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Related Experiment Videos

Aging, resistance training, and motor unit discharge behavior.

Gary Kamen1

  • 1Dept. of Exercise Science, University of Massachusetts, Amherst, MA 01003, USA.

Canadian Journal of Applied Physiology = Revue Canadienne De Physiologie Appliquee
|September 1, 2005
PubMed
Summary

Neural factors like motor unit recruitment influence muscular strength. Changes in motor unit discharge rates correlate with strength gains, especially during early resistance training in both young and older adults.

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Area of Science:

  • Neuroscience
  • Exercise Physiology
  • Human Movement Science

Background:

  • Neural factors are implicated in muscular strength expression and development.
  • Aging is associated with reduced motor unit discharge rates.

Purpose of the Study:

  • To review candidate neural factors contributing to muscular strength.
  • To explore the role of neural factors in strength changes during resistance training.

Main Methods:

  • Review of existing literature on neural factors and muscular strength.
  • Analysis of motor unit recruitment, rate coding, double firing, and synchronization.

Main Results:

  • Young and older adults show rapid strength increases with repeated testing.

Related Experiment Videos

  • These strength gains are linked to transient increases in motor unit discharge rate.
  • Neural factors may drive initial strength adaptations in resistance training.

    • Conclusions:

    • Neural factors are crucial for the initial adaptations in muscular strength.
    • Motor unit discharge rate changes are key indicators of strength development.