of Sport, Performing Arts and Leisure, University of Wolverhampton, Gorway Road, WS1 3BD, Walsall, West Midlands, England aut Jobson S. Research Institute of Healthcare Sciences, Simon Jobson, School of Sport, Performing Arts and Leisure, University of Wolverhampton, Gorway Road, WS1 3BD, Walsall, West Midlands, England aut Davison R. Department of Sport and Exercise Science, University of Portsmouth, Portsmouth, Hampshire, England aut Jeukendrup A. School of Sport and Exercise Sciences, The University of Birmingham, Edgbaston, Birmingham, West Midlands, England aut European Journal of Applied Physiology Springer-Verlag 97/4(2006-07-01), 424-431 1439-6319 97:4<424 2006 97 421 https://doi.org/10.1007/s00421-006-0189-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00421-006-0189-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Nevill A. Research Institute of Healthcare Sciences, Simon Jobson, School of Sport, Performing Arts and Leisure, University of Wolverhampton, Gorway Road, WS1 3BD, Walsall, West Midlands, England aut NATIONALLICENCE 700 1- Jobson S. Research Institute of Healthcare Sciences, Simon Jobson, School of Sport, Performing Arts and Leisure, University of Wolverhampton, Gorway Road, WS1 3BD, Walsall, West Midlands, England aut NATIONALLICENCE 700 1- Davison R. Department of Sport and Exercise Science, University of Portsmouth, Portsmouth, Hampshire, England aut NATIONALLICENCE 700 1- Jeukendrup A. School of Sport and Exercise Sciences, The University of Birmingham, Edgbaston, Birmingham, West Midlands, England aut NATIONALLICENCE 773 0- European Journal of Applied Physiology Springer-Verlag 97/4(2006-07-01), 424-431 1439-6319 97:4<424 2006 97 421 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer