Muscle damage induced by electrical stimulation


Electrical stimulation (ES) induces muscle damage that is characterised by histological alterations of muscle fibres and connective tissue, increases in circulating creatine kinase (CK) activity, decreases in muscle strength and development of delayed onset muscle soreness (DOMS). Muscle damage is induced not only by eccentric contractions with ES but also by isometric contractions evoked by ES. Muscle damage profile following 40 isometric contractions of the knee extensors is similar between pulsed current (75 Hz, 400 μs) and alternating current (2.5 kHz delivered at 75 Hz, 400 μs) ES for similar force output. When comparing maximal voluntary and ES-evoked (75 Hz, 200 μs) 50 isometric contractions of the elbow flexors, ES results in greater decreases in maximal voluntary contraction strength, increases in plasma CK activity and DOMS. It appears that the magnitude of muscle damage induced by ES-evoked isometric contractions is comparable to that induced by maximal voluntary eccentric contractions, although the volume of affected muscles in ES is not as large as that of eccentric exercise-induced muscle damage. It seems likely that the muscle damage in ES is associated with high mechanical stress on the activated muscle fibres due to the specificity of motor unit recruitment (i.e., non-selective, synchronous and spatially fixed manner). The magnitude of muscle damage induced by ES is significantly reduced when the second ES bout is performed 2–4 weeks later. It is possible to attenuate the magnitude of muscle damage by “pre-conditioning” muscles, so that muscle damage should not limit the use of ES in training and rehabilitation.

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Correspondence to Kazunori Nosaka.

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This article is published as part of the Special Issue Cluster on the XVIII Congress of the International Society of Electrophysiology and Kinesiology (ISEK 2010) that took place in Aalborg, Denmark on 16–19 June 2010.

Communicated by Roberto Bottinelli.

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Nosaka, K., Aldayel, A., Jubeau, M. et al. Muscle damage induced by electrical stimulation. Eur J Appl Physiol 111, 2427 (2011).

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  • Electrostimulation
  • Muscle strength
  • Delayed onset muscle soreness
  • Creatine kinase
  • Repeated bout effect
  • Isometric
  • Eccentric
  • Elbow flexors
  • Knee extensors