Journal of Electromyography and Kinesiology
Volume 20, Issue 4 , Pages 655-660, August 2010

Peripheral and central fatigue after muscle-damaging exercise is muscle length dependent and inversely related

  • Albertas Skurvydas

      Affiliations

    • Laboratory of Human Motorics, Department of Applied Physiology and Physiotherapy of the Lithuanian Academy of Physical Education, Kaunas, Lithuania
    • Corresponding Author InformationCorresponding author. Tel.: +370 682 14700; fax: +370 77 204515.
    • ,
  • Marius Brazaitis

      Affiliations

    • Laboratory of Human Motorics, Department of Applied Physiology and Physiotherapy of the Lithuanian Academy of Physical Education, Kaunas, Lithuania
    • ,
  • Sigitas Kamandulis

      Affiliations

    • Laboratory of Human Motorics of the Lithuanian Academy of Physical Education, Kaunas, Lithuania
    • ,
  • Saule Sipaviciene

      Affiliations

    • Laboratory of Human Motorics, Department of Applied Physiology and Physiotherapy of the Lithuanian Academy of Physical Education, Kaunas, Lithuania

Received 27 May 2009; received in revised form 19 February 2010; accepted 22 February 2010. published online 29 March 2010.

Abstract 

Healthy untrained men performed 10 series of 12 knee eccentric extension repetitions (EE) at 160°/s. The maximal voluntary isometric contraction force of the quadriceps muscle, the maximal rate of electrically induced torque development (RTD) and relaxation (RTR), isokinetic concentric torque at 30°/s, the electrostimulation-induced torque at 20 and 100Hz frequencies were established before and after EE at shorter and longer muscle lengths. Besides, voluntary activation (VA) index and central activation ratio (CAR) were tested. There was more peripheral fatigue than central after EE. We established more central fatigue as well as low frequency fatigue at a shorter muscle length compared to the longer muscle length. Relative RTD as well as relative RTR, improved after EE and did not depend on the muscle length. Finally, central fatigue is inversely significantly related with the eccentric torque reduction during eccentric exercise and with the changes in muscle torque induced by low frequency stimulation.

Keywords: Muscle length, Contraction, Central and peripheral fatigue, Damage

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PII: S1050-6411(10)00040-4

doi:10.1016/j.jelekin.2010.02.009

Journal of Electromyography and Kinesiology
Volume 20, Issue 4 , Pages 655-660, August 2010

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