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Int J Sports Med 2020; 41(06): 349-359
DOI: 10.1055/a-1121-7851
Review
© Georg Thieme Verlag KG Stuttgart · New York

Human Skeletal Muscle Mitochondrial Adaptations Following Resistance Exercise Training

Hailey A. Parry
1   School of Kinesiology, Auburn University, Auburn, United States
,
Michael D. Roberts
1   School of Kinesiology, Auburn University, Auburn, United States
,
Andreas N. Kavazis
1   School of Kinesiology, Auburn University, Auburn, United States
› Author Affiliations
Further Information

Publication History



accepted 31 January 2020

Publication Date:
11 March 2020 (online)

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Abstract

It is universally accepted that resistance training promotes increases in muscle strength and hypertrophy in younger and older populations. Although less investigated, studies largely suggest resistance training results in lower skeletal muscle mitochondrial volume; a phenomenon which has been described as a “dilution of the mitochondrial volume” via resistance training. While this phenomenon is poorly understood, it is likely a result of muscle fiber hypertrophy outpacing mitochondrial biogenesis. Critically, there is no evidence to suggest resistance training promotes a net loss in mitochondria. Further, given the numerous reports suggesting resistance training does not decrease and may even increase VO2max in previously untrained individuals, it is plausible certain aspects of mitochondrial function may be enhanced with resistance training, and this area warrants further research consideration. Finally, there are emerging data suggesting resistance training may affect mitochondrial dynamics. The current review will provide an in-depth discussion of these topics and posit future research directions which can further our understanding of how resistance training may affect skeletal muscle mitochondrial physiology.

Key words

mitochondrial physiology - hypertrophy - myofiber - citrate synthase
 

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