the hypothalamic-pituitary response to exercise was studied in 12 amenorrheic and in 9 eumenorrheic athletes by comparing the concentrations of corticotropin-releasing hormone ( crh ) , corticotropin ( acth ) , and endorphins ( beta-endorphin + beta-lipotropin ) in plasma at rest and during an acute exercise on a bicycle ergometer requiring 80 % and 100 % of the maximal oxygen uptake ( vo2 max ) .
C0020663
hypothalamic
C0010132
corticotropin-releasing hormone