Navigation Links
New equation calculates cost of walking for first time
Date:11/12/2010

Any parent that takes their kid out for a walk knows that children tire more quickly than adults, but why is that? Do kids and small adults walk differently from taller people or do they tire faster for some other reason? Peter Weyand from Southern Methodist University, USA, is fascinated by the effect that body size has on physiological function. 'This goes back to Max Kleiber's work on resting metabolic rates for different sized animals. He found that the bigger you are the slower each gram of tissue uses energy,' explains Weyand, who adds, 'It's interesting to know how and why metabolism is regulated that way.' Intrigued by the question of why smaller people use more energy per kilogram body mass than larger individuals when walking, Weyand teamed up with Maurice Puyau and Nancy Butte, from the USDA/ARS Children's Nutrition Research Center at Baylor College of Medicine, and undergraduate Bethany Smith. Together they decided to measure the metabolic rates of children and adults, ranging from 5 to 32 years old, weighing between 15.9kg and 88.7kg and ranging in height from 1.07m to 1.83m, to try to find out why larger people are more economical walkers than smaller people. Weyand and his colleagues publish their discovery that walkers of all heights use the same amount of energy per stride, making short people less economical because they take more steps. They also derive a fundamental equation to calculate exactly how much energy walkers use with direct applications in all walks of life. The team publishes its discovery on 12 November 2010 in The Journal of Experimental Biology at http://jeb.biologists.org/cgi/content/abstract/213/23/3972.

First Weyand and colleagues filmed male and female volunteers as they walked on a treadmill at speeds ranging from a slow 0.4m/s up to 1.9m/s. Meanwhile, they simultaneously measured the walkers' oxygen consumption and carbon dioxide pro
'/>"/>

Contact: Kathryn Knight
kathryn@biologists.com
44-078-763-44333
The Company of Biologists
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. New equation of state of seawater
2. Notre Dame researcher helps discover walking properties of bacteria
3. Advances made in walking, running robots
4. Human use heel first gait because it is efficient for walking
5. Are high speed elephants running or walking?
6. Ladder-walking locusts show big brains arent always best
7. Bizarre walking bat has ancient heritage
8. X-rays offer first detailed look at hotspots for calcium-related disease
9. First peer-reviewed study finds BPA levels in US foods 1,000 times less than limits
10. Earths first great predator wasnt
11. Immune system assassins tricks visualised for the first time
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/29/2014)... Researchers at UC Davis have made some surprising ... infection. Studying simian immunodeficiency virus (SIV), the team ... Paneth cells are early responders to viral invasion ... producing a cytokine called interleukin-1 beta (IL-1β). ... IL-1β causes breakdown of the gut epithelium that ...
(Date:8/29/2014)... ANTONIO (Aug. 29, 2014) Scientists at the Barshop ... School of Medicine at the UT Health Science Center ... in the tissues of the longest-lived rodent, the naked ... in the cells of naked mole rats protects and ... for damaged and obsolete proteins. , The factor also ...
(Date:8/29/2014)... recently, little has been known about what genetic changes ... of scientists, one of whom is a University of ... that genes controlling the development of the brain and ... The study was published Aug. 28 in Science ... is online at http://www.sciencemag.org/ ., The domestication of ...
Breaking Biology News(10 mins):The early cost of HIV 2Factor in naked mole rat's cells enhances protein integrity 2New research reveals how wild rabbits were genetically transformed into tame rabbits 2New research reveals how wild rabbits were genetically transformed into tame rabbits 3
... fish, ants or birds, often move in surprising synchronicity ... a phenomenon which has remained puzzling to many researchers. ... New Journal of Physics (co-owned by the ... particle model to explain the collective decision making process ...
... 5:00 p.m. U.S. Eastern Time) A new peer-reviewed paper ... an ominous finding: most of the world,s last remaining ... clustered in just six percent of their available habitat. ... Asia that are now the last hope and greatest ...
... ROCKVILLE, Md. Members of the ... the nation,s energy challenges through fundamental research into biofuels. ... recently announced by the U.S. Department of Energy (DOE) ... projects with ASPB members as key research personnel, including ...
Cached Biology News:Understanding behavioral patterns: Why bird flocks move in unison 2Last strongholds for tigers identified in new study 2Last strongholds for tigers identified in new study 3Plant biologists lead biobased-fuel research projects 2
(Date:8/29/2014)... Aug. 29, 2014  Pfenex Inc. (NYSE MKT: ... development of high-value and difficult to manufacture proteins ... and reported financial results for the second quarter ... successful completion of our initial public offering, we ... biosimilar product candidates, derived from our proprietary protein ...
(Date:8/29/2014)... are based on electrons, but one of the most ... i.e. circuits based on light (photons) instead of electrons. ... a stream of single photons and control their direction. ... attempts to achieve this control, but now scientists at ... steady stream of photons emitted one at a time ...
(Date:8/29/2014)... August 29, 2014 The global ... billion in 2019. It is expected to grow ... 2019, and was valued at $1.8 billion in ... Transparency Market Research. , For more information regarding ... . , The research report, titled “Companion Diagnostics ...
(Date:8/29/2014)... 29, 2014 According to a new market ... global orthobiologics market was valued at USD 3,754.6 million in ... 5,519.9million in 2019at a CAGR of 5.9% from 2013 to ... and above is afflicted by bone and joint disorders, and ... 2020. This has and will continue to increase the demand ...
Breaking Biology Technology:Pfenex Reports Second Quarter 2014 Results and Provides Business Update 2Pfenex Reports Second Quarter 2014 Results and Provides Business Update 3Pfenex Reports Second Quarter 2014 Results and Provides Business Update 4Pfenex Reports Second Quarter 2014 Results and Provides Business Update 5Pfenex Reports Second Quarter 2014 Results and Provides Business Update 6Pfenex Reports Second Quarter 2014 Results and Provides Business Update 7Pfenex Reports Second Quarter 2014 Results and Provides Business Update 8Breakthrough in light sources for new quantum technology 2Companion Diagnostics Market to Hit $5.6 Billion in 2019: Transparency Market Research 2Companion Diagnostics Market to Hit $5.6 Billion in 2019: Transparency Market Research 3Global Orthobiologics Market to Reach $5,519.9 Million by 2019: Transparency Market Research 2Global Orthobiologics Market to Reach $5,519.9 Million by 2019: Transparency Market Research 3
... Medivation, Inc.,(Nasdaq: MDVN ) today announced that it ... second quarter 2008 progress and provide,a general business update ... A financial results press release for the second quarter ... on August 11, 2008., Interested parties may call ...
... Authors to Discuss Issue at International AIDS Conference, August ... exposure to or,transmission of HIV does nothing to reduce ... drives people away from accessing care,while disproportionately burdening women ... HIV status to partners for fear of violence,according to ...
... /Xinhua-PRNewswire-FirstCall/ --,Kiwa Bio-Tech Products Group Corporation (OTC ... (Shandong) Co., Ltd. (Kiwa Shandong),has received an ... Food,Certification Center (COFCC)., After a two-month ... Shandong,s products, the China Organic Food Certification ...
Cached Biology Technology:JAMA Commentary Opposes Criminal Punishment for HIV Exposure/Transmission 2JAMA Commentary Opposes Criminal Punishment for HIV Exposure/Transmission 3Kiwa Bio-Tech Receives Nationally Recognized Organic Products Certification 2Kiwa Bio-Tech Receives Nationally Recognized Organic Products Certification 3
...
Anti-ZFP-38/RU49 Family: Zinc Finger Peptide Sequence: SVKVEDKDFPSTCSKK...
...
... protein western blot (WtPAN) is ... specific protein expression in plant ... is included in each blot ... comparison between different western blots. ...
Biology Products: