Effect of menstrual status and exercise type on bone metabolism in female athletes. (English)

[Objective] This study was performed to investigate the effect of exercise type and menstrual status on bone metabolism in female athletes. [Methods] Twenty subjects participated in this study. They were divided into four groups : the control group (n = 7), eumenorrheic athlete group (judo player group, n = 6, long-distance runner group, n = 7), and irregular menstrual athlete groups (n = 7). Bone metabolism markers (bone formation marker ; BAP and bone resorption marker ; ICTP) were determined. [Results] The level of serum BAP in the eumenorrheic athlete groups was higher than that of the control group and the irregular menstrual athlete group, but did not show a significant difference between the judo player group and the long-distance group. The level of serum ICTP in the irregular menstrual athlete group was lower than that of the eumenorrheic athletes. In the irregular menstrual athlete group, the level of serum estradiol was lower than that of other groups ; therefore, they had low bone turnover status. [Conclusion] Bone formation in the eumenorrheic athlete is higher than that in the irregular menstrual athlete, although this result is not due to the impact of exercise type. These data suggest that in the irregular menstrual athlete, the low level of estradiol caused the lowered bone turnover status. [ABSTRACT FROM AUTHOR]

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