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Bilateral multidirectional jumps with reactive jump-landings achieve osteogenic thresholds with and without instruction in premenopausal women.

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  • معلومة اضافية
    • Author-Supplied Keywords:
      Biomechanics
      Bone
      Ground reaction forces
      Impact exercise
    • Abstract:
      Currently jump-landing ground reaction forces have only been quantified in the vertical direction as a stimulus for bone development. This study quantified the full-spectrum of jump-landing force magnitudes (body weight's) and rates of strain (body weights per second) of bilateral multidirectional jumps (star jump and stride jump) with reactive jump-landings (i.e. jumping immediately after initial jump-landing) among premenopausal women. It was also of interest to quantify the influence of instruction on the magnitude and rate of the jump-landing ground reaction forces. Twenty-one women [Mean (SD): 43.3(5.9)yr; 69.4(9.6)kg; 167(5.5)cm; 27.5(8.7)% body fat] performed a jump testing session 'with instruction' followed by a jump testing session performed one week later with 'instruction withdrawn'. The resultant magnitudes (3.90 to 5.38, body weights) and rates of strain (192 to 329, body weights per second) for the jump-landings, performed on a force plate, exceeded previously determined osteogenic thresholds (>3body weight's and >43body weights per second, respectively). An instruction effect was observed for resultant (↑8% and ↑12%; P ≤.01) and vertical (↑8% and ↑7%; P ≤.01) ground reaction force's (Newtons and body weight, respectively) indicating learning/practice effects for these exercises. A jump-landing effect was observed, with larger peak rates of strain (↑29%; P <.0001, body weight per second) and peak forces (↑12% to ↑48%; P ≤.01, body weights) for the second jump-landing (post-reactive jump). These multidirectional bilateral jumps represent a unique training stimulus for premenopausal women and achieve osteogenic thresholds thought pre-requisite for bone growth and could be utilized in the development of osteogenic exercise programs. • Magnitudes and rates of strain for star and stride jump-landings exceeded osteogenic thresholds. • Landing forces increased after one instructed practice session indicating a learning effect. • Larger forces found for second jump-landing (jumping immediately after initial jump-landing). • Medio-lateral landing forces substantially greater in the star jump compared with the stride jump. • Anterio-posterior landing forces markedly greater in the stride jump compared with the star jump. [ABSTRACT FROM AUTHOR]
    • Abstract:
      Copyright of Clinical Biomechanics is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
    • Author Affiliations:
      1Department of Sport and Fitness, Faculty of Community Wellbeing and Development, Toi Ohomai Institute of Technology, Tauranga, New Zealand
      2Sports Performance Research Institute New Zealand (SPRINZ), AUT Millennium, Auckland, New Zealand
      3School of Exercise, Biomedical and Health Sciences, Edith Cowan University, Perth, Australia
      4Department of Kinesiology, Pennsylvania State University, PA, United States
    • ISSN:
      0268-0033
    • Accession Number:
      10.1016/j.clinbiomech.2019.12.025
    • Accession Number:
      142852745
  • Citations
    • ABNT:
      CLISSOLD, T. L. et al. Bilateral multidirectional jumps with reactive jump-landings achieve osteogenic thresholds with and without instruction in premenopausal women. Clinical Biomechanics, [s. l.], v. 73, p. 1–8, 2020. DOI 10.1016/j.clinbiomech.2019.12.025. Disponível em: http://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=asn&AN=142852745&custid=s8280428. Acesso em: 12 jul. 2020.
    • AMA:
      Clissold TL, Cronin JB, De Souza MJ, Wilson D, Winwood PW. Bilateral multidirectional jumps with reactive jump-landings achieve osteogenic thresholds with and without instruction in premenopausal women. Clinical Biomechanics. 2020;73:1-8. doi:10.1016/j.clinbiomech.2019.12.025.
    • AMA11:
      Clissold TL, Cronin JB, De Souza MJ, Wilson D, Winwood PW. Bilateral multidirectional jumps with reactive jump-landings achieve osteogenic thresholds with and without instruction in premenopausal women. Clinical Biomechanics. 2020;73:1-8. doi:10.1016/j.clinbiomech.2019.12.025
    • APA:
      Clissold, T. L., Cronin, J. B., De Souza, M. J., Wilson, D., & Winwood, P. W. (2020). Bilateral multidirectional jumps with reactive jump-landings achieve osteogenic thresholds with and without instruction in premenopausal women. Clinical Biomechanics, 73, 1–8. https://doi.org/10.1016/j.clinbiomech.2019.12.025
    • Chicago/Turabian: Author-Date:
      Clissold, Tracey L., John B. Cronin, Mary Jane De Souza, Daniel Wilson, and Paul W. Winwood. 2020. “Bilateral Multidirectional Jumps with Reactive Jump-Landings Achieve Osteogenic Thresholds with and without Instruction in Premenopausal Women.” Clinical Biomechanics 73 (March): 1–8. doi:10.1016/j.clinbiomech.2019.12.025.
    • Harvard:
      Clissold, T. L. et al. (2020) ‘Bilateral multidirectional jumps with reactive jump-landings achieve osteogenic thresholds with and without instruction in premenopausal women’, Clinical Biomechanics, 73, pp. 1–8. doi: 10.1016/j.clinbiomech.2019.12.025.
    • Harvard: Australian:
      Clissold, TL, Cronin, JB, De Souza, MJ, Wilson, D & Winwood, PW 2020, ‘Bilateral multidirectional jumps with reactive jump-landings achieve osteogenic thresholds with and without instruction in premenopausal women’, Clinical Biomechanics, vol. 73, pp. 1–8, viewed 12 July 2020, .
    • MLA:
      Clissold, Tracey L., et al. “Bilateral Multidirectional Jumps with Reactive Jump-Landings Achieve Osteogenic Thresholds with and without Instruction in Premenopausal Women.” Clinical Biomechanics, vol. 73, Mar. 2020, pp. 1–8. EBSCOhost, doi:10.1016/j.clinbiomech.2019.12.025.
    • Chicago/Turabian: Humanities:
      Clissold, Tracey L., John B. Cronin, Mary Jane De Souza, Daniel Wilson, and Paul W. Winwood. “Bilateral Multidirectional Jumps with Reactive Jump-Landings Achieve Osteogenic Thresholds with and without Instruction in Premenopausal Women.” Clinical Biomechanics 73 (March 2020): 1–8. doi:10.1016/j.clinbiomech.2019.12.025.
    • Vancouver/ICMJE:
      Clissold TL, Cronin JB, De Souza MJ, Wilson D, Winwood PW. Bilateral multidirectional jumps with reactive jump-landings achieve osteogenic thresholds with and without instruction in premenopausal women. Clinical Biomechanics [Internet]. 2020 Mar [cited 2020 Jul 12];73:1–8. Available from: http://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=asn&AN=142852745&custid=s8280428