| Physical Inactivity is a Major Contributor to Ovariectomy-Induced Sarcopenia. | |
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MedLine Citation:
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PMID: 22261826 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Since the mechanism(s) underlying menopause-related sarcopenia remain unknown we aimed to investigate the role of physical inactivity in its etiology. Ovariectomized and sham-operated rats were allocated into 2 experimental groups: 1) sedentary-standard housing; and 2) exercise-housed with running wheel. After a 9-month experimental period, soleus muscle structure and biochemical properties were analyzed. No differences existed in muscle fibre size or ultrastructure between sedentary sham and ovariectomized animals housed in standard conditions. In the exercise groups, average daily running distance was 10-fold less in ovariectomized compared to sham-animals. Further, in exercised animals, soleus fibre size was smaller in ovariectomized compared to sham-animals. Nonetheless, compared to both sedentary groups, muscle fibre size was larger in the exercised ovariectomized animals. Our results indicate that ovariectomy-induced sarcopenia is not due to the loss of ovarian hormones per se, but is largely due to physical inactivity. |
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Authors:
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H Fonseca; S K Powers; D Gonçalves; A Santos; M P Mota; J A Duarte |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-1-19 |
Journal Detail:
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Title: International journal of sports medicine Volume: - ISSN: 1439-3964 ISO Abbreviation: - Publication Date: 2012 Jan |
Date Detail:
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Created Date: 2012-1-20 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8008349 Medline TA: Int J Sports Med Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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© Georg Thieme Verlag KG Stuttgart · New York. |
Affiliation:
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Biochemistry, Porto, Portugal. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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