Gonadotropin Pulsatllity in FemaIe Long Distance Runners
Abstract
With the increased popularity of endurance athletics among women, exercise-associated menstrual irregularities have become more common. The object of this study was to determine whether eumenorrheic (EU) runners demonstrate any degree of abnormality in pulsatile gonadotropin release when compared to EU sedentary controls and to identify changes that could signal disruption of normal menstrual cyclicity. Gonadotropin pulsatility was measured by taking venous samples every fifteen minutes for six hours in age and weight matched endurance athletes (N=10) and sedentary controls (N=9) during early follicular phase. Athletes performed a one hour treadmill run at 75% of maximum oxygen consumption immediately followed by a second six hour gonadotropin pulsatility assessment. Data collected on all subjects included a maximum EKG treadmill test, body fat analysis, and determination of serum progesterone (P), estradiol (E2), testosterone (T), cortisol (C), and Beta-endorphin (B-end) concentrations.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 24, 1986
- Accession Number
- ADA634965
Entities
People
- Janet Yu-yahiro
Organizations
- Uniformed Services University of the Health Sciences