Leg stiffness during hopping does not change with aging...9th World Conference of the International Society for Gerontechnology (ISG), June 18-21, 2014, Taipei, Taiwan.
Purpose During hopping, jumping and running, the musculoskeletal structure of the legs is often modelled with a spring-mass model, which consists of a body mass and a linear leg spring supporting the body mass1. In the model, the stiffness of the leg spring (leg stiffness; Kleg) is thought to be an...
| Publicado en: | Gerontechnology Vol. 13; no. 2; pp. 205 - 206 |
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| Autores principales: | , , |
| Formato: | abstract proceedings research tables/charts Journal Article |
| Publicado: |
International Society for Gerontechnology
2014 Special Issue
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=180444841&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 180444841 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 15691101 904R jtl: Gerontechnology issn: 15691101 maglogo: N pubinfo: dt: 2014 Special Issue vid: 13 iid: 2 pid: 54298 pub: International Society for Gerontechnology artinfo: ui: 180444841 180444841 180444841 10.4017/gt.2014.13.02.251.00 180444841 ppf: 205 ppct: 1 formats: tig: atl: Leg stiffness during hopping does not change with aging...9th World Conference of the International Society for Gerontechnology (ISG), June 18-21, 2014, Taipei, Taiwan. aug: au: HOBARA, H. KOBAYASHI, Y. MOCHIMARU, M. affil: National Institute of Advanced Industrial Science and Technology, Tokyo, Japan sug: subj: Hopping Leg Physiopathology Age Factors Aging Musculoskeletal System Physiology Congresses and Conferences Taiwan Taiwan Jumping Running Comparative Studies Kinematics ab: Purpose During hopping, jumping and running, the musculoskeletal structure of the legs is often modelled with a spring-mass model, which consists of a body mass and a linear leg spring supporting the body mass1. In the model, the stiffness of the leg spring (leg stiffness; Kleg) is thought to be an important factor in musculoskeletal performance2. However, despite the fact that many athlete's activities are often measured, little is known about the regulation of Kleg in the elderly. Therefore, the purpose of the present study was to compare the Kleg between the elderly and young subjects in a range of hopping frequency. Method Fourteen elderly and eleven young subjects performed in-place hopping, matching metronome beats at 2.2, 2.6 and 3.0Hz. Based on the spring-mass model, Kleg was calculated as the ratio of maximum ground reaction force to maximum center of mass displacement at the midstance (Figure 1). Results & Discussion In both groups, the Kleg increased with an increase in hopping frequency, but was not significantly different between groups (Figure 2). Statistical analysis revealed the existence of a significant main effect of hopping frequency on Kleg. However, main effect of groups and interaction on Kleg were not observed. The results of the present study indicate that leg stiffness during hopping is invariant with aging. Since too high or too low Kleg is associated with musculoskeletal injury2, footwear and/or surface materials, impact on Kleg2 should be considered for athletic environment in both master and young athletes. pubtype: Academic Journal doctype: abstract proceedings research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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