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@article{Nuccio:2020:10.1111/sms.13748,
author = {Nuccio, S and Del, Vecchio A and Casolo, A and Labanca, L and Rocchi, JE and Felici, F and Macaluso, A and Mariani, PP and Falla, D and Farina, D and Sbriccoli, P},
doi = {10.1111/sms.13748},
journal = {Scandinavian Journal of Medicine and Science in Sports},
pages = {1976--1984},
title = {Muscle fiber conduction velocity in the vastus lateralis and medialis muscles of soccer players after ACL reconstruction},
url = {http://dx.doi.org/10.1111/sms.13748},
volume = {30},
year = {2020}
}

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TY  - JOUR
AB  - The neural factors underlying the persistency of quadriceps weakness after anterior cruciate ligament reconstruction (ACLR) have been only partially explained. This study examined muscle fiber conduction velocity (MFCV) as an indirect parameter of motor unit recruitment strategies in the vastus lateralis (VL) and medialis (VM) muscles of soccer players with ACLR. Highdensity surface electromyography (HDsEMG) was acquired from VL and VM in nine soccer players (22.7 ± 2.9 years; BMI: 22.08 ± 1.72 kg·m−2; 7.7 ± 2.2 months postsurgery). Voluntary muscle force and the relative myoelectrical activity from the reconstructed and contralateral sides were recorded during linearly increasing isometric knee extension contractions up to 70% of maximal voluntary isometric force (MVIF). The relation of MFCV and force was examined by linear regression analysis at the individual subject level. The initial (intercept), peak (MFCV70), and rate of change (slope) of MFCV related to force were compared between limbs and muscles. The MVIF was lower in the reconstructed side than in the contralateral side (−%20.5; P < .05). MFCV intercept was similar among limbs and muscles (P > .05). MFCV70 and MFCV slope were lower in the reconstructed side compared to the contralateral for both VL (−28.5% and −10.1%, respectively; P < .001) and VM (−22.6% and −8.1%, respectively; P < .001). The slope of MFCV was lower in the VL than VM, but only in the reconstructed side (−12.4%; P < .001). These results suggest possible impairments in recruitment strategies of highthreshold motor units (HTMUs) as well as deficits in sarcolemmal excitability, fiber diameter, and discharge rate of knee extensor muscles following ACLR.
AU  - Nuccio,S
AU  - Del,Vecchio A
AU  - Casolo,A
AU  - Labanca,L
AU  - Rocchi,JE
AU  - Felici,F
AU  - Macaluso,A
AU  - Mariani,PP
AU  - Falla,D
AU  - Farina,D
AU  - Sbriccoli,P
DO  - 10.1111/sms.13748
EP  - 1984
PY  - 2020///
SN  - 0905-7188
SP  - 1976
TI  - Muscle fiber conduction velocity in the vastus lateralis and medialis muscles of soccer players after ACL reconstruction
T2  - Scandinavian Journal of Medicine and Science in Sports
UR  - http://dx.doi.org/10.1111/sms.13748
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000542026800001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://onlinelibrary.wiley.com/doi/full/10.1111/sms.13748
VL  - 30
ER  -

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