Navigation Links
Sleep quantity affects morning testosterone levels in older men

The testosterone levels of healthy men decline as they get older. As sleep quality and quantity typically decrease with age, objectively measured differences in the amount of sleep a healthy older man gets can affect his level of testosterone in the morning, according to a study published in the April 1st issue of the journal SLEEP.

The study, conducted by Plamen Penev, MD, PhD, of the University of Chicago, focused on 12 healthy men between the ages of 64 and 74. Three morning blood samples were pooled for the measurement of total and free testosterone. In addition to overnight laboratory polysomnography, wrist activity monitoring for six-to-nine days were used to determine the amount of nighttime sleep of the participants in everyday life settings.

The main outcome levels were total sleep time and morning testosterone levels. Analyses revealed that the amount of nighttime sleep measured by polysomnography was an independent predictor of the subjects?morning total and free testosterone levels.

"The results of the study raise the possibility that older men who obtain less actual sleep during the night have lower blood testosterone levels in the morning," said Penev. "Although the findings suggest that how long a person sleeps may be an indicator of age-related changes in important hormone signals in the body, future studies are needed to determine the importance of these relationships for the health of older adults."

Recent studies associate lack of sleep with serious health problems such as an increased risk of depression, obesity, cardiovascular disease and diabetes.

Experts recommend that adults get between seven and eight hours of sleep each night to maintain good health and optimum performance.

Those who think they might have a sleep disorder are urged to discuss their problem with their primary care physician, who will issue a referral to a sleep specialist.

Source:American Academy of Sleep Medicine

Page: 1

Related biology news :

1. Researchers Identify Cause of Early Bird Sleep Disorder
2. Sleeping Sickness Epidemic Spreading in Uganda
3. Sleeping beauty plays a significant role in identifying cancer genes
4. Nighttime Dying Linked To Sleep Apnea From Brain Cell Loss
5. Sleeping sickness parasite shows how cells divide their insides
6. Sleep deprivation doubles risks of obesity in both children and adults
7. Sleep enforces the temporal sequence in memory
8. Sleep disturbances affect classroom performance
9. Sleepless for science: Flies show link between sleep, immune system in Stanford study
10. Quality not quantity important for immune response to HIV
11. Cytoplasm affects the number of vertebrae in carp-goldfish clones
Post Your Comments:

(Date:11/4/2015)... , November 4, 2015 ... market report published by Transparency Market Research "Home Security Solutions ... and Forecast 2015 - 2022", the global home security solutions ... bn by 2022. The market is estimated to expand ... from 2015 to 2022. Rising security needs among customers ...
(Date:10/29/2015)... , Oct. 29, 2015 Daon, a ... that it has released a new version of its ... in North America have already ... v4.0 also includes a FIDO UAF certified server ... already preparing to activate FIDO features. These customers include ...
(Date:10/29/2015)... Oct. 29, 2015 Today, LifeBEAM ... partnership with 2XU, a global leader in technical ... smart hat with advanced bio-sensing technology. The hat ... to monitor key biometrics to improve overall training ... the two companies will bring together the most advanced ...
Breaking Biology News(10 mins):
(Date:11/24/2015)... Malaysia , Nov. 24, 2015  Asia-Pacific ... contract research organisation (CRO) market. The trend of ... in lower margins but higher volume share for ... capacity and scale, however, margins in the CRO ... Organisation (CRO) Market ( ), finds ...
(Date:11/24/2015)... 2015 Cepheid (NASDAQ: CPHD ) today ... following conference, and invited investors to participate via webcast. ...      Tuesday, December 1, 2015 at 11.00 a.m. Eastern Time ...      Tuesday, December 1, 2015 at 11.00 a.m. Eastern Time ... New York, NY      Tuesday, December 1, 2015 ...
(Date:11/24/2015)... /CNW/ - iCo Therapeutics ("iCo" or "the Company") (TSX-V: ... the quarter ended September 30, 2015. Amounts, unless ... presented under International Financial Reporting Standards ("IFRS"). ... Andrew Rae , President & CEO of ... only value enriching for this clinical program, but ...
(Date:11/24/2015)... ... 2015 , ... International Society for Pharmaceutical Engineering (ISPE) closed ... events for pharmaceutical manufacturing: 2015 Annual Meeting. The conference took place in Philadelphia, ... number of attendees in more than a decade. , “The 2015 Annual ...
Breaking Biology Technology: