Durability of the reproductive axis in eumenorrheic women during 1 yr of endurance training.
Durability of the reproductive axis in eumenorrheic women during 1 yr of endurance training.
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月经正常的女性生殖轴在 1 年耐力训练期间的耐久性。
DOI：
10.1152/jappl.1992.72.4.1571
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发表时间：
1992
期刊：
影响因子：
--
通讯作者：
Dowling,E
中科院分区：
文献类型：
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作者：
Rogol,AD;Weltman,A;Weltman,JY;Seip,RL;Snead,DB;Levine,S;Haskvitz,EM;Thompson,DL;Schurrer,R;Dowling,E
一些进行耐力训练的女性会出现月经周期 (MC) 改变。我们假设前瞻性跑步计划会引起 MC 阶段长度和黄体生成素 (LH) 脉冲生理频率的改变和/或降低某些女性的 24 小时积分血清 LH 浓度。此外，我们假设，训练强度更大（高于乳酸阈值）的女性会在训练计划的早期或更大程度上表现出促性腺激素释放的变化。为了检验这些假设，我们研究了不同运动强度对生理和内分泌反应的影响。 23 名健康的月经正常的妇科成熟女性（月经初潮后年龄 17.8 +/- 0.9 岁）未经训练的女性以两种运动强度之一进行了为期 1 年的训练计划，一种运动强度对应于乳酸阈值 (LT)，另一种运动强度介于 LT 和峰值跑步速度之间，或作为对照。每个运动组的训练距离相同。每四次 MC 重复一次生理测量，以跟踪体能变化并重新调整训练速度。 MC 以及卵泡期和黄体期的长度是根据激素浓度确定的。测定身体成分、营养摄入和 LH 脉冲释放。女性跑了大约 790 英里。每组的生理状况都有所改善，其中 LT 组的改善程度更大。仅在大于 LT 组中观察到黄体期长度缩短不到 2 天。运动组之间的脉动 LH 释放的任何参数均未发现显着变化。尽管运动增加了能量消耗，但两组运动组的营养摄入均没有显着变化，身体成分也只有很小的变化。我们的结论是，中等距离和强度的渐进运动计划不会对妇科成熟的月经正常女性的强健生殖系统产生不利影响。
Menstrual cycle (MC) alterations occur in some endurance-training women. We hypothesized that a prospective running program would evoke alterations in MC phase lengths and in the physiological frequency of pulses of luteinizing hormone (LH) and/or diminish 24-h integrated serum LH concentrations in some women. In addition, we postulated that women who train more intensively (above the lactate threshold) would show alterations in gonadotropin release earlier in the training program or to a greater degree. To test these hypotheses, we examined the effects of different exercise intensities on physiological and endocrine responses. Twenty-three healthy eumenorrheic gynecologically mature (postmenarchal age 17.8 +/- 0.9 yr) untrained women undertook a 1-yr training program at one of two exercise intensities, one at a velocity corresponding to the lactate threshold (LT) and the other halfway between that of LT and peak running velocity, or served as controls. Training distance was the same in each exercise group. Physiological measurements were repeated every four MC to track changes in fitness and readjust training velocities. The lengths of the MC and the follicular and luteal phases were determined from hormonal concentrations. Body composition, nutritional intake, and pulsatile release of LH were determined. The women ran approximately 790 miles. Each group improved physiologically, with the greater than LT group improving to a greater degree. A less than 2-day decrease in the luteal phase length was observed only in the greater than LT group. No significant changes for any parameter of pulsatile LH release were noted between exercise groups. No significant changes in nutritional intake and only small changes in body composition were noted in either exercise group despite the added energy expenditure of exercise. We conclude that a progressive exercise program of moderate distance and intensity does not adversely affect the robust reproductive system of gynecologically mature eumenorrheic women.