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Age Effects on Multi-muscle Modes during Voluntary Body Sway.

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  • معلومة اضافية
    • Author-Supplied Keywords:
      aging
      muscle modes
      posture
      principal component analysis
    • Abstract:
      The aim of this article was to explore age-related differences in the muscle modes (M-modes) during voluntary body sway (VS). M-modes were defined as trunk and leg muscles organized into groups with parallel scaling of muscle activation level within a group. We hypothesized that, in comparison with young performers, older adults would show changes in the compositions of M-modes stabilizing the anterior-posterior (AP) center of pressure (COP) displacement. Young (27.5 ± 7.3 yr, 164.6 ± 9.7 cm and 58.4 ± 10.6 kg) and older (69.4 ± 6.4 yr, 160.0 ± 7.0 cm and 58.9 ± 7.5 kg) subjects performed the VS task in the AP direction while trying to minimize sway in the medio-lateral direction. EMG signals of 10 postural muscles were recorded and analyzed. Principal component analysis (PCA) was used to identify three M-modes within the space of integrated indices of muscle activity. The main findings were (1) that there were no age-related differences in magnitude of the COP displacement or amount of variance explained by the principal components (m-modes), and (2) that the number of times co-contraction and mixed m-modes were used were significantly higher for older adults, and the number of times reciprocal m-modes were used were significantly higher for young adults. These observations suggest that aging is associated with a reduced ability to unite dorsal and ventral muscles of the body, which may be reflective of the CNS developing a useful strategy when faced with self-triggered perturbations. [ABSTRACT FROM AUTHOR]
    • Abstract:
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    • Author Affiliations:
      1Tianjin Key Lab of Exercise Physiology and Sports Medicine, Department of Health and Exercise Science, Tianjin University of Sport, Hexi District, Tianjin, China
      2Institute of Sports and Health Science, Kagamiyama, Higashi-Hiroshima, Japan
      3Department of Rehabilitation Science, Graduate School of Health Sciences, Hokkaido University, Sapporo, Japan
    • ISSN:
      1543-8627
    • Accession Number:
      10.1080/15438627.2014.975808
    • Accession Number:
      100717891
  • Citations
    • ABNT:
      WANG, Y.; WATANABE, K.; ASAKA, T. Age Effects on Multi-muscle Modes during Voluntary Body Sway. Research in Sports Medicine, [s. l.], v. 23, n. 1, p. 88–101, 2015. DOI 10.1080/15438627.2014.975808. Disponível em: http://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=asn&AN=100717891&custid=s8280428. Acesso em: 15 ago. 2020.
    • AMA:
      Wang Y, Watanabe K, Asaka T. Age Effects on Multi-muscle Modes during Voluntary Body Sway. Research in Sports Medicine. 2015;23(1):88-101. doi:10.1080/15438627.2014.975808
    • APA:
      Wang, Y., Watanabe, K., & Asaka, T. (2015). Age Effects on Multi-muscle Modes during Voluntary Body Sway. Research in Sports Medicine, 23(1), 88–101. https://doi.org/10.1080/15438627.2014.975808
    • Chicago/Turabian: Author-Date:
      Wang, Yun, Kazuhiko Watanabe, and Tadayoshi Asaka. 2015. “Age Effects on Multi-Muscle Modes during Voluntary Body Sway.” Research in Sports Medicine 23 (1): 88–101. doi:10.1080/15438627.2014.975808.
    • Harvard:
      Wang, Y., Watanabe, K. and Asaka, T. (2015) ‘Age Effects on Multi-muscle Modes during Voluntary Body Sway’, Research in Sports Medicine, 23(1), pp. 88–101. doi: 10.1080/15438627.2014.975808.
    • Harvard: Australian:
      Wang, Y, Watanabe, K & Asaka, T 2015, ‘Age Effects on Multi-muscle Modes during Voluntary Body Sway’, Research in Sports Medicine, vol. 23, no. 1, pp. 88–101, viewed 15 August 2020, .
    • MLA:
      Wang, Yun, et al. “Age Effects on Multi-Muscle Modes during Voluntary Body Sway.” Research in Sports Medicine, vol. 23, no. 1, Jan. 2015, pp. 88–101. EBSCOhost, doi:10.1080/15438627.2014.975808.
    • Chicago/Turabian: Humanities:
      Wang, Yun, Kazuhiko Watanabe, and Tadayoshi Asaka. “Age Effects on Multi-Muscle Modes during Voluntary Body Sway.” Research in Sports Medicine 23, no. 1 (January 2015): 88–101. doi:10.1080/15438627.2014.975808.
    • Vancouver/ICMJE:
      Wang Y, Watanabe K, Asaka T. Age Effects on Multi-muscle Modes during Voluntary Body Sway. Research in Sports Medicine [Internet]. 2015 Jan [cited 2020 Aug 15];23(1):88–101. Available from: http://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=asn&AN=100717891&custid=s8280428