Navigation Links
Middle-aged men: Could dwindling testosterone levels decrease sleep?

Montreal, May 14, 2010 At 30 years old, male testosterone levels drop by one to two percent annually. By age 40, men's quality of sleep begins to diminish. Could there be a link between decreased testosterone and reduced sleep? Absolutely according to Zoran Sekerovic, a graduate student from the University of Montreal Department of Psychology, who presented his findings at the annual conference of the Association francophone pour le savoir (ACFAS).

Sekerovic discovered a link between testosterone levels in men over 50 and their quality of sleep specifically less deep sleep i.e. Phases III and IV of the slumber cycle. "Deep sleep is when the recuperation of body and mind is optimal," says Sekerovic, adding his is the first study to find this correlation.

In young men, deep sleep represents 10 to 20 percent of total sleep. By age 50, it decreases to five to seven percent. For men over 60, it can disappear altogether. The study didn't find any correlation with other parts of the sleep cycle: falling asleep, Phases I and II, or paradoxical sleep, when most of dreaming occurs.

The University of Montreal researcher explains that men in their 20s don't have such a correlation because their neuronal circuits are intact. "With age, there is neuronal loss and the synchronization of cerebral activity isn't as good, which is why there is a loss of deep sleep. Because deep sleep requires great synchronization," says Sekerovic. "Low levels of testosterone intensify the lack of synchronization and can explain 20 percent of men's inability to experience deep sleep."

Sekerovic suggests dwindling testosterone levels are what impact sleep, not vice-versa, as other studies have suggested. He adds previous investigations measured daily fluctuations in testosterone levels, which are higher in the morning.

If Sekerovic is right, his findings could re-ignite the hormone therapy debate. "The loss of deep sleep is a serious problem that could be treated with testosterone. That would be tremendous progress," says Sekerovic. "But hormone therapy can have secondary effects. Therefore, it will be essential to better understand the mechanisms leading to the loss of deep sleep."

This study was conducted under the supervision of Julie Carrier, a professor of psychology at the University of Montreal and director of the Chronobiology Laboratory at the Hpital du Sacr-Coeur de Montral.


Contact: Sylvain-Jacques Desjardins
University of Montreal

Related medicine news :

1. Middle-aged Americans report more mobility-related disabilities
2. Middle-aged Americans reporting more mobility related disabilities, study finds
3. Overweight middle-aged adults at greater risk for cognitive decline in later life
4. Sniff of local anesthetic in the dentists chair could replace the needle
5. Response to vaccines could depend on your sex
6. Enter One Year Auction Contest; You Could Win 5% of Winning Bid or Buy Now - $1 Million Option Proceeds
7. Ingredient in Dark Chocolate Could Guard Against Stroke
8. Gulf Oil Spill Could Threaten Human Health
9. Could the Pill Lower a Womans Sex Drive?
10. Duty of Care - New Driving Legislation Could Put You in Court! UKContractHireandLeasing spread the word on these new regulations
11. Stool DNA testing could play expanded role in colon cancer prevention
Post Your Comments:
(Date:11/27/2015)... ... November 27, 2015 , ... According to an article ... the way that they are handling security in light of the recent terrorist attacks ... in an attempt to stop an attack from reaching U.S. soil. Especially around special ...
(Date:11/27/2015)... ... November 27, 2015 , ... An ... way to dispense prescription medications at home, so he invented the patent-pending ELECTRONIC ... and dispense prescription medications. In doing so, it could help to prevent potential ...
(Date:11/27/2015)... ... November 27, 2015 , ... The ... of USA Today in Atlanta, Dallas, New York, Minneapolis, South Florida, with a ... component is distributed nationally, through a vast social media strategy and across a ...
(Date:11/27/2015)... ... November 27, 2015 , ... Consistent with ... the 2016 Building Better Radiology Marketing Programs meeting will showcase some ... March 6, 2016, at Caesars Palace in Las Vegas with a pre-conference session ...
(Date:11/27/2015)... ... November 27, 2015 , ... The moment you ... for not only fulfilling the needs of advisers and clients but going above ... and providing top-tier customer service. However, there's always room for improvement, which is ...
Breaking Medicine News(10 mins):
(Date:11/26/2015)... Países Bajos, November 26, 2015 ... fotodinámica de Bremachlorin para el cáncer avanzado.   ... con la terapia fotodinámica de Bremachlorin para el cáncer ... enfoque combina la inmunoterapia con la terapia fotodinámica de ... Clinical Cancer Research . --> Clinical Cancer ...
(Date:11/26/2015)... 26, 2015 ... aanpak combineert immunotherapie met Bremachlorin-photodynamische therapie voor ... ) --> ... ) Uit ... Centrum (LUMC) blijkt ...
(Date:11/26/2015)... 3D bioprinting market is expected ... new report by Grand View Research Inc. Rising prevalence of ... kidney transplantation is expected to boost the market growth, as ... transplantation. --> 3D bioprinting market is expected ... new report by Grand View Research Inc. Rising prevalence of ...
Breaking Medicine Technology: