The influence of different floor stiffness on mechanical efficiency of leg extensor muscle

Ergonomics
C BoscoA Viru

Abstract

The mechanical behaviour of skeletal muscle is influenced by internal factors (e.g. re-use of elastic energy) and/or external conditions (e.g. floor compliance, shoe structure etc.). These factors have an effect on muscular work economy-this was investigated in the present study. Eight subjects were tested during three different series of jumps. Each series consisted of rhythmical vertical jumps performed at desired frequency and height for 1 min. The first (1) series was executed on the laboratory floor without rebound condition (subjects were asked to maintain 1 s period in an isometric condition before concentric work was performed), the second (II) and the third (III) series were performed in rebound conditions respectively on a laboratory floor (hard surface) and on a special panel possessing high compliance (a special foam rubber panel with stiffness of 14.4 kN/m). Expired air was collected during the test and recovery for determination of energy expenditure. Mechanical work was calculated from the vertical displacement of the body during the jumps. The results indicated that the net efficiency in the jumps without prestretch of the leg extensor muscles (series I) was the lowest (19.4%). In contrast, the net efficiency ob...Continue Reading

References

Jan 1, 1979·Journal of Biomechanics·T A McMahon, P R Greene
Jun 1, 1975·Journal of Applied Physiology·G A Gaesser, G A Brooks
Jan 1, 1975·Pflügers Archiv : European journal of physiology·H ThysR Margaria
Nov 1, 1987·Acta Physiologica Scandinavica·C BoscoM La Rosa
Dec 1, 1974·Acta Physiologica Scandinavica·E Asmussen, F Bonde-Petersen
Jul 1, 1974·Acta Physiologica Scandinavica·E Asmussen, F Bonde-Petersen
Apr 1, 1972·Journal of Applied Physiology·H ThysR Margaria
Sep 1, 1970·Journal of Applied Physiology·G A Cavagna
Jan 1, 1968·Journal of Applied Physiology·G A CavagnaR Margaria
May 28, 1968·Internationale Zeitschrift für angewandte Physiologie, einschliesslich Arbeitsphysiologie·R Margaria
Jan 1, 1983·European Journal of Applied Physiology and Occupational Physiology·C BoscoP V Komi
Feb 1, 1981·Acta Physiologica Scandinavica·C BoscoA Ito
Jan 1, 1995·European Journal of Applied Physiology and Occupational Physiology·H Kyröläinen, P V Komi
Jan 1, 1953·Acta Physiologica Scandinavica·E ASMUSSEN
Jan 1, 1965·Journal of Applied Physiology·G A CAVAGNAR MARGARIA

❮ Previous
Next ❯

Citations

Jan 18, 2006·European Journal of Applied Physiology·Yves HenchozAlain Belli
May 29, 2007·European Journal of Applied Physiology·Grant O McCaulleyJeffrey M McBride
Feb 2, 2012·European Journal of Applied Physiology·Jeffrey M McBride, James G Snyder
Sep 28, 2013·European Journal of Applied Physiology·Olaf PrieskeUrs Granacher
Dec 13, 2005·Ergonomics·Antonio TessitoreLaura Capranica
Sep 14, 2007·Journal of Sports Sciences·Sawas Stafilidis, Adamantios Arampatzis
Apr 13, 2004·Medicine and Science in Sports and Exercise·Adamantios ArampatzisGert-peter Brüggemann
Jul 20, 2006·Gerontology·Antonio TessitoreLaura Capranica
Jul 5, 2005·Clinical Biomechanics·Paul FiolkowskiBlaise Williams
Mar 23, 2013·Gait & Posture·Neeta KanekarAlexander S Aruin
Oct 17, 2017·International Journal of Sports Physiology and Performance·Johan CassirameJean-Benoit Morin

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.

Related Papers

Journal of Strength and Conditioning Research
John A MercerChris M Ross
Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology
Merja HoffrénP V Komi
Scandinavian Journal of Medicine & Science in Sports
M BucheckerE Müller
European Journal of Applied Physiology
H KyröläinenP V Komi
© 2021 Meta ULC. All rights reserved