Running induces menstrual disturbances but bone mass is unaffected, except in amenorrheic women.

@article{Hetland1993RunningIM,
  title={Running induces menstrual disturbances but bone mass is unaffected, except in amenorrheic women.},
  author={Merete Lund Hetland and Jens Haarbo and Claus Christiansen and Torben Thaning Larsen},
  journal={The American journal of medicine},
  year={1993},
  volume={95 1},
  pages={53-60}
}
PURPOSE To investigate the prevalence of exercise-related menstrual and sex hormonal disturbances and the effect of exercise on bone mass and metabolism in female runners at various training levels. SUBJECTS AND METHODS Two hundred five premenopausal women (running 0 to 140 km a week) were recruited from a large population of female runners who had responded to a questionnaire regarding exercise habits. Maximum oxygen uptake was determined by treadmill testing. Gynecologic status was assessed… CONTINUE READING