Sex differences in semitendinosus muscle fiber‐type composition

Sex differences in muscle fiber‐type composition have been documented in several muscle groups while the hamstring muscle fiber‐type composition has been poorly characterized. This study aimed to compare the semitendinosus muscle composition between men and women. Biopsy samples were obtained from t...

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Bibliographic Details
Published in:Scandinavian journal of medicine & science in sports 2022-04, Vol.32 (4), p.720-727
Main Authors: Fournier, Gaspard, Bernard, Clara, Cievet‐Bonfils, Maxime, Kenney, Raymond, Pingon, Maxime, Sappey‐Marinier, Elliot, Chazaud, Bénédicte, Gondin, Julien, Servien, Elvire
Format: Article
Language:English
Subjects:
Animals
Female
Gender differences
Hamstring Muscles
hamstrings
Human health and pathology
Knee
Life Sciences
Male
muscle biopsies
muscle composition
Muscle Fibers, Skeletal
Muscle, Skeletal
myosin heavy chain
Myosin Heavy Chains - genetics
Protein Isoforms
Sex Characteristics
Tissues and Organs
Women
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Summary:Sex differences in muscle fiber‐type composition have been documented in several muscle groups while the hamstring muscle fiber‐type composition has been poorly characterized. This study aimed to compare the semitendinosus muscle composition between men and women. Biopsy samples were obtained from the semitendinosus muscle of twelve men and twelve women during an anterior cruciate ligament reconstruction. SDH and ATPase activities as well as the size and the proportion of muscle fibers expressing myosin heavy chain (MyHC) isoforms were used to compare muscle composition between men and women. The proportion of SDH‐positive muscle fibers was significantly lower (37.4 ± 11.2% vs. 49.3 ± 10.6%, p 
ISSN:0905-7188
1600-0838
DOI:10.1111/sms.14127