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Voluntary activation during maximal contraction with advancing age: a brief review

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Abstract

It is well established that the loss of muscle mass (i.e. sarcopenia) is the primary factor contributing to the reduction in muscle force with ageing. Based on the observation that force declines at a faster rate than muscle mass, neural alterations are also thought to contribute to muscle weakness by reducing central drive to the agonist muscles and by increasing coactivation of the antagonist muscles. Researchers have attempted to quantify the contribution of impaired voluntary drive to the decline in muscle force using superimposed electrical stimulation during maximal voluntary contractions (MVCs) and by recording surface electromyographic (EMG) activity. Although reduced voluntary activation of agonist muscles and increased coactivation of antagonist muscles during a MVC have been reported with advancing age, such changes are not supported by all studies. These discrepancies may be explained by differences in sensitivity between the methods used to assess voluntary activation, as well as differences between the characteristics of the study population, the muscle group that is tested, and the type of contraction that is performed. The objective of this review is to summarize current knowledge regarding the activation of agonist and antagonist muscles during MVC in elderly and to try to clarify the disparities in literature concerning the influence of a possible deficit in voluntary activation on the maximal force capacity of muscles in elderly adults.

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Acknowledgments

The authors are particularly grateful to Dr K. Maluf for useful comments on the paper and to A. Desseir for assistance in the preparation of the manuscript. Some experiments described in this review were performed with support from a grant of the European Community (contract QLK6-CT-2001-00323) and the Fonds National de la Recherche Scientifique of Belgium.

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  1. Laboratory of Applied Biology, Université Libre de Bruxelles, 28 avenue P. Héger, CP 168, 1000, Brussels, Belgium

    Malgorzata Klass, Stéphane Baudry & Jacques Duchateau

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  1. Malgorzata Klass
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  2. Stéphane Baudry
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Correspondence to Jacques Duchateau.

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Klass, M., Baudry, S. & Duchateau, J. Voluntary activation during maximal contraction with advancing age: a brief review. Eur J Appl Physiol 100, 543–551 (2007). https://doi.org/10.1007/s00421-006-0205-x

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