The relationship between sleep disorders and testosterone in men.

Area of Science:

• Endocrinology
• Sleep Medicine
• Men's Health

Background:

• Plasma testosterone exhibits circadian and ultradian rhythms, influenced by sleep and luteinizing hormone (LH) secretion.
• Sleep quality, duration, and circadian rhythm disruptions can negatively affect testosterone levels.
• The direct impact of sleep restriction or circadian disruption on testosterone, independent of SHBG or comorbidities, remains unclear.

Purpose of the Study:

• To investigate the relationship between sleep parameters and testosterone levels.
• To evaluate the effect of sleep disorders, such as obstructive sleep apnea (OSA), on testosterone.
• To assess the impact of continuous positive airway pressure (CPAP) and weight loss on testosterone in OSA patients.

Main Methods:

• Analysis of existing literature on sleep, circadian rhythms, and testosterone levels.
• Examination of studies on sleep disorders, including OSA, and their association with testosterone.
• Review of data on CPAP treatment and weight loss interventions in relation to testosterone levels.

Main Results:

• Testosterone increase is primarily sleep-dependent, requiring adequate sleep duration and architecture.
• Obstructive sleep apnea (OSA) does not appear to directly affect testosterone levels but may indirectly influence them via obesity.
• Weight loss effectively and predictably increases testosterone levels, whereas CPAP treatment shows inconsistent results.
• Testosterone replacement doses can improve sleep quality, while high-dose or abused testosterone can disrupt sleep.

Conclusions:

• Sleep quality and duration are crucial for maintaining optimal testosterone levels.
• Weight management is a more reliable strategy for increasing testosterone than CPAP treatment for OSA.
• Exogenous testosterone use, especially in high doses or abuse, can negatively impact sleep architecture and duration.