Hamilton A, Balnave R, Adams R
Faculty of Health Sciences, University of Sydney, Australia.
J Hand Ther. 1994 Jul-Sep;7(3):163-70. doi: 10.1016/s0894-1130(12)80058-5.
The purpose of this study was to investigate the test-retest reliability of isometric grip strength testing using the Jamar dynamometer. Thirty-three subjects, 16 men (mean age = 37.4 years) and 17 women (mean age = 35.5 years), were assessed on two separate occasions using four methods to determine grip strength score. The methods used were (1) the score of one trial, (2) the mean score of two trials, (3) the mean score of three trials, and (4) the highest score of three trials. All five handle positions of the Jamar dynamometer were used during testing. Although still within the limits of acceptability, position 1 was significantly less reliable when compared with the other handle positions. Because the four methods of determining grip strength score were not significantly different in reliability, it was not possible to recommend any method as being more accurate. To analyze curve shape further, grip strength curves for the strongest and weakest men and women were compared by transforming points on the curves into percentages of the maximum value. Transformed curves for both strong and weak subjects were almost identical, indicating that, for this sample, "flattening" of the grip strength curves was a function of weak grip. The present data do not support the use of raw score curve shape as an indicator of sincerity of effort during grip strength testing.
本研究的目的是调查使用Jamar握力计进行等长握力测试的重测信度。33名受试者，16名男性（平均年龄 = 37.4岁）和17名女性（平均年龄 = 35.5岁），在两个不同的时间点接受评估，使用四种方法来确定握力得分。所使用的方法为：（1）一次测试的得分；（2）两次测试的平均得分；（3）三次测试的平均得分；（4）三次测试中的最高分。测试过程中使用了Jamar握力计的所有五个手柄位置。虽然仍在可接受范围内，但与其他手柄位置相比，位置1的可靠性明显较低。由于确定握力得分的四种方法在可靠性上没有显著差异，因此无法推荐任何一种方法更为准确。为了进一步分析曲线形状，通过将曲线上的点转换为最大值的百分比，比较了最强和最弱男性及女性的握力曲线。强壮和虚弱受试者的转换曲线几乎相同，表明对于该样本，握力曲线的“变平”是弱握力的一个函数。目前的数据不支持将原始得分曲线形状用作握力测试期间努力程度真实性的指标。
