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Titolo: The testretest reliability of gas exchange kinetics in humans using a pseudo random binary sequence exercise test
Autore: Edwards, AM; Challis, NV; Chapman, JH; Claxton, DB; Fysh, ML;
 Indirizzi:
 Univ Reading, Sch Educ, Reading RG6 1HY, Berks, England Univ Reading Reading Berks England RG6 1HY eading RG6 1HY, Berks, England Sheffield Hallam Univ, Sch Sci & Math, Sheffield, S Yorkshire, England Sheffield Hallam Univ Sheffield S Yorkshire England S Yorkshire, England Sheffield Hallam Univ, Ctr Sport & Exercise Sci, Sch Sport & Leisure Management, Sheffield, S Yorkshire, England Sheffield Hallam Univ Sheffield S Yorkshire England S Yorkshire, England
 Titolo Testata:
 EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY
fascicolo: 34,
volume: 85,
anno: 2001,
pagine: 333  338
 SICI:
 14396319(200108)85:34<333:TTROGE>2.0.ZU;29
 Fonte:
 ISI
 Lingua:
 ENG
 Soggetto:
 OXYGENUPTAKE KINETICS; SINUSOIDAL WORK LOAD; VO2 KINETICS; STATISTICALMETHODS; DYNAMICS; CONSUMPTION; VARIABILITY; PREDICTION; RESPONSES; SPORTS;
 Keywords:
 pseudo random binary sequence; oxygen uptake; carbon dioxide output kinetics; testretest reliability;
 Tipo documento:
 Article
 Natura:
 Periodico
 Settore Disciplinare:
 Life Sciences
 Citazioni:
 38
 Recensione:
 Indirizzi per estratti:
 Indirizzo: Edwards, AM Univ Reading, Sch Educ, Bulmershe Court, Reading RG6 1HY, Berks, England Univ Reading Bulmershe Court Reading Berks England RG6 1HY and



 Citazione:
 A.M. Edwards et al., "The testretest reliability of gas exchange kinetics in humans using a pseudo random binary sequence exercise test", EUR J A PHY, 85(34), 2001, pp. 333338
Abstract
The purpose of this study was to compare the testretest reliability of oxygen. uptake ((V) over dot O2) kinetics with carbon dioxide output ((V) over dot CO2) kinetics using a pseudo random binary sequence (PRBS) exercise test. A reliable test of gas exchange kinetics would have the potential of being applied as a sports fitness test. Ten healthy male subjects agreed toparticipate in the study and all subjects completed two identical PRBS exercise tests (test 1 and test 2), separated by a 30 min period of inactivity. Three consecutive 300 s PRBS cycles were completed in each test with 20 sexercise intensity changes between 25 and 85 W using an electrically braked cycle ergometer. Fourier analysis was computed for frequencies 3.3, 6.7 and 10 mHz. Statistical analysis by twoway ANOVA with repeated measures didnot reveal significant differences between test 1 and test 2 for either (V) over dot O2 kinetics or (V) over dot CO2 kinetics. Static gain of (V) over dot O2 for test 1 19.11 (SD 0.59) ml.min(1).W1] and test 2 [9.23 (SD 0.64) ml.min(1).W1] did not differ significantly between tests. The 95% limits of agreement for (V) over dot CO2 kinetics displayed increased variability in comparison to (V) over dot O2 kinetics at each frequency of amplitude ratio and phase shift. Systematic bias ranged between 0% and 4%, except at frequency 10 mHz of (V) over dot CO2 kinetics phase shift which showeda 10% bias for slower (V) over dot O2 kinetics in test 2. It is possible that the increased variability of (V) over dot CO2 kinetics compared to (V)over dot O2 kinetics might be attributable to a lower signal to noise ratio in (V) over dot CO2 kinetics, variations in ventilation or the storage mechanisms Of CO2. The lower variability of (V) over dot O2 kinetics compared with (V) over dot CO2 kinetics suggests that the PRBS test Of (V) over dot O2 kinetics has the greater potential for further development as an indicator of aerobic fitness.
ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 31/03/20 alle ore 10:07:26