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首页> 外文期刊>The journals of gerontology.Series A. Biological sciences and medical sciences >Age-related differences in the force generation capabilities and tendon extensibilities of knee extensors and plantar flexors in men.
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Age-related differences in the force generation capabilities and tendon extensibilities of knee extensors and plantar flexors in men.

机译：与年龄相关的男性膝关节伸肌和足底屈肌力量产生能力和肌腱伸长能力的差异。

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BACKGROUND: Recently, the number of elderly individuals who participate in sports has increased, thus injuries from overuse are now becoming recognized in the elderly population. Therefore, it is important to determine which muscle groups and tendons are most affected with aging to plan appropriate exercise interventions for elderly individuals. In particular, muscles and tendons in knee extensors and plantar flexors play an important role during locomotion. The purpose of this study was to compare the knee extensor and plantar flexor muscles and tendons. METHODS: Young (n = 19) and elderly (n = 17) men performed isometric voluntary knee extension and plantar flexion contractions. Muscle thickness and elongation of tendon structures in knee extensors and plantar flexors were measured by ultrasonography. RESULTS: Relative muscle thickness (to limb length) in the elderly group was significantly lower than that in the young group in knee extensors (p <.001), although no significant difference was found between the two groups in plantar flexors (p =.063). Relative muscle strength (to body mass) in the elderly group was significantly lower than that in the young group in both sites (all p <.001). Ratio of muscle strength to muscle thickness in the elderly group was significantly lower than that in the young group in plantar flexors, but not in knee extensors. The elderly group had significantly lower maximal elongation and strain of tendon structures in both sites than the young group had. CONCLUSION: These results suggest that the age-related weakness in knee extensors may be attributed to muscle atrophy, whereas that in plantar flexors is not, and that elderly persons have less extensible tendon structures in both sites.
机译：背景技术：最近，参加体育运动的老年人人数增加了，因此，在老年人口中逐渐认识到过度使用造成的伤害。因此，重要的是要确定哪些肌肉群和肌腱最容易受到衰老的影响，从而为老年人制定适当的运动干预措施。特别地，在膝关节伸肌和足底屈肌中的肌肉和肌腱在运动中起重要作用。这项研究的目的是比较膝盖伸肌和足底屈肌和肌腱。方法：年轻（n = 19）和老年人（n = 17）男性进行等距的自愿性膝关节伸展和plant屈运动。超声检查膝关节伸肌和plant屈肌的肌层厚度和肌腱结构伸长率。结果：膝关节伸肌的老年组相对肌肉厚度（至肢长）显着低于青年组（p <.001），尽管两组之间的plant屈没有显着差异（p =。 063）。在这两个部位，老年组的相对肌肉力量（相对于体重）均显着低于青年组（均p <.001）。 elderly屈肌中老年人组的肌肉力量与肌肉厚度之比显着低于青年组，但在膝部伸肌中则没有。老年组的两个部位的最大伸长率和肌腱结构的应变均明显低于青年组。结论：这些结果表明，与年龄相关的膝关节伸肌无力可能归因于肌肉萎缩，而脚底屈肌不是肌萎缩，并且老年人在两个部位的肌腱结构均较不易伸展。

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