g Biomedical Open Access Journal For Medical and Clinical Research | Biomedres.us
  info@biomedres.us   +1 (720) 414-3554   600 Third Avenue, 2nd floor, New York - 10016, USA
ISSN: 2574 -1241
Impact Factor 0.548

Review ArticleOpen Access

Motor-Unit Recruitment Plays an Important Role in Determining the Relationship Between Muscle Force and Force Variability

Volume 8 - Issue 5

Wan X Yao*, William M Land and Yufei Huang

  • Author Information Open or Close
    • Department of Kinesiology, Health, & Nutrition College of Education & Human Development, The University of Texas at San Antonio, San Antonio, USA

    *Corresponding author: Wan X Yao, Department of Kinesiology, Health, & Nutrition College of Education & Human Development, The University of Texas at San Antonio, San Antonio, USA, Tel: 210- 458-5642; Email: wanxiang.yao@utsa.edu

Received: July 23, 2018;   Published: September 10, 2018

DOI: 10.26717/BJSTR.2018.08.001722

Full Text PDF

To view the Full Article   Peer-reviewed Article PDF

Abstract

Literature shows that force variability increases when force levels increase. However, this constant increase occurs only to a certain point (e.g., at around 50% of maximum voluntary contraction (MVC) and 80% MVC). After this point, the increase of force variability either slows [1,2] or stops [3-5]. The potential underlying mechanism accounting for the changing rate of increase in force variability is discussed in this brief review. It concludes that among several factors, motor-unit recruitment appears to be the most important factor in determining the relationship between force and force variability although both motor unit discharge rate variability and synchronization have a significant impact on force variability as well.

Keywords: Motor-Unit recruitment; Discharge rate; Motor-Unit synchronization; Force variability

Abstract | Introduction | Motor-Unit Recruitment | Discharge Rate | Synchronization | Conclusion | References |