title: Testicular Function During Exhaustive Endurance Training.
abstract: In brief Exhaustive endurance training may suppress testicular function. This tentative conclusion was drawn from a study of six endurance athletes who underwent 2 weeks of prolonged running and cycling. No significant changes were noted for strength, weight, or body fat. However, persistent fatigue developed in all subjects. Their plasma testosterone decreased 17% (from 673 to 558 ng/dl, p <.05), and sperm count decreased, though not significantly. All reported a decline in sexual activity and sex drive, which may be related to the development of general fatigue and could be an early sign of overtraining stress.
authors.forename: R O
authors.initials: RO
authors.lastname: Griffith
authors.forename: R H
authors.initials: RH
authors.lastname: Dressendorfer
authors.forename: C D
authors.initials: CD
authors.lastname: Fullbright
authors.forename: C E
authors.initials: CE
authors.lastname: Wade