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一、热量美国国家研究理事会(NRC)和联合国粮农组织(FAO)规定的热能需要量应该能够满足人体在较长时间内,维持体重、生长速度和增进健康所需的热能,以及在应激条件下满足热能增加的需要,以保证人体正常生长和劳动所需。 NRC每4年公布一次每天膳食需要量(表1),包括男女各年龄组。需要量的测定是在个体从事中等体力劳动,环境温度为20℃的条件下进行的,所以,可以根据年龄、身材、体力活动强度和环境温度对需要量进行适当的调整。例如:体力活动强度的增加或者消耗增加将导致各种营养素相应增加,表1表明一个成年男子每天消耗热量可达4500Kcal,蛋白质可从54g增加到81g,硫胺素从1.5mg增加
1. Calories The NRC and FAO requirements for heat energy should be able to meet the body’s long-term needs of maintaining weight, growth rate and health, as well as heat stress during stress Conditions to meet the needs of increased heat to ensure normal human growth and labor required. The NRC publishes a daily dietary requirement every four years (Table 1), covering all age groups. The determination of the amount of demand is carried out in the individual engaged in moderate manual labor, the ambient temperature is 20 ℃ conditions, so you can according to age, body, physical activity intensity and ambient temperature on the need to make appropriate adjustments. For example, an increase in physical activity intensity or an increase in consumption leads to a corresponding increase in various nutrients. Table 1 shows that an adult man consumes 4500 kcal of calories per day, an increase of protein from 54 g to 81 g and an increase of thiamine from 1.5 mg