The aim of this study was to investigate the difference in the magnitude of muscle damage between maximal eccentric exercises of the elbow flexors (EF) and knee extensors (KE). Twelve sedentary male volunteers participated in the study. Range of motion (ROM), isometric peak torque (IPT), delayed onset of muscle soreness (DOMS), creatine kinase activity (CK), and myoglobin concentration (Mb) wer...

of Thesis entitled Musculotendon Modeling of the Elbow Joint for Unimpaired Subjects and Persons after Stroke using Noninvasive and In Vivo Information submitted by Li Le for the Degree of Doctor of Philosophy at The Hong Kong Polytechnic University in March 2007 Neuromusculoskeletal modeling provides insights into the muscular system which are not always obtained through experiment or observat...

Our previous study has shown that supersonic shear imaging (SSI) can be accurately used to estimate muscle activity level. The present study was designed to assess the muscle activity level of the main elbow flexors using this technique during linear torque ramps of 30 s from 0 to 40% of the previously determined maximal voluntary contraction (MVC). The echographic probe was randomly placed on ...

OBJECTIVES to establish the reliability of the modified Ashworth scale for measuring muscle tone in a range of muscle groups (elbow, wrist, knee and ankle; flexors and extensors) and of the Medical Research Council scale for measuring muscle power in the same muscle groups and their direct antagonists. DESIGN a cross-sectional study involving repeated measures by two raters. We estimated reli...

The flavonoid quercetin is purported to have potent antioxidant and anti-inflammatory properties. This study examined if quercetin supplementation attenuates indicators of exercise-induced muscle damage in a double-blind laboratory study. Thirty healthy subjects were randomized to quercetin (QU) or placebo (PL) supplementation and performed 2 separate sessions of 24 eccentric contractions of th...

In order to characterize the physiological adjustments within the neuromuscular system that contribute to task failure, this study examined the surface mechanomyographic (MMG) response during maximal and submaximal isometric force tasks of the elbow flexors sustained to failure. The time and frequency components of the MMG signal have shown to be influenced by motor unit activation patterns as ...

The present study aimed to investigate the validity of estimating muscle volume by bioelectrical impedance analysis. Bioelectrical impedance and series cross-sectional images of the forearm, upper arm, lower leg, and thigh on the right side were determined in 22 healthy young adult men using a specially designed bioelectrical impedance acquisition system and magnetic resonance imaging (MRI) met...

This study compared the mechanisms that limit the time to failure of a sustained submaximal contraction at 20% of maximum when the elbow flexors either supported an inertial load (position task) or exerted an equivalent constant torque against a rigid restraint (force task). The surface electromyogram (EMG), the motor-evoked potential (MEP) in response to transcranial magnetic stimulation (TMS)...