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:9/30/2014)... news release is available in German . ... are among the most expensive foods in the world. Because ... find them. But the distinctive smell of truffles is not ... French scientists under the direction of the Goethe University Frankfurt ... produced by soil bacteria which are trapped inside truffle fruiting ...
(Date:9/30/2014)... goes wrong with your muscles because of age, disease or ... is. That,s where a new research report published in the ... comes in. In the report, a team of scientists ... help scientists "see" which genes are active in an organ ... activity and that men have approximately 400 more active genes ...
(Date:9/30/2014)... suite of perilous threats in today,s ocean. From ... change, fragile coral ecosystems are disappearing at unprecedented ... species of corals surrounding the island of Moorea ... their tropical environment: coral guard-crabs. New research from ... Station scientist Seabird McKeon and the museum,s predoctoral ...
Breaking Biology News(10 mins):On the trail of the truffle flavor 2Scientists identify which genes are active in muscles of men and women 2Smithsonian scientists discover coral's best defender against an army of sea stars 2
... United States are changing and will face reduced growth ... this century, according to a study conducted by a ... of California, Santa Barbara; U.S. Geological Survey; and University ... Proceedings of the National Academy of Sciences ...
... It,s colds and flu season, and as any parent knows, ... New research using human-networking theory may give a clearer picture ... cold, influenza, whooping cough and SARS can spread through a ... With the help of 788 volunteers at a high ...
... ever, scientists have found a difference in the way males and ... that sexes likely use that difference to select their mates. ... team of researchers who found that male and female cichlid fishes ... as well. "It is difficult to say what colour ...
Cached Biology News:Drought and rising temperatures weaken southwest forests 2Human networking theory gives picture of infectious disease spread 2Human networking theory gives picture of infectious disease spread 3When it comes to selecting a mate, the eyes have it: Queen's University study 2
(Date:9/30/2014)... WASHINGTON D.C., September 30, 2014 Applying a ... of researchers at Harvard University has demonstrated the ... surface -- work that holds promise for making ... and detailing the sides of next-gen rocket ships ... When light passes through oil in water, it ...
(Date:9/30/2014)... analog of one of nature,s most efficient light-harvesting ... led by Alejandro Briseno of the University of ... developing long-sought polymer architecture to boost power-conversion efficiency ... devices. , Briseno, with colleagues and graduate ... University and Dresden University of Technology, Germany, report ...
(Date:9/30/2014)... Sept. 30, 2014 Report Details ... highest potential revenues Do you want to find ... you revenue predictions for those biological drugs from ... you find financial data, R&D trends, opportunities and ... sales forecasts to 2024 at overall world market, ...
(Date:9/30/2014)... 2014 Nematicide is a type of ... microscopic parasitic roundworms, found in massive quantities virtually ... and animals. Nematicides have tended to be broad-spectrum ... migration through the soil. A single gram of ... With more than 10,000 species classified, they are ...
Breaking Biology Technology:Taking thin films to the extreme 2Blades of grass inspire advance in organic solar cells 2Blades of grass inspire advance in organic solar cells 3Biosimilars and Follow-On Biologics: World Industry and Market Prospects 2014-2024 2Biosimilars and Follow-On Biologics: World Industry and Market Prospects 2014-2024 3Biosimilars and Follow-On Biologics: World Industry and Market Prospects 2014-2024 4Biosimilars and Follow-On Biologics: World Industry and Market Prospects 2014-2024 5Nematicides Market by Types (Fumigants, Organophosphates, Carbamate and Bio-Nematicides), Applications (Agrochemicals, Industrial, and Others), and Geography (North America, Europe, Asia-Pacific & ROW) - Global Trends & Forecasts to 2019 2
... Corp ., a Madison biotechnology company, has raised $1 million ... the total raised to $3 million in the past two ... verify the efficacy of two products: adhesives that bind tissues ... and medical device coatings that block bacterial adhesion to the ...
... - Sir Ken Robinson has many ... his point about creativity than the story of a little ... a senior advisor to the J. Paul Getty Trust ... creativity and innovation, told the story during a keynote address ...
... 1995, I gave a luncheon speech to the Chicago Bar ... st Century." At that time, many who attended ... that much faith in it. My argument was that the ... maxed out. Municipalities would have to become more creative to ...
Cached Biology Technology:Sir Ken Robinson: Companies, kids "get" innovation, but K-12 doesn't nurture it 2Sir Ken Robinson: Companies, kids "get" innovation, but K-12 doesn't nurture it 3Creativity, innovation extend to municipalities 2Creativity, innovation extend to municipalities 3Creativity, innovation extend to municipalities 4