A technique for the assessment of individual dynamic strength and lifting capacity, known as 'Liftest', has been devised and tested in the USA by Kroemer. We sought to confirm, or otherwise, his estimates of the reliability of the test within sessions, and the applicability of the test in a heavy industry (coal mining). The coefficient of variation for maximal overhead lifts from a height of 24 cm by 19 healthy miners was 2·6% (c.f. Kroemer' s value of 3·2% for males), with a mean load of 48·1 kg. A psychophysically acceptable overhead lift, at a frequency of one a minute for a working day, was less reliable. All subjects, except one, were capable of loads in excess of Kroemer's recommended safe maximum for lifts to knuckle height. There was no problem with systematic errors, i.e. fatigue or a learning effect. We concluded that 'Liftest' was a reliable means of dynamic strength assessment for the overhead-reach lift.

译文

Kroemer在美国设计并测试了一种用于评估个人动态强度和起重能力的技术,称为 “举重”。我们试图以其他方式确认他对会议内测试可靠性的估计,以及该测试在重工业 (煤矿) 中的适用性。19名健康矿工从24厘米高度获得的最大高架举升的变异系数为2·6% (男性的c.f.Kroemer's值为3·2%),平均负荷为48·1千克。在心理上可以接受的高架升降机 (每天一分钟的频率) 不太可靠。除一名受试者外,所有受试者的负荷均超过Kroemer建议的最大安全负荷,以提升至转向节高度。系统错误没有问题,即乏力或学习效果。我们得出的结论是,“举升” 是对高架举升进行动态强度评估的可靠方法。

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