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:12/19/2014)... 18, 2014 Research and Markets ... the "iPhone 5S Fingerprint Sensor - Apple/AuthenTec ... to their offering. ... AuthenTec in July 2012, Apple introduced the fingerprint ... currently the only device of Apple incorporating such ...
(Date:12/19/2014)... , Dec. 18, 2014 Research and Markets ... of the "Micro Market Monitor: North America Perimeter ... http://photos.prnewswire.com/prnh/20130307/600769 The ... at a CAGR of 3.6% from 2014 to 2019. ... this market, Canada is expected ...
(Date:12/19/2014)... MOUNTAIN VIEW, Calif. , Dec. 18, 2014 /PRNewswire/ ... the publication of a study that pinpoints fine-scale differences ... the United States . Since immigrants ... the United States has served as ... study illuminates how American history and the ongoing mixing ...
Breaking Biology News(10 mins):iPhone 5S Fingerprint Sensor - Apple/AuthenTec TMDR92 & Sapphire - Technology Report 2Micro Market Monitor: North America Perimeter Security Systems Market (Intrusion Detection Sensor, Video Surveillance, Communication/Alarm and Notification, Access Control System) 2Micro Market Monitor: North America Perimeter Security Systems Market (Intrusion Detection Sensor, Video Surveillance, Communication/Alarm and Notification, Access Control System) 323andMe Study Sketches Genetic Portrait of the United States 223andMe Study Sketches Genetic Portrait of the United States 323andMe Study Sketches Genetic Portrait of the United States 4
... have discovered an unusual symbiosis between tiny single-celled algae ... role in marine ecosystems, fertilizing the oceans by taking ... form that other organisms can use. Details ... of Science , emerged from the investigation of ...
... Harbor, N.Y. During embryonic development in humans and ... clean of chemical modifications to DNA called epigenetic marks. ... In flowering plants the scenario is dramatically different. ... sometimes not until many years later. When they ...
... get plenty of folic acid around the time of conception ... nutrient may one day deserve a spot on the obstetrician,s ... amounts of choline a nutrient found in eggs and ... stress-related illnesses, such as mental health disturbances, and chronic conditions, ...
Cached Biology News:Unusual symbiosis discovered in marine microorganisms 2Unusual symbiosis discovered in marine microorganisms 3Unusual symbiosis discovered in marine microorganisms 4Scientists uncover mechanism by which plants inherit epigenetic modifications 2Scientists uncover mechanism by which plants inherit epigenetic modifications 3Nutrient in eggs and meat may influence gene expression from infancy to adulthood 2Nutrient in eggs and meat may influence gene expression from infancy to adulthood 3
(Date:12/17/2014)... (PRWEB) December 17, 2014 Ipsen ... IPN; ADR: IPSEY), today announced that ... to as Somatuline®) was approved by the U.S. ... of gastroenteropancreatic neuroendocrine tumors (GEP-NETs) in adult patients ... or metastatic disease to improve progression-free survival (PFS). ...
(Date:12/17/2014)... Xeno Diagnostics has again received an ... COLA inspection. Xeno has met all criteria for ... organization. Accreditation is earned only by laboratories that ... demonstrate continued accuracy in the performance of proficiency ... , While the Laboratory Excellence award ...
(Date:12/17/2014)... Dec. 16, 2014  Vermillion, Inc. (NASDAQ: ... disease, today announced the next step in its expanded ... solutions provider with the naming of current Chief Operating ... Executive Officer, while current Chairman of the Board and ... as Chairman. These changes are effective January 1, 2015. ...
(Date:12/17/2014)... 17, 2014 Tigercat Pharma, Inc. today ... evaluating the investigational oral NK-1 receptor antagonist VPD-737 ... chronic itch who are unresponsive or inadequately responsive ... steroids and antihistamines. The primary ... Scale (VAS) itch score from baseline, comparing drug ...
Breaking Biology Technology:Ipsen Announces the FDA Approval of Somatuline® Depot® (lanreotide) Injection for the Treatment of Gastroenteropancreatic Neuroendocrine Tumors 2Ipsen Announces the FDA Approval of Somatuline® Depot® (lanreotide) Injection for the Treatment of Gastroenteropancreatic Neuroendocrine Tumors 3Ipsen Announces the FDA Approval of Somatuline® Depot® (lanreotide) Injection for the Treatment of Gastroenteropancreatic Neuroendocrine Tumors 4Ipsen Announces the FDA Approval of Somatuline® Depot® (lanreotide) Injection for the Treatment of Gastroenteropancreatic Neuroendocrine Tumors 5Ipsen Announces the FDA Approval of Somatuline® Depot® (lanreotide) Injection for the Treatment of Gastroenteropancreatic Neuroendocrine Tumors 6Ipsen Announces the FDA Approval of Somatuline® Depot® (lanreotide) Injection for the Treatment of Gastroenteropancreatic Neuroendocrine Tumors 7Ipsen Announces the FDA Approval of Somatuline® Depot® (lanreotide) Injection for the Treatment of Gastroenteropancreatic Neuroendocrine Tumors 8Xeno Diagnostics Receives 3rd Award for Laboratory Excellence 2Vermillion Names Valerie Palmieri CEO; James LaFrance to continue as Chairman of Board 2Vermillion Names Valerie Palmieri CEO; James LaFrance to continue as Chairman of Board 3Vermillion Names Valerie Palmieri CEO; James LaFrance to continue as Chairman of Board 4Velocity Pharmaceutical Development, LLC and Tigercat Pharma, Inc. Announce Phase 2 Results for VPD-737 in Patients With Chronic Pruritus 2Velocity Pharmaceutical Development, LLC and Tigercat Pharma, Inc. Announce Phase 2 Results for VPD-737 in Patients With Chronic Pruritus 3Velocity Pharmaceutical Development, LLC and Tigercat Pharma, Inc. Announce Phase 2 Results for VPD-737 in Patients With Chronic Pruritus 4
... Biotech Inc. (TSX: ONC, NASDAQ: ONCY ) ... U.K. trial of REOLYSIN(R) combined with paclitaxel/carboplatin for patients ... Meeting on Replicating Oncolytic Virus Therapeutics. The meeting is ... 22nd, 2009. The principal investigator for the trial is ...
... Endoscopy, Inc. (Pink Sheets: SNDY) is pleased to ... with Lifeline Biotechnologies, Inc. (Pink Sheets: LLBO) to ... Lifeline Biotechnologies for a combination of stock, assumption ... originally purchased the products from Lifeline Biotechnologies in ...
... Inc. (OTC Bulletin Board: OXBO) today announced the expansion of ... Melville Engle to the board.Engle has over 27 years experience ... money on Wall Street, launched hundreds of products, and has ... Dey LP, where he was the firm,s president and CEO. ...
Cached Biology Technology:Oncolytics Biotech(R) Inc. Collaborators Present Positive Head and Neck Results in Phase I/II Combination REOLYSIN(R) and Paclitaxel/Carboplatin Trial 2Oncolytics Biotech(R) Inc. Collaborators Present Positive Head and Neck Results in Phase I/II Combination REOLYSIN(R) and Paclitaxel/Carboplatin Trial 3Solos Endoscopy, Inc. Sells Ovascope and Mastascope Product Line to Lifeline Biotechnologies, Inc. 2Oxygen Biotherapeutics, Inc. Expands Board of Directors 2
... StabilZyme HRP Conjugate Stabilizer is an aqueous ... and other non-toxic stabilizing chemicals in a ... 6.7. This product contains a ... 20 ppm Proclin 300 (Rohm and Haas ...
Preparation Note: Prepared by method of Wimmer, E., et al., Biochemistry, 7, 2623 (1968). Quality Clarifier: Acceptor Activity: approx. 1000 picomoles phenylalanine per A 260 unit (not determined b...
This buffer is Specifically formulated to be used with Endogen's Poly-HRP Streptavidin...
... V-106 voice-coil scanning and positioning system ... samples have to be positioned or ... resolution. It provides superior responsiveness compared ... The mechanics (X or XY stage) ...
Biology Products: