Nelson M E, Fisher E C, Catsos P D, Meredith C N, Turksoy R N, Evans W J
Am J Clin Nutr. 1986 Jun;43(6):910-6. doi: 10.1093/ajcn/43.6.910.
Our purpose was to determine the relationship of diet, exercise, and amenorrhea with bone mineral status in trained young women. Bone mineral density of the lumbar spine was significantly lower in amenorrheic compared to normally menstruating runners. Circulating estradiol was also significantly lower. No significant differences between the two groups were found in body composition, maximum aerobic power, or amount of training per week. A 3-day dietary record showed that the amenorrheic women reported a significantly lower daily energy intake, but no difference in the calcium intake. Protein intake was less than the US Recommended Dietary Allowance in 82% of amenorrheic women and 35% of eumenorrheic women. Abnormal eating behaviors may be associated with the development of amenorrhea. Our results show that when weight-bearing exercise and a low energy intake are associated with amenorrhea, the accretion of a large bone mass in young trained women is not favored.
我们的目的是确定饮食、运动和闭经与受过训练的年轻女性骨矿物质状况之间的关系。与月经正常的跑步者相比，闭经女性的腰椎骨矿物质密度显著更低。循环雌二醇水平也显著更低。两组在身体成分、最大有氧能力或每周训练量方面未发现显著差异。一份为期3天的饮食记录显示，闭经女性报告的每日能量摄入量显著更低，但钙摄入量没有差异。82%的闭经女性和35%的月经正常女性的蛋白质摄入量低于美国推荐膳食摄入量。异常饮食行为可能与闭经的发生有关。我们的结果表明，当负重运动和低能量摄入与闭经相关时，年轻的受过训练的女性大量骨质的积累并不占优势。
