The reliability of a 30-minute performance test on a Lode cycle ergometer

Matthew William Driller

Abstract


High retest reliability is desirable in tests used to monitor athletic performance. The purpose of the present study was to determine the reliability of a 30-minute cycle test on a cycle ergometer (Lode, Groningen, Netherlands). Following an incremental VO2max test, 10 highly-trained cyclists (mean ± SD; age = 30 ± 6 years; VO2max = 67.7 ± 2.5 mL.kg-1.min-1) completed three 30-minute cycling tests on a Lode cycle ergometer each separated by more than 48 hours. The cycle test implemented a fixed workload for 15-minutes (set at 70% VO2max power output), followed by a 15-minute time-trial. Variables determined during the test were mean power (Wmean), blood lactate concentration at 15-minutes (BL15), peak blood lactate concentration (BLpeak) and mean heart rate (HRmean). Wmean in trial 1 (312 ± 23 W) increased by 0.8% (95% confidence interval: -0.7 to 2.3%) in trial 2 and by a further 0.4% (-0.3 to 1.1%) in trial 3. The typical error of measurement expressed as a coefficient of variation (CV%) for Wmean was 1.3% (1.0 to 1.8%). The CV for BL15 was 10.9% (8.3 to 15.9%), BLpeak; 8.4% (6.5 to 13.0%) and HRmean; 2.4% (1.8 to 3.4%). The average intraclass correlations between trials were Wmean: 0.98 (0.96 to 1.00), BL15: 0.94 (0.85 to 0.98), BLpeak: 0.88 (0.71- 0.97) and HRmean: 0.88 (0.71 to 0.97). A strong correlation existed between VO2max and PPO in the incremental test and Wmean in the 30-minute TT (r = 0.86, 0.93, respectively). The testing protocol performed on a Lode cycle ergometer in the current study is reproducible in highly-trained cyclists, making it a reliable method for monitoring cycling performance.

Keywords


reliability, cycling, reproducibility, performance test

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DOI: https://doi.org/10.28985/jsc.v1i2.18

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Journal of Science and Cycling (JSC). eISSN: 2254-7053. Cycling Research Center, Inc. All Rights Reserved. Carretera Jaén s/n Km. 426.5. Pulianas-Granada CP 18197 (Pol. ASORIA).

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