Faculty of Health Sciences, University of Southampton, Building 45, Burgess Road, Highfield, Southampton SO17 1BJ, UK.
Arch Gerontol Geriatr. 2012 Mar-Apr;54(2):357-60. doi: 10.1016/j.archger.2011.03.009. Epub 2011 Apr 9.
Grip strength is a predictor of health outcomes but with differing rates of age-related decline in muscle strength, it is unclear whether handgrip is a reliable indicator of lower limb moments. This study investigated the relationship between grip strength and lower extremity moments in community-dwelling older adults. Eighty-two healthy volunteers aged 60-82 years (mean age 73.2 years) performed maximal voluntary contractions of knee and hip extensors and flexors at three positions and at neutral position for hip abductors and adductors using a custom-built dynamometer. Grip strength was measured using an electronic Jamar dynamometer. The relative reduction in muscle strength of 80s age category compared to 60-year-olds ranged from 14% for grip strength to 27% for hip abductors. Peak torque of flexors and extensors of the knee and hip joints were significantly correlated with grip strength and Pearson's correlation coefficients ranged from 0.56 to 0.78 with the highest correlations observed between knee moments and grip strength. "Good" correlation was found but only 31-60% of the variation in grip strength could be related to changes in joint torques. Hence the assumption that grip strength is an indicator of strength in the lower limb would seem unjustified in the healthy older adult.
握力是健康结果的预测指标，但由于肌肉力量随年龄的下降速度不同，握力是否可靠地反映下肢力矩尚不清楚。本研究调查了社区居住的老年人中握力与下肢力矩之间的关系。82 名健康志愿者年龄 60-82 岁（平均年龄 73.2 岁），使用定制的测力计在三个位置和髋关节外展和内收的中立位置进行最大自主收缩，测试膝关节和髋关节伸肌和屈肌的力量。握力使用电子 Jamar 测力计进行测量。与 60 岁相比，80 岁年龄段肌肉力量的相对下降幅度从握力的 14%到髋关节外展肌的 27%不等。膝关节和髋关节的屈肌和伸肌的峰值扭矩与握力显著相关，皮尔逊相关系数范围为 0.56 至 0.78，其中膝关节力矩与握力之间的相关性最高。发现了“良好”的相关性，但握力变化只有 31-60%可以与关节扭矩的变化相关。因此，在健康的老年人中，假设握力是下肢力量的指标似乎是没有根据的。
