Asfour S S, Ayoub M M, Mital A, Bethea N J
Am Ind Hyg Assoc J. 1983 Mar;44(3):223-8. doi: 10.1080/15298668391404680.
Ten trained male students between 18 and 28 years of age participated in a study, designed to determine the relationship between perceived exertion and physiological costs of exertion during various manual lifting and lowering tasks. Perceived exertion was defined as one's subjective rating of the intensity of work being performed. Five subjects performed lifting tasks and another five performed lowering tasks. Weight of load lifted or lowered (6.8, 13.6, 20.5 kg), frequency of lift or lower (3, 6, 9 times/min), height of lift or lower (floor to 76 cm, 76 to 127 cm, floor to 127 cm), box width (38, 66 cm), box length (38, 66 cm) and angle of twist of the body (0 degree, 90 degrees) were the independent variables studied. Heart rate, oxygen consumption, and ratings of perceived exertion (RPE) were the response measures. RPE was found almost linearly related to heart rate and oxygen consumption when lifting or lowering loads. For lifting tasks, the coefficient of correlation between RPE and heart rate was 0.673. In the case of lowering tasks, this coefficient was 0.604. When oxygen consumption was considered, the corresponding coefficients for lifting and lowering were 0.734 and 0.619, respectively. The correlation of RPE with the physiological response variables indicates that the severity of manual materials handling tasks in industry can be evaluated quickly and inexpensively by using perceived exertion ratings (RPE).
10名年龄在18至28岁之间的受过训练的男学生参与了一项研究，该研究旨在确定在各种手动升降任务中，主观用力感觉与用力的生理成本之间的关系。主观用力感觉被定义为个人对正在进行的工作强度的主观评级。5名受试者进行提升任务，另外5名进行下降任务。所升降负载的重量（6.8、13.6、20.5千克）、升降频率（3、6、9次/分钟）、升降高度（地面到76厘米、76到127厘米、地面到127厘米）、箱子宽度（38、66厘米）、箱子长度（38、66厘米）以及身体扭转角度（0度、90度）是所研究的自变量。心率、耗氧量以及主观用力感觉评级（RPE）是反应指标。在升降负载时，发现主观用力感觉评级与心率和耗氧量几乎呈线性相关。对于提升任务，主观用力感觉评级与心率之间的相关系数为0.673。在下降任务中，该系数为0.604。当考虑耗氧量时，提升和下降任务的相应系数分别为0.734和0.619。主观用力感觉评级与生理反应变量之间的相关性表明，通过使用主观用力感觉评级（RPE），可以快速且低成本地评估工业中人工搬运任务的强度。
