AGE-RELATED DIFFERENCES IN KNEE MUSCLE STRENGTH IN NORMAL WOMEN
AGE-RELATED DIFFERENCES IN KNEE MUSCLE STRENGTH IN NORMAL WOMEN
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DOI：
10.1093/geronj/40.3.275
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发表时间：
1985-01-01
期刊：
影响因子：
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通讯作者：
MOLLINGER, LA
中科院分区：
文献类型：
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作者：
MURRAY, MP;DUTHIE, EH;MOLLINGER, LA
这项研究为86岁以下的女性提供了正常的膝关节肌力基线。在20至86岁的3个年龄组的72名正常健康女性中，测量了最大等距和动态（等速）收缩时的膝关节肌肉力量（扭矩）。根据膝关节位置的不同，最年长组的力量范围为最年轻组的56%至78%。等距收缩的强度值大于等速收缩（在36度时进行）。而伸肌的强度大约是屈肌的两倍。对于这两个肌肉群，产生的扭矩与膝盖成30度。屈曲度通常低于膝关节在45度或60度位置时产生的屈曲度。尽管在老年组中发现了明显的力量缺陷，但在常规的临床检查中，使用手动肌肉测试可能无法检测到这种相对虚弱。
This study provides normal baselines of knee muscle strength for women up to 86 yr of age. Knee muscle strength (torque) was measured during maximum isometric and dynamic (isokinetic) contractions in 72 normal healthy women in 3 age groups between 20 and 86 yr. Strength of the oldest group ranged from 56 to 78% of that in the youngest group, depending on knee joint position. Strength values were greater for isometric contractions than for isokinetic contractions (performed at 36.degree. per s) and were approixmately twice as great for the extensor as for the flexor muscles. For both muscle groups, the torque generated with the knee in 30.degree. of flexion was usually lower than that generated with the knee at the 45- or 60-degree position. Despite the significant deficit found in the strength of the oldest group, it is likely that this relative weakness would not be detected on routine clinical examination using manual muscle testing.