Navigation Links
Exposure to early evening sunlight in spring creates teenage night owls
Date:7/26/2010

Troy, NY In the spring, later sunset and extended daylight exposure delay bedtimes in teenagers, according to researchers at Rensselaer Polytechnic Institute's Lighting Research Center (LRC).

"Biologically, this increased exposure to early evening light in the spring delays the onset of nocturnal melatonin, a hormone that indicates to the body when it's nighttime," explains Mariana Figueiro, Ph.D., associate professor. "This extended exposure adds to the difficulties teens have falling asleep at a reasonable hour."

Over time when coupled with having to rise early for school, this delay in sleep onset may lead to teen sleep deprivation and mood changes, and increase risk of obesity and perhaps under-performance in school, according to Figueiro.

"This is a double-barreled problem for teenagers and their parents," says Figueiro. "In addition to the exposure to more evening daylight, many teens also contend with not getting enough morning light to stimulate the body's biological system, also delaying teens' bedtimes."

The new findings detailing the impact of early evening light in spring on melatonin onset and sleep times have just been published in Chronobiology International by Figueiro and LRC Director Mark Rea, Ph.D. The study found that 16 eighth-grade students from Algonquin Middle School in upstate New York experienced a delay in melatonin onset by an average of 20 minutes measured in one day in spring relative to one day in winter. Melatonin levels normally start rising two to three hours prior to a person falling asleep. The students also kept sleep logs as part of the study, which collectively showed a 16-minute average delay in reported sleep onset and a 15-minute average reduction in reported sleep duration measured in one day in spring relative to one day in winter.

Setting the Body's Clock

Patterns of light and dark are the main cues for synchronizing our internal biological clock
'/>"/>

Contact: Mary Cimo
cimom@rpi.edu
518-687-7174
Rensselaer Polytechnic Institute
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Exposure to secondhand smoke in the womb has lifelong impact
2. Leaded gasoline predominant source of lead exposure in latter 20th century
3. Prenatal exposure to BPA and DES may increase breast cancer risk
4. Experimental treatment protects monkeys from lethal Ebola virus post-exposure
5. Pesticide exposure may contribute to ADHD
6. Researchers find melanoma not caused by early UVA light exposure
7. Study: Carbon monoxide exposure can be reduced during routine anesthesia in kids
8. UV exposure has increased over the last 30 years, but stabilized since the mid-1990s
9. Mothers exposure to bisphenol A may increase childrens chances of asthma
10. Duke awarded up to $43 million to develop test for dirty bomb/radiation exposure
11. Exposure to young triggers new neuron creation in females exhibiting maternal behavior
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/31/2015)... , March 31, 2015  Elephant Talk Communications ... a global provider of Software Defined Network Architecture (ET ... announced total revenue of approximately $20.4 million for the ... restated $19.5 million for the year ended December 31, ... 2014, the Company had completed its multi-year transition away ...
(Date:3/24/2015)... 24, 2015 Research and Markets ( http://www.researchandmarkets.com/research/kvdtcw/face_and_voice ) ... - Global Strategic Business Report" report to their offering. ... Biometrics in US$ Thousands by the following Segments: Face Biometrics, and ... Canada , Japan , ... Middle East & Africa , and ...
(Date:3/23/2015)... ANGELES , March 23, 2015  In the ... Federal fraud case conviction losses. This figure accounts for ... which, according to The Nilson Report, exceeds $11 billion ... investigative tool after a crime has occurred. Investor ... and polygraph expert Joe Paolella partnered to ...
Breaking Biology News(10 mins):Elephant Talk Reports 2014 Fourth Quarter and Year End Financial Results 2Elephant Talk Reports 2014 Fourth Quarter and Year End Financial Results 3Elephant Talk Reports 2014 Fourth Quarter and Year End Financial Results 4Elephant Talk Reports 2014 Fourth Quarter and Year End Financial Results 5Elephant Talk Reports 2014 Fourth Quarter and Year End Financial Results 6Face and Voice Biometrics - Global Strategic Business Report 2015: Face Recognition Gains Prominence in Immigration Control 2Face and Voice Biometrics - Global Strategic Business Report 2015: Face Recognition Gains Prominence in Immigration Control 3Face and Voice Biometrics - Global Strategic Business Report 2015: Face Recognition Gains Prominence in Immigration Control 4Face and Voice Biometrics - Global Strategic Business Report 2015: Face Recognition Gains Prominence in Immigration Control 5Face and Voice Biometrics - Global Strategic Business Report 2015: Face Recognition Gains Prominence in Immigration Control 6Polygraph Test Now Used to Protect Investors From Fraud 2Polygraph Test Now Used to Protect Investors From Fraud 3
... all likely to blame for poisoning the waters being drained from ... is leaving behind -- also owes its contamination to a source ... environments that made their way en masse into the water as ... Florida professor who has spent years studying the harmful contaminants that ...
... conditions and diseases is both feasible and safe, report ... the approach in patients with advanced rheumatoid arthritis. The ... Proceedings of the National Academy of Sciences (PNAS), indicate ... block the destructive inflammation process that takes place within ...
... the number of voices they hear to the number ... have found. The finding indicates that numerical perception is ... of a particular sense, said the researchers. The experimental ... human infants, before they have a verbal capacity, understand ...
Cached Biology News:Toxic flood lifts lid on common urban pollution problem 2Toxic flood lifts lid on common urban pollution problem 3Results of world's first gene therapy trial for arthritis show approach safe, feasible 2Results of world's first gene therapy trial for arthritis show approach safe, feasible 3Results of world's first gene therapy trial for arthritis show approach safe, feasible 4Monkeys understand numbers across senses 2
(Date:4/17/2015)... Calif. , April 17, 2015 /PRNewswire/ ... received a SBIR grant from the National ... National Institutes of Health (NIH). The grant ... efforts in the development of breakthrough genomic ... using specially fabricated substrates. Centrillion has been ...
(Date:4/17/2015)... CIO Review ( http://www.cioreview.com ) has chosen MMIS ... and Life Science Technology Solution Providers 2015. The positioning ... for life sciences companies. , The annual list ... and members of CIO Review’s editorial board to recognize ... on our radar for some time now for stirring ...
(Date:4/17/2015)... , April 17, 2015  Guggenheim Securities, the investment ... announced the hiring of William Tanner as ... Mr. Tanner will start work at Guggenheim in ... office. "Bill brings a wealth ... to our experienced and highly acclaimed healthcare team," said ...
(Date:4/17/2015)... Global Stem Cells Group has ... 2015 April 27 - 29, 2015 in Boston. This ... areas of stem cell research including applications, biology, medicine, ... medicine. , The conference will address recent developments ... research in stem cell therapies, regenerative medicine, tissue engineering, ...
Breaking Biology Technology:MMIS Chosen by CIO Review as Top 20 Most Promising Pharma and Life Science Technology Solution Providers 2015 2Guggenheim Securities Hires Biotech Analyst William Tanner in Expansion of Healthcare Coverage 2Global Stem Cells Group To Join GTCbio Stem Cell and Regenerative Medicine Summit in Boston, April 27-29, 2015 2Global Stem Cells Group To Join GTCbio Stem Cell and Regenerative Medicine Summit in Boston, April 27-29, 2015 3
... Dec. 5 Senesco Technologies, Inc. ("Senesco" or the ... Development and License Agreement with the http://www.senesco.com ... of Harris Moran,s recently announced corporate restructuring. , ... reported that its parent company, Limagrain, restructured its vegetable ...
... HARBIN, China, Dec. 5 /PRNewswire-Asia-FirstCall/ -- China Sky One ... CSKI ), a leading,fully integrated pharmaceutical company ... announced today that Mr. Yan-Qing Liu,Chairman, CEO and President ... interview in today,s issue of The China Perspective. , ...
... 4 Researchers are taking a closer look at ... demonstrate that inhibiting this biological route suppresses tumor growth, ... The pathway is involved in angiogenesis, cell growth, differentiation, ... PI3/AKT/mTOR pathway, which plays a key role in cancer, ...
Cached Biology Technology:Senesco and Harris Moran Mutually Agree to Terminate Development and License Agreement Due to Restructuring 2Senesco and Harris Moran Mutually Agree to Terminate Development and License Agreement Due to Restructuring 3China Sky One Medical, Inc. Interviewed in The China Perspective 2China Sky One Medical, Inc. Interviewed in The China Perspective 3GEN Reports Growing Focus on PI3-Kinase Pathway in Cancer Research 2
... kit allows a rapid and efficient ... FLAG-tagged protein. The immunoprecipitation is performed ... a highly specific monoclonal antibody covalently ... of affinity resin allows an efficient ...
... CLS number is a new ... match Cornings product number. If ... order under the old Sigma-Aldrich ... service for assistance. ID clarifier: ...
... CromoCenSC is a chromogenic medium ... count of Salmonella (except S. thyphi) ... bacteria. ,The detection takes a maximum ... biochemical tests, no sterilization during preparation ...
This modular benchtop laminar flow hood forces air through a 99.99% efficient HEPA filter to create a clean processing area. Options include a work bench, ionizaing bar, and air velocity gauge....
Biology Products: