Contractile behavior of the gastrocnemius medialis muscle during running in simulated hypogravity.
Journal
NPJ microgravity
ISSN: 2373-8065
Titre abrégé: NPJ Microgravity
Pays: United States
ID NLM: 101703605
Informations de publication
Date de publication:
09 Aug 2021
09 Aug 2021
Historique:
received:
03
11
2020
accepted:
11
06
2021
entrez:
10
8
2021
pubmed:
11
8
2021
medline:
11
8
2021
Statut:
epublish
Résumé
Vigorous exercise countermeasures in microgravity can largely attenuate muscular degeneration, albeit the extent of applied loading is key for the extent of muscle wasting. Running on the International Space Station is usually performed with maximum loads of 70% body weight (0.7 g). However, it has not been investigated how the reduced musculoskeletal loading affects muscle and series elastic element dynamics, and thereby force and power generation. Therefore, this study examined the effects of running on the vertical treadmill facility, a ground-based analog, at simulated 0.7 g on gastrocnemius medialis contractile behavior. The results reveal that fascicle-series elastic element behavior differs between simulated hypogravity and 1 g running. Whilst shorter peak series elastic element lengths at simulated 0.7 g appear to be the result of lower muscular and gravitational forces acting on it, increased fascicle lengths and decreased velocities could not be anticipated, but may inform the development of optimized running training in hypogravity. However, whether the alterations in contractile behavior precipitate musculoskeletal degeneration warrants further study.
Identifiants
pubmed: 34373462
doi: 10.1038/s41526-021-00155-7
pii: 10.1038/s41526-021-00155-7
pmc: PMC8352871
doi:
Types de publication
Journal Article
Langues
eng
Pagination
32Subventions
Organisme : Bundesministerium für Wirtschaft und Energie (Federal Ministry for Economic Affairs and Energy)
ID : 50WB1728
Informations de copyright
© 2021. The Author(s).
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