Spontaneously chosen crank rate variations in submaximal arm exercise with inexperienced subjects : effects on cardiorespiratory and efficiency parameters
Deutscher übersetzter Titel: | Variationen der spontan gewählten Kurbelfrequenz bei submaximaler Armergometerbelastung mit unerfahrenen Personen : Auswirkungen auf die kardiorespiratorischen und leistungsbezogenen Parameter |
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Autor: | Marais, G.; Dupont, L.; Maillet, M.; Weissland, T.; Vanvelcenaher, J.; Pelayo, P. |
Erschienen in: | International journal of sports medicine |
Veröffentlicht: | 23 (2002), 2, S. 120-124, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Gedruckte Ressource Elektronische Ressource (online) |
Sprache: | Englisch |
ISSN: | 0172-4622, 1439-3964 |
DOI: | 10.1055/s-2002-20131 |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU200404001038 |
Quelle: | BISp |
Abstract des Autors
The aim of the present study was to compare the physiological responses during arm exercises when the crank rate was chosen spontaneously (TS) or set at ± 20 % (T-20, T+20) of the spontaneously chosen crank rate (SCCR). Eight physical education male students, aged 22 ± 3.2 years, performed an upper body exercise in which intensities ranged from unload to 80 % of maximal power. No significant difference was observed in oxygen uptake, ventilation, gross and net efficiency values between TS and T+ 20 or T-20. Nevertheless, oxygen uptake and ventilation were significantly (p<0.05) lower and gross and net efficiencies higher (p<0.05) during T-20 than T+20. No significant difference was noticed for heart rate, delta and work efficiency between TS, T-20 and T+20. The hypothesis that SCCR is the most economical one according to the efficiency parameters was not quite verified. However, crank rates lower than SCCR could be interesting because they increase gross efficiency compared to higher crank rates. Moreover, the selection of crank rates depends on power output. Indeed, SCCR increased significantly (p<0.05) with power output. In the physical reconditioning of injured or handicapped subjects, the latter are very sensitive to the power output, and the crank rate could be another constraint. Verf.-Referat