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Cross-Sectional Area and Muscular Strength

A Brief Review

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Abstract

A brief review is provided on the relationship of strength to muscle crosssectional area (CSA). It is commonly believed that maximal force and CSA are strongly related. Studies examining varying levels of training status display discordant data suggesting complex relationships between training status, CSA and peak force. It has been reported that trained participants had a significantly larger force to CSA ratio (F/CSA) than untrained males and females. Therefore, it is difficult to attribute all force changes due to training to CSA changes. In general, studies of CSA and strength suggest that sex differences may exist. For example, recreationally trained female weightlifters produced higher F/CSA than males at lower velocities of contraction. Definitive conclusions regarding sex differences, force production and CSA are difficult because of limited studies and equivocal results among these studies. Some studies have also examined the impact of aging on F/CSA. These studies seem to follow the same pattern as studies on sex differences and training status, with data suggesting that F/CSA varies unpredictably across ages and that differences may be attributed to factors other than age alone. In the papers reviewed, the relationship between force and CSA is neither consistent nor simple. Although some of the discrepancies between studies could be attributed to methodological variations, this does not seem likely to explain all differences. The F/CSA relationship seems complex, and future studies are required to elucidate the relationships among key factors in the expression of strength.

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Acknowledgements

The authors received no funding for the preparation of this review and have no conflicts of interest directly relevant to its contents.

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Authors and Affiliations

  1. Department of Kinesiology and Health Science, Stephen F. Austin State University, 75962-3015, Nacogdoches, Texas, USA

    Eric J. Jones

  2. Human Performance Laboratory, University of Alabama, Tuscaloosa, Alabama, USA

    Phil A. Bishop, Amanda K. Woods & James M. Green

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  1. Eric J. Jones
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Jones, E.J., Bishop, P.A., Woods, A.K. et al. Cross-Sectional Area and Muscular Strength. Sports Med 38, 987–994 (2008). https://doi.org/10.2165/00007256-200838120-00003

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