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:11/15/2018)... ... November 14, 2018 , ... uBiome, the leader in ... director of Flatiron Functional Medicine to its Medical Advisory Board. Joining the board ... to uBiome extensive experience in treating the root causes of disease, conscientiously taking ...
(Date:11/14/2018)... ... November 14, 2018 , ... In recognition of World ... raise diabetes awareness and advocacy. The company is reaching out to help educate patients ... as emphasize the importance of vision testing for people with the disease. , The ...
(Date:11/13/2018)... ... November 13, 2018 , ... ... are a class of MS instrumentation with capability to resolve complex sample ... Specifically, those coupled to liquid chromatograph (HRAM LC/MS) have been used extensively ...
Breaking Biology News(10 mins):
(Date:11/13/2018)... ... 13, 2018 , ... , Park Systems, world leader in Atomic Force Microscopes ... demand for AFM technology in China, Park Systems has decided to provide direct support ... Beijing equipped with Park AFM. , The Grand Opening of the Park Beijing Office ...
(Date:11/9/2018)... JACKSONVILLE, Fla. (PRWEB) , ... November 08, 2018 ... ... companies in the United States, adopted a machine-learning powered approach to increasing recovery ... was centered around an Artificially Intelligent Collections (AIC) product developed by NLP Logix, ...
(Date:11/6/2018)... TAHOE, Nev. (PRWEB) , ... November 06, 2018 ... ... their native mobile app for clinical trial data collection and management. TrialKit ... iPhone users with compatible generation devices can quickly and easily sign in to ...
(Date:11/5/2018)... ... 05, 2018 , ... 2Blades has completed a non-exclusive license ... code technology for applications in advancing research in epigenetic technology. , 2Blades ... in 2009, the efficacy of TAL effector-based DNA targeting has been established rapidly ...
Breaking Biology Technology:
Cached News: