Chronic sleep curtailment is endemic in modern societies. The majority of the daily testosterone release in men occurs during sleep.
1 Sleep fragmentation and obstructive sleep apnea are associated with reduced testosterone levels.
2 In older men, morning testosterone levels are partly predicted by total sleep time.
3 Testosterone is critical in male sexual behavior and reproduction, but also has important beneficial effects on muscle mass and strength, adiposity, bone density, and vigor and well-being.
4 We investigated the effect of 1 week of sleep restriction on testosterone levels in young healthy men.
Leproult R, Van Cauter E.
JAMA. 2011 Jun 1;305(21):2173-4.
http://jama.ama-assn.org/content/305/21/2173
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