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Int J Sports Med 1982; 03(1): 13-17
DOI: 10.1055/s-2008-1026054
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© Georg Thieme Verlag Stuttgart · New York

Effects of Training with Eccentric Muscle Contractions on Exercise Performance, Energy Expenditure, and Body Temperature*

H. G. Knuttgen, E. R. Nadel**, K. B. Pandolf***, J. F. Patton
  • US Army Research Institute of Environmental Medicine, Natick, USA; John B. Pierce Foundation Laboratory, New Haven, USA; Sargent College of Allied Health Professions Boston University, Boston, USA
* The views, opinions, and/or findings contained in this report are those of the author(s) and should not be construed as an official Department of the Army position, policy, or decision, unless so designated by other official documentation. Human subjects participated in these studies after giving their free and informed voluntary consent. Investigators adhered to Army Regulation 70-25 and USAMRDC Regulation 70-25 on Use of Volunteers in Research.** Permanent address for H.G. Knuttgen: Sargent College of Allied Health Professions, Boston University, Boston, MA, 02215, USA.*** Permanent address for E.R. Nadel: John B. Pierce Foundation Laboratories, New Haven, CT, 06519, USA.
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Publication Date:
14 March 2008 (online)

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Abstract

To study the effects of exercise training with eccentric muscle contractions on body temperatures, energy cost, and performance capacity, six human subjects were tested before and after a 5-week training program of eccentric exercise. Exercise was performed as leg cycling on a motor-driven ergometer at power levels ranging 252-316 W. Training consisted of three sessions/week for 1 h/session. As a result of the training, V̇O2, fH. and mean skin temperature were lowered for each subject at the same absolute exercise intensities. Ability to continue exercise as indicated by endurance time improved with training. Before training, four subjects terminated exercise after 30 min because of localized leg exhaustion and one subject could not continue longer than 45 min. After training, all six subjects completed 45 min of the exercise test without difficulty. Esophageal and muscle temperatures evidenced no changes as a result of training. It was concluded that the inability of subjects to perform eccentric exercise in the untrained state was not related to muscle temperature.

Key words

muscle - exercise training - eccentric contraction - energy metabolism - body temperature