Navigation Links
Sleep mode: The energy cost of sleep deprivation
Date:1/12/2011

The findings show that missing a night of sleep burns roughly 135 calories, the equivalent of two slices of bread or a 225 ml glass of semi-skimmed milk. In terms of physical exertion, this amounts to walking just under two miles. On the flip side, eight hours of sleep saved the same approximate amount of energy.

'While the amount of energy saved during sleep may seem small, it was actually more than we expected,' says Professor Kenneth Wright, lead author of the study and Director of Colorado University's Sleep and Chronobiology Laboratory. 'If one considers the amount of positive energy storage needed to explain the obesity epidemic is 50 calories a day (Hill et al., 2003), the energy savings represented by sleep is physiologically meaningful.'

The tightly controlled study included seven carefully vetted young adult subjects, with the participants required to stay in bed and follow a weight maintenance diet for the entire three-day duration. The first day established baseline data and consisted of a typical 16 hours of wakefulness followed by eight hours of sleep. Days two and three included 40 hours of total sleep deprivation followed by eight hours of recovery sleep.

The findings showed that compared to a typical night of sleep, the amount of energy expended by the subjects during 24 hours of sleep deprivation increased about seven per cent. In contrast, energy expenditure decreased to five per cent during the recovery episode, which included 16 hours of wakefulness (following the sleep deprivation night), then eight hours of recovery sleep.

The study proves there is a direct correlation between the sleepwake cycle and how the body uses energy. It also demonstrates that sleep deprivation is metabolically costly. 'The function of sleep, especially in humans, is considered one of the most important scientific enigmas,' commented Wright, who hopes the new data will help researchers better understand one piece of the sleep pu
'/>"/>

Contact: Mary Arbuthnot
marbuthnot@physoc.org
44-020-726-95721
Wiley-Blackwell
Source:Eurekalert

Page: 1 2

Related biology news :

1. Metabolic cost of human sleep deprivation quantified by University of Colorado team
2. The high price of sleep disorders
3. Lets not sleep on it
4. New sleep cycle discovery explains why fatty diets during pregnancy make kids obese
5. Analyzed relation between sleep disorders and risk perception by drivers with disorder
6. Researchers study sleep apnea and lack of oxygen
7. WSU researchers discover key mechanism behind sleep
8. New link between pollution, temperature and sleep-disordered breathing
9. Biologists identify genes regulating sleeping and feeding
10. HJF research psychologist receives Sleep Research Societys Young Investigator Award
11. Extremes of sleep related to increased fat around organs
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/1/2014)... of phloem, the conductive tissue through which plants transport ... cylindrical cells are capped at one end by a ... which in turn form a network throughout a plant,s ... cells which play an important role in carbon sequestration, ... their differentiation," says Professor Yk Helariutta from the Institute ...
(Date:8/1/2014)...  LiveScan Service Provider Binary Biometrics is pleased to welcome ... Biometrics will improve its mobile service capabilities and add more daily appointments, which ... and service several new cities such as, but not limited to, ... , Deltona , Edgewater , ... Smyrna Beach , Oak Hill , Orange ...
(Date:7/31/2014)... Foundation (NSF), counters a widely-held scientific view that ... that certain Arctic lakes store more greenhouse gases ... The study, published this week in the journal ... occur as permafrost thaws and creates surface depressions ... was previously frozen land into lakes. , The ...
Breaking Biology News(10 mins):Developmental regulation of important plant phloem components discovered 2Binary Biometrics, Founded by James Timothy White, Expands Services to 13+ Locations With the Addition of Owner/Operator Kevin Morris 2Binary Biometrics, Founded by James Timothy White, Expands Services to 13+ Locations With the Addition of Owner/Operator Kevin Morris 3Certain Arctic lakes store more greenhouse gases than they release 2
... Ore. Severe burn injuries in children have been shown to ... or fat tissues, a new clinical study has found. Stored ... weeks than might normally be possible in years. An analysis ... found they lost almost half of their stored vitamin E in ...
... their geographical ranges away from the equator or to higher ... many plants and animals, the ranges of others seem stable. ... amount of warming, it becomes more difficult for ecologists to ... these effects. In a study published this week in ...
... For the first time, researchers have discovered a disease mechanism ... "sporadic" form of ALS -- and points to a possible ... of publication in the journal Nature Neuroscience . ... motor neurons and death within three to five years of ...
Cached Biology News:Burn injuries rapidly deplete vitamin E 2Burn injuries rapidly deplete vitamin E 3Climate change may create tipping points for populations, not just species 2Link between 2 forms of ALS suggests drug target 2Link between 2 forms of ALS suggests drug target 3
(Date:8/1/2014)... 2014 AACC, a global scientific and medical ... unveiled an updated brand identity today that reflects the ... changing healthcare environment and continue to do what they ... get the care they need. " ... an essential role in saving lives and making people ...
(Date:8/1/2014)... Once a decision has been made ... will discuss how to define your tolerance for lowest ... Allen, Senior Director of Facilities Integration at Fluor Industrial ... Industrial Services, and special guest Carrier Li, Director in ... as they provide an examination of the Conceptual Design ...
(Date:7/31/2014)... CA (PRWEB) July 31, 2014 ... consumers, are increasingly searching for food alternatives that ... nutritional benefits. The food ingredient market has numerous ... players such as Vital Force Technology (VFT). ... more than 4,000 energetic patterns, all tested to ...
(Date:7/31/2014)... famous for a number of breakthroughs, which altered the ... a paper, which laid the foundation of computer science, ... He next played a pivotal role in the Second ... military codes, enabling the Allies to defeat the Nazis ... he turned his attention to artificial intelligence and proposed ...
Breaking Biology Technology:AACC Debuts Refreshed Brand Identity 2Defining Low Cost in Your Solution for Future Facilities, New Webinar for Pharma, Biotech, Medical Device and Healthcare Companies, Hosted by Xtalks 2Functional Ingredient Manufacturer – Vital Force Technology Infuses Raw Materials & Ingredients with Subtle Energy Formula 2A mathematical theory proposed by Alan Turing in 1952 can explain the formation of fingers 2A mathematical theory proposed by Alan Turing in 1952 can explain the formation of fingers 3
... Regulatory Affairs Professional Brings More Than Two ... Research Experience, CINCINNATI, Feb. 1 ... full-service clinical research organization, today,announced the hiring ... President, Global,Regulatory and Quality. Dr. Tripathi will ...
... Feb. 1 Gunther von Hagens, BODY WORLDS ... open at the Maryland,Science Center this Saturday, February ... of The Three Pound Gem, a special feature ... 200 anatomical specimens, including,whole bodies, healthy and unhealthy ...
... Corp. (Nasdaq: GENZ ) and Isis Pharmaceuticals, Inc. ... clearance under the,Hart-Scott-Rodino Antitrust Improvements Act for their collaboration, ... approval, Genzyme will pay,Isis $150 million to purchase five ... Upon completion of final contracts, Genzyme will pay ...
Cached Biology Technology:Kendle Hires Satish Tripathi, PhD, RAC as Vice President, Global Regulatory and Quality 2Maryland Science Center Unveils Anatomical Exhibition, Body Worlds 2, on Saturday, February 2 2Genzyme and Isis Announce Hart-Scott-Rodino Approval of Collaboration 2Genzyme and Isis Announce Hart-Scott-Rodino Approval of Collaboration 3Genzyme and Isis Announce Hart-Scott-Rodino Approval of Collaboration 4
Kit for BASE20/50 dual control unit, includes mounting plate, HOLDER50T, HEATERPAD50, SRTDX temperature probe(s)....
... Situ Assay Kit is a fluorescent-based assay ... undergoing apoptosis. The kit is for research ... or therapeutic procedures. CHEMICON®s CaspaTag™ Pan-Caspase In ... to detect active caspases. The methodology is ...
... This special concentrated jetSI 10 nM ... delivery into mouse brain as described in: ... Alfama, C. Giovannangeli, J.-P. Behr, and B.-A. ... gene expression in the mouse brain at ...
... INTERFERin is a new-generation siRNA transfection reagent ... at 1 nM siRNA in a wide ... excellent cell viability. Using low siRNA concentrations ... observed when transfecting siRNA at higher concentrations, ...
Biology Products: