Sperm counts and reproductive hormones in male marathoners and lean controls

Fertility and Sterility
C J Bagatell, W J Bremner

Abstract

In women, chronic and intense endurance exercise is frequently associated with menstrual cycle alterations. In men, the effects of similar amounts of exercise are less well-studied. We tested the hypothesis that endurance exercise in men is also associated with alterations in reproductive function. We studied 12 marathon runners and 12 age-matched, lean controls; serum and semen samples were collected every 2 weeks for 12 weeks. Sperm counts, sperm morphologies, and mean levels of testosterone (T), free T, sex hormone binding globulin, cortisol, follicle-stimulating hormone, and biologically active luteinizing hormone (LH) were similar in the two groups. Mean levels of immunologically active LH were somewhat higher in the marathoners. We conclude that this level of strenuous, long-term endurance exercise does not have major adverse effects on reproductive function in men.

Citations

Nov 4, 2000·Clinical Pediatrics·B Cromer, Z Harel
Feb 18, 1994·Annals of the New York Academy of Sciences·D C CummingV J Harber
Apr 22, 2003·American Journal of Human Biology : the Official Journal of the Human Biology Council·Peter T Ellison
Apr 17, 2018·Revista Andaluza De Medicina Del Deporte·D VaamondeA C Hackney
Oct 11, 2017·American Journal of Human Biology : the Official Journal of the Human Biology Council·Daniel P LongmanMichael P Muehlenbein
Dec 1, 1996·Journal of Applied Physiology·A LucíaJ C Legido
Mar 21, 2012·Endocrine·Luigi Di LuigiAndrea Lenzi
Sep 2, 2005·American Journal of Human Biology : the Official Journal of the Human Biology Council·Michael P Muehlenbein, Richard G Bribiescas
Jul 9, 2010·Current Opinion in Obstetrics & Gynecology·David L Olive
Mar 27, 2010·American Journal of Epidemiology·Tina Kold JensenNiels Jørgensen
Jan 24, 2019·Archives of Gynecology and Obstetrics·Jone Ibañez-PerezAfrica Garcia-Orad
Oct 27, 2015·Sports Medicine·Adam S TenfordeMichael Fredericson
Jan 29, 1999·Endocrinology and Metabolism Clinics of North America·F J HayesW F Crowley
Aug 10, 2021·Frontiers in Neurology·Lindsay FergusonMayumi L Prins

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