caa a22 4500 467941599 CHVBK 20180406153014.0 cr unu---uuuuu 170328e20060501xx s 000 0 eng 10.1007/s00421-006-0134-8 doi (NATIONALLICENCE)springer-10.1007/s00421-006-0134-8 Torque and surface mechanomyogram parallel reduction during fatiguing stimulation in human muscles [Elektronische Daten] [Massimiliano Gobbo, Emiliano Cè, Bertrand Diemont, Fabio Esposito, Claudio Orizio] The purpose of the study was to verify, by means of torque and mechanomyogram (MMG) compared analysis, the validity of MMG as a tool to investigate the contractile changes due to localized muscular fatigue induced by stimulation protocols usually employed for sport training and rehabilitation programs. Ten healthy sedentary subjects participated in the study. Torque produced by the dominant biceps brachii (BB) and vastus lateralis (VL) during transcutaneous stimulated contractions has been recorded by a load cell strapped to the subjects' wrist and distal one-third of the tibia, respectively. MMG was detected over the muscle bellies during a monopolar supramaximal stimulation of the main motor point. After potentiation, the fatiguing stimulation was administered. It consisted of 50 cycles, with 2s of 50Hz and 25s of 2Hz. Averaged normalized values of peak torque (pT) and MMG peak-to-peak (MMG-pp) of the subjects group decreased from their initial 100% values to 55% (pT) and 60% (MMG-pp) for BB and to 43% (pT) and 47% (MMG-pp) for VL. The pT% and MMG-pp% changes throughout the stimulation protocol presented high correlation (BB: R=0.95, P<0.001; VL: R=0.94, P<0.001). This correlation suggests that MMG could be used to follow muscle mechanical fatigue development when torque output is not or hardly detectable such as during electrical stimulation programs employed for sport training or rehabilitation protocols. Springer-Verlag, 2006 Electrical stimulation nationallicence Mechanomyography nationallicence Muscle fatigue nationallicence Skeletal muscle nationallicence Gobbo Massimiliano Dipartimento di Scienze Biomediche e Biotecnologie, Università degli Studi di Brescia, Viale Europa, 11, 25123, Brescia, Italy aut Cè Emiliano IEFSAS, Istituto Esercizio Fisico, Salute e Attività Sportiva, Facoltà di Scienze Motorie, Università degli Studi di Milano, Milan, Italy aut Diemont Bertrand Dipartimento di Scienze Biomediche e Biotecnologie, Università degli Studi di Brescia, Viale Europa, 11, 25123, Brescia, Italy aut Esposito Fabio IEFSAS, Istituto Esercizio Fisico, Salute e Attività Sportiva, Facoltà di Scienze Motorie, Università degli Studi di Milano, Milan, Italy aut Orizio Claudio Dipartimento di Scienze Biomediche e Biotecnologie, Università degli Studi di Brescia, Viale Europa, 11, 25123, Brescia, Italy aut European Journal of Applied Physiology Springer-Verlag 97/1(2006-05-01), 9-15 1439-6319 97:1<9 2006 97 421 https://doi.org/10.1007/s00421-006-0134-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00421-006-0134-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Gobbo Massimiliano Dipartimento di Scienze Biomediche e Biotecnologie, Università degli Studi di Brescia, Viale Europa, 11, 25123, Brescia, Italy aut NATIONALLICENCE 700 1- Cè Emiliano IEFSAS, Istituto Esercizio Fisico, Salute e Attività Sportiva, Facoltà di Scienze Motorie, Università degli Studi di Milano, Milan, Italy aut NATIONALLICENCE 700 1- Diemont Bertrand Dipartimento di Scienze Biomediche e Biotecnologie, Università degli Studi di Brescia, Viale Europa, 11, 25123, Brescia, Italy aut NATIONALLICENCE 700 1- Esposito Fabio IEFSAS, Istituto Esercizio Fisico, Salute e Attività Sportiva, Facoltà di Scienze Motorie, Università degli Studi di Milano, Milan, Italy aut NATIONALLICENCE 700 1- Orizio Claudio Dipartimento di Scienze Biomediche e Biotecnologie, Università degli Studi di Brescia, Viale Europa, 11, 25123, Brescia, Italy aut NATIONALLICENCE 773 0- European Journal of Applied Physiology Springer-Verlag 97/1(2006-05-01), 9-15 1439-6319 97:1<9 2006 97 421 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer