HOME >> BIOLOGY >> NEWS
Human running on surfaces of different stiffnesses

eed and a 50 percent decrease in injuries.

The principles underlying the construction of these tracks rests with the expression of ksurf values - a combined measure of decreasing foot-ground contact time, increasing stride length, and decreasing the initial spike in peak vertical ground reaction force. Despite the success and popularity of these new tracks, the mechanisms resulting in enhanced performance are not clearly understood.

The team of Massachusetts researchers accepted the assumption that the running leg and surface could be represented as a simple spring and mass, with the leg spring having two stiffnesses (kleg and kvert)). The former is the actual leg stiffness describing the leg's musculoskeletal system during the support phrase and is calculated by the ratio of the peak vertical ground reaction force (the reaction to the force the body exerts on the ground) to the compression of the leg spring. The latter, kvert, is the vertical stiffness of the runner, providing the mechanism by which the direction of the downward velocity of the body is reversed during limb contact.

Previous studies have found that the knee joint is the major determinant for kleg as a function of speed in human running. Additional experimentation has revealed that a runner's center of mass deflection (maximum vertical displacement at the center of mass) remains constant regardless of the hardness of the surface, essentially the general principle of running mechanics. Therefore, by adjusting the leg spring to different surface values, the runner maintains uniform support mechanics.

To date, no research study has related the performance enhancements of running on surfaces with different stiffnesses to metabolic costs (the generating force necessary to support body weight).

The goal of the research study was to relate human running biomechanics to energetics (changes in energy to a physical or chemical reaction) on surfaces of differen
'"/>

Contact: Donna Krupa
djkrupa1@aol.com
703-527-7357
American Physiological Society
14-Mar-2002


Page: 1 2 3 4

Related biology news :

1. Human chromosome 5 final sequence analysis released to public
2. Humans march to a faster genetic drummer than primates, UC Riverside research says
3. Applied Mathematical Models in Human Physiology
4. Human health risks in space flight focus of research internships
5. Human periodontal ligament stem cells isolated for the first time
6. Organization for Human Brain Mapping 2004 Annual Meeting
7. 20 May AAAS lecture: Computers that Respond to Human Emotion
8. Human brain works heavy statistics learning language
9. New Woods Hole Center for Oceans and Human Health established
10. European Society of Human Reproduction and Embryology conference - June 2004
11. Human genome-wide RNAi library for biotech and pharma research

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:6/14/2017)... (NYSE: IBM ) is introducing several innovative partner startups ... collaboration between startups and global businesses, taking place in ... nine startups will showcase the solutions they have built with ... France is one of the ... percent increase in the number of startups created between 2012 ...
(Date:5/16/2017)... 16, 2017   Bridge Patient Portal , ... MD EMR Systems , an electronic medical ... GE, have established a partnership to build an ... the GE Centricity™ products, including Centricity Practice Solution ... These new integrations will allow healthcare delivery ...
(Date:4/19/2017)... New York , April 19, 2017 ... competitive, as its vendor landscape is marked by the ... the market is however held by five major players ... Safran. Together these companies accounted for nearly 61% of ... of the leading companies in the global military biometrics ...
Breaking Biology News(10 mins):
(Date:10/12/2017)... ... October 12, 2017 , ... ... platform specifically designed for life science researchers to analyze and interpret datasets, ... Franklin, who made a major contribution to the discovery of the double-helix ...
(Date:10/11/2017)... ... ... Personal eye wash is a basic first aid supply for any work environment, but most ... you rinse first if a dangerous substance enters both eyes? It’s one less decision, and ... unique dual eye piece. , “Whether its dirt and debris, or an acid or alkali, ...
(Date:10/11/2017)... , Oct. 11, 2017  VMS BioMarketing, a leading ... a nationwide oncology Clinical Nurse Educator (CNE) network, which will ... need for communication among health care professionals to enhance the ... nurses, office staff, and other health care professionals to help ... breast cancer. ...
(Date:10/11/2017)... ... October 11, 2017 , ... ... implantation and pregnancy rates in frozen and fresh in vitro fertilization (IVF) ... and maternal age to IVF success. , After comparing the results from the ...
Breaking Biology Technology:
Cached News: