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
American Physiological Society

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:

(Date:3/9/2019)... and OAKLAND, Calif. (PRWEB) , ... March 07, ... ... allergy, food intolerance, and infectious disease diagnostics and automation – is pleased to ... an online quality control resource giving customers access to lot-specific information, including pattern ...
(Date:3/9/2019)... ... March 08, 2019 , ... Ace Laboratories, Inc. ... resveratrol + ribose hard candy lozenges ( http://www.well-mints.com ). , Well-Mints™ each contain ... hard candy base dusted with powdered sugar. , Well-Mints'™ patented technology delivers resveratrol ...
(Date:2/27/2019)... ALAMEDA, Calif. (PRWEB) , ... February 27, 2019 , ... ... today announced that it has received a National Cancer Institute grant for further development ... of 9 months, with clinical support from the lab of Dr. Omar Mian at ...
Breaking Biology News(10 mins):
(Date:3/5/2019)... ... March 05, 2019 , ... San Fransisko, or Sisko ... purchased him at four years old to pursue a career in dressage. According ... the most talented horse that she’d ever worked with. Unfortunately, Sisko suffered an ...
(Date:2/27/2019)... ... February 27, 2019 , ... Lajollacooks4u is pleased ... San Diego-based team-building and cooking events company will be offering a new cooking ... This fun-filled, interactive team-building event involves pairing two popular items together – tacos ...
(Date:2/22/2019)... ... February 20, 2019 , ... ... an emerging leader in the rapidly growing NGS (Next Generation Sequencing) field, have ... Genomics laboratory and incubator. , "As an innovation center and idea incubator, we ...
(Date:2/19/2019)... (PRWEB) , ... February 19, 2019 , ... VetStem ... regulatory and manufacturing experience. In October 2018, VetStem authorized the formation of Personalized ... to PSC its stem cell patents, data, and FDA filings to launch into human ...
Breaking Biology Technology:
Cached News: