Satyanarayana K, Naidu A N, Narasinga Rao B S
Am J Clin Nutr. 1979 Sep;32(9):1769-75. doi: 10.1093/ajcn/32.9.1769.
Clinical nutritional status and physical work capacity at submaximal level were assessed in 96 rural Hyderbad boys, 14 to 17 years of age. Data available on the previous nutritional status of these children when they were 5 years of age were used for classifying them into different nutritional grades. Factors responsible for undernutrition childhood continued to operate on later growth. Both height and weight at 5 years correlated well (P less than 0.001) with current height and weight. About 64% (P less than 0.001) of the variation in physical work capacity at a heart rate of 170/min (physical work capacity 170 kpm/min) could be explained by the differences in current body weight; habitual physical activity explained another 10% (P less than 0.001) of the variation. Malnutrition in early childhood continuing into adolescence could be considered to have adversely affected their work capacity by influencing their body weight. However, even severe undernutrition during childhood had no effect on work performance, when expressed in terms of unit weight. But for the same work load, undernourished subjects had to use significantly higher heart rate at moderate work level as compared to their counterparts.
对96名年龄在14至17岁的海得拉巴农村男孩进行了次最大运动水平下的临床营养状况和体力工作能力评估。利用这些儿童5岁时的既往营养状况数据将他们分为不同的营养等级。导致儿童期营养不良的因素在后期生长过程中继续起作用。5岁时的身高和体重与当前身高和体重相关性良好（P<0.001）。心率为170次/分钟时（体力工作能力为170千帕米/分钟），约64%（P<0.001）的体力工作能力差异可由当前体重差异解释；习惯性体力活动又解释了另外10%（P<0.001）的差异。幼儿期持续到青春期的营养不良可被认为通过影响体重对他们的工作能力产生了不利影响。然而，即使儿童期严重营养不良，以单位体重表示时对工作表现也没有影响。但对于相同的工作量，与营养良好的同龄人相比，营养不良的受试者在中等工作水平时必须使用明显更高的心率。
