Spurr G B, Maksud M G, Barac-Nieto M
Am J Clin Nutr. 1977 Oct;30(10):1740-6. doi: 10.1093/ajcn/30.10.1740.
VO2, E and heart rates (fH) were measured in 28 Colombian sugarcane loaders while loading cane and in the laboratory during a VO2max test. Productivity (metric tons-day-1) of the workers was also obtained. During work, VO2 was 1.251-min-1, VE 38.81 min-1, and fH 120 beats-min-1. The subjects worked at 42% of VO2max (6.3 +/- 1.0 kcal-min-1) during the field measurement periods. Energy expenditure was estimated to average 3,281 kcal-24 hr-1. Productivity was higher in men with lower fat content, resting fH and fH at VO2 = 1.25 1-min-1, indicating a positive relationship between productivity and physical fitness. Productivity was not related to age but, since VO2max decreased with age, the relative effort required to maintain productivity increased in the older workers. Efficiency (kg cane loaded-1 VO2-1) and estimated sustained effort (percent VO2max) were not significantly correlated with productivity in this type of discontinuous, moderate work.
在28名哥伦比亚甘蔗装卸工人搬运甘蔗时以及在实验室进行最大摄氧量（VO2max）测试期间，测量了他们的VO2、每分通气量（E）和心率（fH）。还获取了这些工人的生产率（公吨/天）。工作期间，VO2为1.25升/分钟，VE为38.8升/分钟，fH为120次/分钟。在现场测量期间，受试者的工作强度为VO2max的42%（6.3±1.0千卡/分钟）。估计能量消耗平均为3281千卡/24小时。脂肪含量较低、静息心率以及VO2为1.25升/分钟时心率较低的男性生产率较高，这表明生产率与身体素质之间存在正相关关系。生产率与年龄无关，但是，由于VO2max随年龄下降，老年工人维持生产率所需的相对努力增加。在这种不连续的中等强度工作中，效率（每消耗1升VO2所装卸的甘蔗千克数）和估计的持续努力程度（VO2max的百分比）与生产率没有显著相关性。
