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:
*Name:
*Comment:
*Email:
TAG: Sleep quantity affects morning testosterone levels older men

(Date:4/20/2015)... 20, 2015 The announcement comes ... Glenbeigh Records Management (GRM), Ireland,s foremost ... Bank. Having built up an impressive track record of clients ... player within the records management sector in Dubai ... is GCC staffbase and employ a further eight staff members ...
(Date:4/13/2015)...  higi, a leading cloud-based consumer engagement platform that ... with their communities around health and wellness, announced today ... API.  ... and convenient vehicle to receive validated health information from ... The API will allow higi,s trusted partners, on a ...
(Date:4/2/2015)... 2015 In the current ... outperforms the strongest competitors, showing outstanding performance in ... system is capable of a throughput of 5.000.000 ... to be ten times faster than most competitors ...      (Photo: http://photos.prnewswire.com/prnh/20150402/738673-a ) ...
Breaking Biology News(10 mins):Glenbeigh Records Management Wins Contract With Dubai Islamic Bank 2Glenbeigh Records Management Wins Contract With Dubai Islamic Bank 3higi Launches Seamless Access to HIPAA-Compliant Health Outcomes and Activity Data 2higi Launches Seamless Access to HIPAA-Compliant Health Outcomes and Activity Data 3DERMALOG AFIS Emerges as Performance Winner in NIST Benchmark Test 2DERMALOG AFIS Emerges as Performance Winner in NIST Benchmark Test 3
... scientific conditions and measures, Johns Hopkins researchers have ... can induce mystical/spiritual experiences descriptively identical to spontaneous ... The resulting experiences apparently prompt positive changes in ... least. , The agent, a plant alkaloid ...
... on Long Island have identified which among several different kinds ... the widely prescribed antidepressant Prozac. This discovery might enable a ... side effects, to be developed. , The findings also lay ... how, when, and where new neurons are generated from stem ...
... for the first time that embryonic stem (ES) cells ... capacity to produce viable offspring. The research, published in ... avenues for future studies, including investigation of mechanisms involved ... for infertility. , Previous studies have shown that ES ...
Cached Biology News:Hopkins scientists show hallucinogen in mushrooms creates universal 'mystical' experience 2Hopkins scientists show hallucinogen in mushrooms creates universal 'mystical' experience 3Hopkins scientists show hallucinogen in mushrooms creates universal 'mystical' experience 4Prozac's target revealed 2Sperm created in the laboratory from embryonic stem cells produce viable progeny 2
(Date:4/24/2015)... 24, 2015 Leading Regenerative Veterinary ... its allogeneic stem-cell product development program and changes ... the corporate strategic direction. , “I am extremely ... stem cell development program has been kicked into ... manufacturing facility and hiring of our new Director ...
(Date:4/24/2015)... PRINCETON, N.J. , April 24, 2015  Navitas Life ... Kumar as Head of Clinical and Regulatory Services. Shalabh ... having been a co-founder and CEO of Kinapse, as well ... Logo - http://photos.prnewswire.com/prnh/20150423/201261LOGO ... Jim Tizzard commented "I am delighted to welcome ...
(Date:4/23/2015)... Dora, Florida (PRWEB) April 23, 2015 ... that it intends to conduct a groundbreaking pilot ... begin to be reversed in as little as ... the science of metabolic and nutritional medicine—will aggressively ... that cripple and destroy our aging brain. These ...
(Date:4/23/2015)... 2015 WuXi PharmaTech (Cayman) Inc. (NYSE: ... platform company serving the pharmaceutical, biotechnology and medical device ... and the United States , today ... first quarter of 2015 after the New York Stock ... be Thursday morning, May 14, 2015 Shanghai time). The ...
Breaking Biology Technology:Vet-Stem, Inc. Meets New Milestones and Changes Name to VetStem Biopharma 2Shalabh Kumar Joins Navitas Life Sciences to Lead their Clinical and Regulatory Services Teams 2New Study Looks to Reverse Alzheimer’s Disease 2New Study Looks to Reverse Alzheimer’s Disease 3WuXi PharmaTech Schedules First-Quarter 2015 Earnings Release 2WuXi PharmaTech Schedules First-Quarter 2015 Earnings Release 3
... by Novartis to evaluate safety and efficacy of Albuferon ... patients with genotypes 2 and 3 hepatitis C -ROCKVILLE, ... HGSI ) today announced that Novartis has ... evaluate the safety and efficacy of Albuferon(R) (albinterferon alfa-2b) ...
... 12 /PRNewswire-Asia/ -- Simcere Pharmaceutical Group,(NYSE: ... branded generic,pharmaceuticals and manufacturer of the patented anti-cancer ... today announced preliminary revenue,and earnings for the full ... Based upon preliminary data for the fourth quarter, ...
... Pharmaceuticals, a pioneer in the development of novel products ... disease, announced that Ted Hibben has joined the company ... from Coley Pharmaceutical Group, where he was most recently ... played a key role in the company,s $233 million ...
Cached Biology Technology:Human Genome Sciences Announces Initiation of Phase 2b Trial of Albuferon(R) Dosed Monthly in Chronic Hepatitis C 2Human Genome Sciences Announces Initiation of Phase 2b Trial of Albuferon(R) Dosed Monthly in Chronic Hepatitis C 3Human Genome Sciences Announces Initiation of Phase 2b Trial of Albuferon(R) Dosed Monthly in Chronic Hepatitis C 4Human Genome Sciences Announces Initiation of Phase 2b Trial of Albuferon(R) Dosed Monthly in Chronic Hepatitis C 5Simcere Pharmaceutical Group Announces Preliminary Full Year Revenue and Earnings 2Cequent Names Ted Hibben Chief Business Officer 2Cequent Names Ted Hibben Chief Business Officer 3
Yersinia pestis...
... The features we add to WinList come ... product every day. Features like automatic region ... the result of good suggestions, thoughtful conversations, ... the features you depend on are still ...
Insect Cell Lysis Buffer 50 ml...
Recognizes the VZV nucleocapsid by indirect immunofluorescence and immunoprecipitation. Shows cross-reactivity to HSV....
Biology Products: