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Titolo:
The test-retest 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: 3-4, volume: 85, anno: 2001,
pagine: 333 - 338
SICI:
1439-6319(200108)85:3-4<333:TTROGE>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
OXYGEN-UPTAKE KINETICS; SINUSOIDAL WORK LOAD; VO2 KINETICS; STATISTICAL-METHODS; DYNAMICS; CONSUMPTION; VARIABILITY; PREDICTION; RESPONSES; SPORTS;
Keywords:
pseudo random binary sequence; oxygen uptake; carbon dioxide output kinetics; test-retest 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 test-retest reliability of gas exchange kinetics in humans using a pseudo random binary sequence exercise test", EUR J A PHY, 85(3-4), 2001, pp. 333-338

Abstract

The purpose of this study was to compare the test-retest reliability of oxygen. uptake ((V) over dot O-2) 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 two-way ANOVA with repeated measures didnot reveal significant differences between test 1 and test 2 for either (V) over dot O-2 kinetics or (V) over dot CO2 kinetics. Static gain of (V) over dot O-2 for test 1 19.11 (SD 0.59) ml.min(-1).W-1] and test 2 [9.23 (SD 0.64) ml.min(-1).W-1] 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 O-2 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 O-2 kinetics in test 2. It is possible that the increased variability of (V) over dot CO2 kinetics compared to (V)over dot O-2 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 O-2 kinetics compared with (V) over dot CO2 kinetics suggests that the PRBS test Of (V) over dot O-2 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