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Neuromuscular fatigability of plantar flexors following continuous and intermittent contractions.
J Appl Physiol (1985)
May 2023
INSERM UMR1093-CAPS, Université de Bourgogne, UFR des Sciences du Sport, Dijon, France.
The purpose of this study is to investigate if a continuous muscle contraction (CON) is more fatiguing than an intermittent exercise (INT) performed until task failure. To get a more comprehensive picture of neuromuscular fatigability, in addition to the commonly used maximal voluntary contraction (MVC), we assessed the maximal torque sustainability (i.e.
View Article and Find Full Text PDFEffects of NMES pulse width and intensity on muscle mechanical output and oxygen extraction in able-bodied and paraplegic individuals.
Eur J Appl Physiol
June 2021
Department of Medicine, University of Udine, Udine, Italy.
Purpose: Neuromuscular Electrical Stimulation (NMES) is commonly used in neuromuscular rehabilitation protocols, and its parameters selection substantially affects the characteristics of muscle activation. Here, we investigated the effects of short pulse width (200 µs) and higher intensity (short-high) NMES or long pulse width (1000 µs) and lower intensity (long-low) NMES on muscle mechanical output and fractional oxygen extraction. Muscle contractions were elicited with 100 Hz stimulation frequency, and the initial torque output was matched by adjusting stimulation intensity.
View Article and Find Full Text PDFEffect of environmental temperature change on the neuromechanical function of the quadriceps muscle.
Eur J Sport Sci
October 2021
Lancaster Medical School, Faculty of Health and Medicine, Lancaster University, Lancaster, UK.
This study compared neuromechanical characteristics of voluntary (maximum voluntary contraction (MVC) peak torque, rate of torque development (RTD), voluntary activation (VA)) and electrically stimulated contractions (peak torque, RTD) when performed under the same temperature conditions. Twelve physically active males performed two isometric MVCs of the quadriceps muscle group in an isokinetic dynamometer. The MVCs were performed after lower limb submersion for 20 min in hot (40°C) or cold (10°C) water.
View Article and Find Full Text PDFUsing the discrete wavelet transform in assessing the effectiveness of rehabilitation in patients after ACL reconstruction.
Acta Bioeng Biomech
January 2018
Józef Piłsudski University of Physical Education, Faculty of Tourism and Health, Department of Medical Rehabilitation, Biała Podlaska, Poland.
Purpose: The purpose of the current study was to assess the effectiveness of rehabilitation in patients after anterior cruciate ligament reconstruction (ACLR) using a wavelet analysis of the torque-time curve patterns of the extensors of the affected knee. The analysis aimed at the quantitative evaluation of irregularities in these torque-time patterns.
Methods: The study involved a group of 22 men who had had ACL reconstruction.
Neuromuscular fatigue following isometric contractions with similar torque time integral.
Int J Sports Med
January 2015
INSERM U1093, Université de Bourgogne, Dijon, France.
Torque time integral (TTI) is the combination of intensity and duration of a contraction. The aim of this study was to compare neuromuscular alterations following different isometric sub-maximal contractions of the knee extensor muscles but with similar TTI. Sixteen participants performed 3 sustained contractions at different intensities (25%, 50%, and 75% of Maximal Voluntary Contraction (MVC) torque) with different durations (68.
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