Oja P, Louhevaara V, Korhonen O
Scand J Work Environ Health. 1977 Dec;3(4):225-33. doi: 10.5271/sjweh.2770.
The relative aerobic strain (RAS) of nonmotorized mail delivery was assessed in 54 Finnish mail carriers who represented both sexes, the entire workage range and both downtown and suburban delivery districts. The mean RAS of the entire delivery time was 55% of the maximal oxygen uptake (ml/kg-min). It was higher for women than for men, and higher for suburban than for downtown delivery. The RAS tended to increase systematically with age after the age of 50. The work strain of mail carriers of over 50 years of age, especially of older women carriers in suburban areas, was concluded to be high enough to lead to possible excessive strain on the workers.
对54名芬兰邮递员的非机动邮件投递相对有氧负荷（RAS）进行了评估，这些邮递员涵盖了不同性别、整个工作年龄段以及市区和郊区投递区域。整个投递时间的平均RAS为最大摄氧量（毫升/千克-分钟）的55%。女性的RAS高于男性，郊区投递的RAS高于市区投递。50岁以后，RAS往往随年龄系统性增加。得出结论，50岁以上邮递员的工作负荷，尤其是郊区年龄较大的女性邮递员，高到足以导致工人可能承受过度压力。
