Physiological Effects of Variations in Spontaneously Chosen Crank Rate During Sub-Maximal and Supra-Maximal Upper Body Exercises

• Published in: International journal of sports medicine 1999-05, Vol.20 (4), p.239-245
• Main Authors: Marais, G., Weissland, T., Robin, H., Vanvelcenaher, J. M., Lavoie, J. M., Pelayo, P.
• Format: Article
• Language: English
• Subjects: Adult; Arm; Biological and medical sciences; Biomechanical Phenomena; Exercise - physiology; Exercise Test; Fundamental and applied biological sciences. Psychology; Humans; Male; Physical Endurance - physiology; Ships; Training and Testing; Vertebrates: body movement. Posture. Locomotion. Flight. Swimming. Physical exercise. Rest. Sports; Weight-Bearing
• ISSN: 0172-4622; 1439-3964
• DOI: 10.1055/s-2007-971124

The aim of the present study was to compare the physiological responses when the crank rate was chosen spontaneously (Ts) or set at +/- 10% (T-10%, T+10%) of the freely chosen rate, during two upper body exercises: i) a sub-maximal test (T(SUB)) in which intensities ranged from 50 to 80% (118.4 +/- 10.2 to 189.5 +/- 16.3 watts) of maximal power (MP) and ii) a supramaximal test (T(SUPRA)) in which power output was set at 110 and 120% (260.5 +/- 22.4 and 284.2 +/- 24.4 watts) of MP. Eight nationally and internationally ranked kayakers, aged 20 +/- 2 years, performed these tests in which power outputs were normalised in relation to the maximal power output determined during T(MP). In T(SUB+10%), oxygen uptake and ventilation were significantly (P< 0.05) higher than during T(SUBxS). In T(SUB+10%) and T(SUB-10%), energy expenditure was significantly (P