Int J Sports Med 2002; 23(2): 120-124
DOI: 10.1055/s-2002-20131
Training and Testing
© Georg Thieme Verlag Stuttgart · New York

Spontaneously Chosen Crank Rate Variations in Submaximal Arm Exercise with Inexperienced Subjects. Effects on Cardiorespiratory and Efficiency Parameters

G.  Marais1 , L.  Dupont2 , M.  Maillet2 , T.  Weissland2 , J.  Vanvelcenaher2 , P.  Pelayo1
  • 1 Laboratoire d’Etudes de la Motricité Humaine, Faculté des Sciences du Sport et de l’Education Physique, Université de Lille 2, France.
  • 2 Centre de Rééducation et de Réadaptations Fonctionnelles et Spécialisées - l’Espoir, Lille Hellemmes, France
Further Information

Publication History

May 31, 2001

Publication Date:
13 February 2002 (online)

Abstract

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.

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G. Marais

Faculté des Sciences du Sport et de l’EP · Université de Lille 2

9 rue de l’université · 59790 Ronchin · France ·

Phone: +33 (0320) 887379

Fax: +33 (0320) 887377

Email: gmarais@hp-sc.univ-lille2.fr

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