PMID: 8581572Oct 1, 1995Paper

Intramuscular pressure and torque during isometric, concentric and eccentric muscular activity

Scandinavian Journal of Medicine & Science in Sports
J R StyfA R Hargens

Abstract

Intramuscular pressures, electromyography (EMG) and torque generation during isometric, concentric and eccentric maximal isokinetic muscle activity were recorded in 10 healthy volunteers. Pressure and EMG activity were continuously and simultaneously measured side by side in the tibialis anterior and soleus muscles. Ankle joint torque and position were monitored continuously by an isokinetic dynamometer during plantar flexion and dorsiflexion of the foot. The increased force generation during eccentric muscular activity, compared with other muscular activity, was not accompanied by higher intramuscular pressure. Thus, this study demonstrated that eccentric muscular activity generated higher torque values for each increment of intramuscular pressure. Intramuscular pressures during antagonistic co-activation were significantly higher in the tibilis anterior muscle (42-46% of maximal agonistic activity) compared with the soleus muscle (12-29% of maximal agonistic activity) and was largely due to active recruitment of muscle fibers. In summary, eccentric muscular activity creates higher torque values with no additional increase of the intramuscular pressure compared with concentric and isometric muscular activity.

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Citations

Sep 14, 1999·Journal of Applied Physiology·H LangbergM Kjaer
Aug 25, 1999·Journal of Orthopaedic Research : Official Publication of the Orthopaedic Research Society·H Sporrong, J Styf
Dec 18, 2001·Journal of Applied Physiology·Tadashi MuramatsuTetsuo Fukunaga
Dec 9, 2003·Journal of Applied Physiology·Gisela SjøgaardKaren Søgaard
Dec 10, 2002·Medicine and Science in Sports and Exercise·Deirdre B BirtlesDi J Newham
Nov 19, 2011·Scandinavian Journal of Medicine & Science in Sports·A Roberts, A Franklyn-Miller
Dec 4, 2003·Medicine and Science in Sports and Exercise·Sharon R Perry-RanaJoel T Cramer
Mar 21, 2018·Proceedings of the National Academy of Sciences of the United States of America·Brent James RaiteriGlen Anthony Lichtwark
May 29, 2018·European Journal of Sport Science·Brent James Raiteri
Feb 9, 2005·European Spine Journal : Official Publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society·M KramerC Willy
Oct 2, 2020·Annals of Biomedical Engineering·Shawn M O'ConnorRichard L Lieber
Jun 11, 1998·Journal of Applied Physiology·R E BallardA R Hargens

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