caa a22 4500 467940045 CHVBK 20180406153009.0 cr unu---uuuuu 170328e20061201xx s 000 0 eng 10.1007/s00421-006-0305-7 doi (NATIONALLICENCE)springer-10.1007/s00421-006-0305-7 Reliability of a cycling time trial in a glycogen-depleted state [Elektronische Daten] [Kevin Currell, Roy Jentjens, Asker Jeukendrup] The aim of this study was to investigate the reliability of a protocol designed to simulate endurance performance in events of long duration (∼5h) where endogenous carbohydrate stores are low. Seven male subjects were recruited (age 27±7years, VO2max 66±5ml/kg/min, W max 367±42W). The subjects underwent three trials to determine the reliability of the protocol. For each trial subjects entered the laboratory in the evening to undergo a glycogen-depleting exercise trial lasting approximately 2.5h. The subjects returned the following morning in a fasted state to undertake a 1-h steady-state ride at 50% W max followed by a time trial of approximately 40-min duration. Each trial was separated by 7-14days. The trials were analysed for reliability of time to completion of the time trial using a coefficient of variation (CV), with 95% confidence intervals (data are mean±SD). The times to complete the three trials were 2,546±529, 2,585±490 and 2,568±555s for trials 1, 2 and 3, respectively. The CV between trials 1 and 2 was 4.5% (95% CI 2.9-10.4%) and between trials 2 and 3, 3.8% (95% CI 2.4-9.9%). There was no difference in oxygen uptake, respiratory exchange ratio, carbohydrate oxidation, fat oxidation, plasma glucose concentration and plasma lactate concentration between the three trials. Therefore we can conclude that prior glycogen depletion does produce a reliable measure of performance with metabolic characteristics similar to ultraendurance exercise. Springer-Verlag, 2006 Cycling nationallicence Ultraendurance nationallicence Reliability nationallicence Performance nationallicence Currell Kevin School of Sport and Exercise Sciences, University of Birmingham, Edgbaston, B15 2TT, Birmingham, UK aut Jentjens Roy School of Sport and Exercise Sciences, University of Birmingham, Edgbaston, B15 2TT, Birmingham, UK aut Jeukendrup Asker School of Sport and Exercise Sciences, University of Birmingham, Edgbaston, B15 2TT, Birmingham, UK aut European Journal of Applied Physiology Springer-Verlag 98/6(2006-12-01), 583-589 1439-6319 98:6<583 2006 98 421 https://doi.org/10.1007/s00421-006-0305-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00421-006-0305-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Currell Kevin School of Sport and Exercise Sciences, University of Birmingham, Edgbaston, B15 2TT, Birmingham, UK aut NATIONALLICENCE 700 1- Jentjens Roy School of Sport and Exercise Sciences, University of Birmingham, Edgbaston, B15 2TT, Birmingham, UK aut NATIONALLICENCE 700 1- Jeukendrup Asker School of Sport and Exercise Sciences, University of Birmingham, Edgbaston, B15 2TT, Birmingham, UK aut NATIONALLICENCE 773 0- European Journal of Applied Physiology Springer-Verlag 98/6(2006-12-01), 583-589 1439-6319 98:6<583 2006 98 421 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer