نتایج جستجو برای: voluntary isometric contraction

تعداد نتایج: 95169  

Journal: :Journal of neurophysiology 2010
Alessander Danna-Dos Santos Brach Poston Mark Jesunathadas Lisa R Bobich Thomas M Hamm Marco Santello

Fingertip force control requires fine coordination of multiple hand muscles within and across the digits. While the modulation of neural drive to hand muscles as a function of force has been extensively studied, much less is known about the effects of fatigue on the coordination of simultaneously active hand muscles. We asked eight subjects to perform a fatiguing contraction by gripping a manip...

2013
Massimiliano Ditroilo Mark Watsford Aron Murphy Giuseppe De Vito

The assessment of musculo-articular stiffness (MAS) with the free-oscillation technique is a popular method with a variety of applications. This study examined the sources of variability (load applied and frequency of oscillation) when MAS is assessed. Over two testing occasions, 14 healthy men (27.7±5.2 yr, 1.82±0.04 m, 79.5±8.4 kg) were measured for isometric maximum voluntary contraction and...

2008

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...

2014
Sridhar P. Arjunan Dinesh K. Kumar Ganesh Naik

The relationship between force of muscle contraction and muscle fatigue with six different features of surface electromyogram (sEMG) was determined by conducting experiments on thirty-five volunteers. The participants performed isometric contractions at 50%, 75%, and 100% of their maximum voluntary contraction (MVC). Six features were considered in this study: normalised spectral index (NSM5), ...

Journal: :Journal of applied physiology 2003
L Rochette S K Hunter N Place R Lepers

Ten young men sustained an isometric contraction of the knee extensor muscles at 20% of the maximum voluntary contraction (MVC) torque on three separate occasions in a seated posture. Subjects performed an isometric knee extension contraction on a fourth occasion in a supine posture. The time to task failure for the seated posture was similar across sessions (291 +/- 84 s; P > 0.05), and the MV...

Journal: :Clinical calcium 1969
Andreas Machner Géza Pap Annett Krohn Kerstin Rohkohl Friedemann Awiszus

In patients with osteoarthritis of the knees, quadriceps muscle dysfunction is an early and common clinical feature and an important determinant of disability. In the current study, changes in quadriceps muscle strength and voluntary quadriceps muscle activation after high tibial osteotomies for primary osteoarthritis of the knee in 19 patients were investigated. Quadriceps muscle function was ...

Journal: :Physical therapy 1988
A Delitto S J Rose J M McKowen R C Lehman J A Thomas R A Shively

Twenty patients who had undergone anterior cruciate ligament reconstructive surgery were placed randomly and independently in an Electrical Stimulation Group (n = 10) or Voluntary Exercise Group (n = 10) to compare the effectiveness of these two muscle-strengthening protocols. Patients in both groups used simultaneous contraction of quadriceps femoris and hamstring muscles during a training reg...

Journal: :Journal of sports sciences 2008
Alberto Rainoldi Marco Gazzoni Roberto Merletti Marco Alessandro Minetto

Twelve endurance athletes and six power athletes performed fatiguing isokinetic knee flexions/extensions. Isokinetic torque was recorded during the exercise. Isometric torque, cortisol and lactate responses, electromyographic (EMG) mean power frequency, average rectified value, and conduction velocity were analysed before and after the isokinetic exercise to determine correlations between elect...

Journal: :Applied sciences 2022

This study examined the effects of cycling training on mechanomyographic median power frequency (MMGMDF)–torque relationships vastus lateralis (VL). Ten males (Age ± SD; 20.20 1.87 years) and 14 females (21.93 5.33 performed isometric trapezoidal muscle actions with knee extensors at 40% maximal voluntary contraction (MVC) before (PRE) following 10 weeks same absolute submaximal torque as pre-t...

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