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目的探讨模拟失重对机体摄入营养状况和头发Ｚｎ、Ｃａ、Ｆｅ、Ｃｕ含量的影响。方法受试者－６°头低位卧床２１天，用称量法观察其营养素摄入量变化，记录卧床第１天、１１天和第２１天的体重、尿量和上臂围，同时收集受试者头发，用原子火焰吸收分光光度法测定头发Ｚｎ、Ｃａ、Ｆｅ、Ｃｕ元素的含量。结果膳食Ｚｎ、Ｃａ、Ｆｅ、Ｃｕ在模拟失重第２周降低，第３周后基本恢复正常。头发中的含量第１１天较第１天显著下降（Ｐ＜０．０１），第２１天恢复原来水平。尿量增加，体重和上臂围无明显变化。结论模拟失重对机体摄入营养状况和头发Ｚｎ、Ｃａ、Ｆｅ、Ｃｕ含量有短期影响，经过适应期后可恢复到正常范围。
Objective To investigate the effect of simulated weightlessness on intake of human body and the contents of Zn, Ca, Fe and Cu in hair. Methods Subjects were placed in bed at -6 ° low for 21 days. The changes of nutrient intake were observed by weighing method. The body weight, urine output and upper arm circumference were recorded on the 1st, 11th and 21st days of bed rest. Hair, Determination of hair Zn, Ca, Fe, Cu content by atomic flame absorption spectrophotometry. Results The dietary Zn, Ca, Fe and Cu decreased in the second week after simulated weightlessness and returned to normal in the third week. Hair content in the 11th day than the first day significantly decreased (P <0.01), the first 21 days to restore the original level. Increased urine output, body weight and arm circumference no significant change. Conclusion Simulated weightlessness has a short-term effect on nutritional status and Zn, Ca, Fe and Cu contents in the hair, and can return to the normal range after the adaptation period.