Reliability of a high-intensity endurance cycling test
Deutscher übersetzter Titel: | Reliabilität eines hochintensiven Fahrrad-Ausdauertests |
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Autor: | O'Hara, John Paul; Thomas, A.; Seims, A.; Cooke, C.B.; King, R.F.G.J. |
Erschienen in: | International journal of sports medicine |
Veröffentlicht: | 33 (2012), 1, S. 18-25, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Gedruckte Ressource Elektronische Ressource (online) |
Sprache: | Englisch |
ISSN: | 0172-4622, 1439-3964 |
DOI: | 10.1055/s-0031-1284340 |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU201202000804 |
Quelle: | BISp |
Abstract
This study assessed the reproducibility of performance and selected metabolic variables during a variable high-intensity endurance cycling test. 8 trained male cyclists (age: 35.9±7.7 years, maximal oxygen uptake: 54.3±3.9 mL·kg − 1·min − 1) completed 4 high-intensity cycling tests, performed in consecutive weeks. The protocol comprised: 20 min of progressive incremental exercise, where the power output was increased by 5% maximal workload (Wmax) every 5 min from 70% Wmax to 85% Wmax; ten 90 s bouts at 90% Wmax, separated by 180 s at 55% Wmax; 90% Wmax until volitional exhaustion. Blood samples were drawn and heart rate was monitored throughout the protocol. There was no significant order effect between trials for time to exhaustion (mean: 4 113.0±60.8 s) or total distance covered (mean: 4 6126.2±1 968.7 m). Total time to exhaustion and total distance covered showed very high reliability with a mean coefficient of variation (CV) of 1.6% (95% Confidence Intervals (CI) 0.0±124.3 s) and CV of 2.2% (95% CI 0.0 ±1904.9 m), respectively. Variability in plasma glucose concentrations across the time points was very small (CV 0.46-4.3%, mean 95% CI 0.0±0.33 to 0.0±0.94 mmol·L − 1). Plasma lactate concentrations showed no test order effect. The reliability of performance and metabolic variables makes this protocol a valid test to evaluate nutritional interventions in endurance cycling. Verf.-Referat