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[LH episodes in high performance sports]
A S Wolf1, R Benz, G Keckstein
1Universitäts-Frauenklinik Ulm.
Archives of Gynecology and Obstetrics
|January 1, 1989
Summary
Exercise impacts luteinizing hormone (LH) pulse frequency differently in trained versus untrained women. Trained women show increased LH pulse frequency, while untrained women experience decreased frequency due to hormonal changes.
Area of Science:
- Endocrinology
- Exercise Physiology
Context:
- Exercise can disrupt reproductive function, leading to conditions like exercise-amenorrhea.
- Hypothalamic factors are implicated in the hormonal changes associated with exercise-induced amenorrhea.
Purpose:
- To investigate the role of hypothalamic factors in exercise-amenorrhea.
- To compare hormonal responses to exercise in trained versus untrained women.
Summary:
- Luteinizing hormone (LH) pulse frequency was measured in 10 untrained and 6 trained women during rest and a 2-hour run.
- Trained women exhibited increased LH pulse frequency during exercise, linked to unaltered beta-endorphin and increased norepinephrine levels.
- Untrained women showed decreased LH pulse frequency, associated with increased beta-endorphin and norepinephrine.
Impact:
- Findings suggest differential regulation of reproductive hormones by exercise in trained and untrained individuals.
- This research contributes to understanding the neuroendocrine mechanisms underlying exercise-induced menstrual dysfunction.