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:3/29/2017)... the health IT company that operates the largest health ... today announced a Series B investment from BlueCross BlueShield ... investment and acquisition accelerates higi,s strategy to create the ... activities through the collection and workflow integration of ambient ... secures data today on behalf of over 36 million ...
(Date:3/24/2017)... , March 24, 2017 The Controller General ... Controller Mr. Abdulla Algeen have received the prestigious international IAIR ... Continue Reading ... ... picture) and Deputy Controller Abdulla Algeen (small picture on the right) have ...
(Date:3/23/2017)... 2017 Research and Markets has announced the ... Trends - Industry Forecast to 2025" report to their offering. ... The Global ... of around 8.8% over the next decade to reach approximately $14.21 ... market estimates and forecasts for all the given segments on global ...
Breaking Biology News(10 mins):
(Date:10/12/2017)... ... 2017 , ... DuPont Pioneer and recently formed CasZyme, a ... a multiyear collaboration to identify and characterize novel CRISPR-Cas nucleases. The goal of ... across all applications. , Under the terms of the agreement, Pioneer will provide ...
(Date:10/11/2017)... ... October 11, 2017 , ... ... Andi Purple announced Dr. Suneel I. Sheikh, the co-founder, CEO and chief research ... Inc. has been selected for membership in ARCS Alumni Hall of Fame ...
(Date:10/11/2017)...  VMS BioMarketing, a leading provider of patient support solutions, ... Educator (CNE) network, which will launch this week. The VMS ... care professionals to enhance the patient care experience by delivering ... health care professionals to help women who have been diagnosed ... ...
(Date:10/10/2017)... DIEGO, CALIF. (PRWEB) , ... October 10, 2017 , ... ... as part of its corporate rebranding initiative announced today. The bold new look ... its reach, as the company moves into a significant growth period. , It will ...
Breaking Biology Technology:
Cached News: