Lane H W
Biomedical Operations and Research Branch, NASA-Johnson Space Center, Houston, TX 77058.
J Nutr. 1992 Jan;122(1):13-8. doi: 10.1093/jn/122.1.13.
Both the United States and the Soviet Union perform human space research. This paper reviews data available on energy metabolism in the microgravity of space flight. The level of energy utilization in space seems to be similar to that on Earth, as does energy availability. However, despite adequate intake of energy and protein and in-flight exercise, lean body mass was catabolized, as indicated by negative nitrogen balance. Metabolic studies during simulated microgravity (bed rest) and true microgravity in flight have shown changes in blood glucose, fatty acids and insulin concentrations, suggesting that energy metabolism may be altered during space flight. Future research should focus on the interactions of lean body mass, diet and exercise in space, and their roles in energy metabolism during space flight.
美国和苏联都进行了载人航天研究。本文回顾了有关太空飞行微重力环境下能量代谢的现有数据。太空飞行中的能量利用水平似乎与地球上的相似，能量供应情况也是如此。然而，尽管能量和蛋白质摄入充足且在飞行中有锻炼，但负氮平衡表明瘦体重仍被分解代谢。模拟微重力（卧床休息）和飞行中真实微重力状态下的代谢研究显示，血糖、脂肪酸和胰岛素浓度发生了变化，这表明太空飞行期间能量代谢可能会改变。未来的研究应聚焦于太空飞行中瘦体重、饮食和锻炼之间的相互作用，以及它们在太空飞行能量代谢中的作用。
