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Menstrual dysfunction among habitual runners.

V E Cokkinades1, C A Macera, R R Pate

  • 1Department of Epidemiology & Biostatistics, School of Public Health, University of South Carolina, Columbia 29208.

Women & Health
|January 1, 1990
PubMed
Summary
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High mileage running may not cause menstrual irregularities in women. Pre-existing cycle issues, not weekly running volume, appear to be the primary factor. Further research is needed.

Area of Science:

  • Sports Medicine
  • Exercise Physiology
  • Women's Health

Background:

  • Menstrual dysfunction is a concern for female athletes.
  • The relationship between running mileage and menstrual regularity requires clarification.

Purpose of the Study:

  • To investigate the association between weekly running mileage and menstrual dysfunction in habitual women runners.
  • To determine if high mileage (≥30 miles/week) is linked to increased menstrual irregularities compared to lower mileage.

Main Methods:

  • Categorized habitual women runners into high mileage and low mileage groups.
  • Collected self-reported data on menstrual changes and weight loss.
  • Analyzed the frequency of menstrual irregularities (≥35 days between cycles) between groups.

Related Experiment Videos

Main Results:

  • Both high and low mileage runners reported menstrual changes and weight loss.
  • High mileage runners reported more menstrual irregularities initially (p = 0.001).
  • After controlling for pre-running cycle irregularity, the effect of mileage on menstrual regularity was not statistically significant.

Conclusions:

  • Pre-existing menstrual irregularity may be a more significant factor than weekly running mileage.
  • The study highlights the need to consider baseline menstrual health in female athletes.
  • Further research should explore confounding factors like stress, diet, and lifestyle in relation to exercise and menstrual health.