caa a22 4500 605459088 CHVBK 20210128100232.0 cr unu---uuuuu 210128e20150401xx s 000 0 eng 10.1007/s00167-014-2894-8 doi (NATIONALLICENCE)springer-10.1007/s00167-014-2894-8 Dynamic knee stability and ballistic knee movement after ACL reconstruction: an application on instep soccer kick [Elektronische Daten] [Nuno Cordeiro, Nelson Cortes, Orlando Fernandes, Ana Diniz, Pedro Pezarat-Correia] Purpose: The instep soccer kick is a pre-programmed ballistic movement with a typical agonist-antagonist coordination pattern. The coordination pattern of the kick can provide insight into deficient neuromuscular control. The purpose of this study was to investigate knee kinematics and hamstrings/quadriceps coordination pattern during the knee ballistic extension phase of the instep kick in soccer players after anterior cruciate ligament reconstruction (ACL reconstruction). Methods: Seventeen players from the Portuguese Soccer League participated in this study. Eight ACL-reconstructed athletes (experimental group) and 9 healthy individuals (control group) performed three instep kicks. Knee kinematics (flexion and extension angles at football contact and maximum velocity instants) were calculated during the kicks. Rectus femoris (RF), vastus lateralis, vastus medialis, biceps femoralis, and semitendinosus muscle activations were quantified during the knee extension phase. Results: The ACL-reconstructed group had significantly lower knee extension angle (−1.2±1.6, p<0.021) and increased variability (1.1±1.2, p<0.012) when compared with the control group. Within the EMG variables, the RF had a significantly greater activity in the ACL-reconstructed group than in the control group (79.9±27.7% MVC vs. 49.2±20.8% MVC, respectively, p<0.034). No other statistically significant differences were found. Conclusions: The findings of this study demonstrate that changes in ACL-reconstructed individuals were observed on knee extension angle and RF muscle activation while performing an instep kick. These findings are in accordance with the knee stability recovery process after ACL reconstruction. No differences were observed in the ballistic control movement pattern between normal and ACL-reconstructed subjects. Performing open kinetic chain exercises using ballistic movements can be beneficial when recovering from ACL reconstruction. The exercises should focus on achieving multi-joint coordination and full knee extension (range of motion). Level of evidence: III. Springer-Verlag Berlin Heidelberg, 2014 Movement pattern nationallicence Neuromuscular control nationallicence Open kinetic chain and coordination nationallicence Cordeiro Nuno Interdisciplinary Centre for the Study of Human Performance, Faculty of Human Kinetics, University of Lisbon, Lisbon, Portugal aut Cortes Nelson Sports Medicine Assessment, Research & Testing (SMART) Laboratory, George Mason University, Manassas, VA, USA aut Fernandes Orlando Sport Sciences Department, Technology and Science School, Evora University, Évora, Portugal aut Diniz Ana Interdisciplinary Centre for the Study of Human Performance, Faculty of Human Kinetics, University of Lisbon, Lisbon, Portugal aut Pezarat-Correia Pedro Interdisciplinary Centre for the Study of Human Performance, Faculty of Human Kinetics, University of Lisbon, Lisbon, Portugal aut Knee Surgery, Sports Traumatology, Arthroscopy Springer Berlin Heidelberg 23/4(2015-04-01), 1100-1106 0942-2056 23:4<1100 2015 23 167 https://doi.org/10.1007/s00167-014-2894-8 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00167-014-2894-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Cordeiro Nuno Interdisciplinary Centre for the Study of Human Performance, Faculty of Human Kinetics, University of Lisbon, Lisbon, Portugal aut NATIONALLICENCE 700 1- Cortes Nelson Sports Medicine Assessment, Research & Testing (SMART) Laboratory, George Mason University, Manassas, VA, USA aut NATIONALLICENCE 700 1- Fernandes Orlando Sport Sciences Department, Technology and Science School, Evora University, Évora, Portugal aut NATIONALLICENCE 700 1- Diniz Ana Interdisciplinary Centre for the Study of Human Performance, Faculty of Human Kinetics, University of Lisbon, Lisbon, Portugal aut NATIONALLICENCE 700 1- Pezarat-Correia Pedro Interdisciplinary Centre for the Study of Human Performance, Faculty of Human Kinetics, University of Lisbon, Lisbon, Portugal aut NATIONALLICENCE 773 0- Knee Surgery, Sports Traumatology, Arthroscopy Springer Berlin Heidelberg 23/4(2015-04-01), 1100-1106 0942-2056 23:4<1100 2015 23 167