References of "Croisier, Jean-Louis"
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See detailProposal of a new tDCS safety screening tool TSST (Transcranial direct current stimulation Safety Screening Tool)
Bornheim, Stephen ULiege; Croisier, Jean-Louis ULiege; Maquet, Pierre ULiege et al

in American Journal of Physical Medicine and Rehabilitation (in press)

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See detailIsokinetic strength profile of subjects with proximal patellar tendinopathy
Kaux, Jean-François ULiege; Croisier, Jean-Louis ULiege; Libertiaux, Vincent

in Muscles, Ligaments and Tendons Journal (2019), 9(2), 210-216

Background. Proximal patellar tendinopathy is relatively common among sportsmen. However, the strength profile of subjects with proximal patellar tendinopathies is poorly described. Purpose. We aimed to ... [more ▼]

Background. Proximal patellar tendinopathy is relatively common among sportsmen. However, the strength profile of subjects with proximal patellar tendinopathies is poorly described. Purpose. We aimed to determine the isokinetic strength profile in order to estimate the difference of muscular performance between the healthy and pathological limbs of subjects suffering of this chronic pathology. Study design. cohort study. Methods. 43 subjects with chronic proximal patellar tendinopathy were involved. It has been based on the evaluation of the quadriceps and the hamstrings muscular performance of the healthy and pathological member on isokinetic dynamometer at the speed of 60°/s (C60) and of 240°/s (C240) in concentric mode and at the speed of 30°/s (E30) in eccentric mode. A visual analogic scale of pain (VAS) has been also realized after each isokinetic test. Results. The results of the isokinetic tests comparing the healthy to the pathological limb are meaningful for the different conditions of contraction and test speeds, just like the results of the VAS associated to those tests (p<0,01). Indeed, pathological knees had a maximum peak torque for the quadriceps in C60 lower than healthy. Conclusion. In our study, the isokinetic results show a significant difference in performance isokinetic between the healthy and the pathological limb as well as VAS associated with these tests. However, the diversity of outcomes recorded in the patients suggests us that an individualized treatment is the case of patellar tendon pathology. Finally, it would seem that an isokinetic test in eccentric in some patients is, in addition to a test of provocation of the tendon, a pain assessment tool. [less ▲]

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See detailInfluence of a hamstring eccentric training on strength and flexibility: a randomized controlled trial
Delvaux, François ULiege; Schwartz, Cédric ULiege; Decréquy, Thibault et al

in Football Medicine meets the universe of sport (2019, April)

Introduction Muscle imbalances and poor flexibility are frequently described as risk factors for hamstring injury. Preventive strategies should include eccentric exercises (2, 3), but the influence of ... [more ▼]

Introduction Muscle imbalances and poor flexibility are frequently described as risk factors for hamstring injury. Preventive strategies should include eccentric exercises (2, 3), but the influence of multiple, on-field eccentric exercises on these risk factors remains unclear. The main purpose of this study was to investigate the efficacy of an on-field hamstring eccentric program on strength, passive and active flexibility of hamstring muscles. Methods Twenty-seven male amateur athletes (22.7±1.9 years, 182±9 cm, 75.1±10.4 kg) were randomly assigned to intervention (n = 13) or control group (n = 14). The intervention group was instructed to perform 15 sessions of four progressively increased eccentric exercises (single-leg Roman dead-lift T-drop, slide leg exercise, Askling’s “glider” and Nordic Hansmtring exercise) during a 6-week period. Both groups were assessed as follows: isokinetic (hamstring and quadriceps) strength and hamstrings-to-quadriceps ratios (Cybex Humac Norm® dynamometer (CSMI, Stoughton, USA)), ranges of motion during passive flexibility (straight leg raise - SLR) and active flexibility (Askling’s H test)(1) using an optoelectronic 3D system (Codamotion® CX1 units (Charnwood Dynamics, Rothley, UK)). Results In the intervention group, passive SLR was significantly increased by 11.4° (+12.7%, p<0.001, large effect size), but not active flexibility (+3.1%, p>0.05)(Figure 1). Hamstring eccentric peak torque (+7.1-8%), eccentric body weight normalized peak torque (+7.6-8%) and functional ratios (+8.9-9.3%) were significantly increased (p<0.05, small to medium effect size) in both dominant and non dominant legs of the intervention group participants. No modifications of strength or flexibility were observed in the control group (p>0.05). Conclusions A 6-week eccentric program, including four on-field exercises for hamstring muscles, is an effective method of improving several hamstring injury risk factors such as passive flexibility, eccentric strength and functional ratios. As this program may be easily implemented in a real-world context, an association of multiple eccentric exercises might be useful in an injury prevention strategy, especially in amateur athletes. References (1) Askling CM, Nilsson J, Thorstensson A. A new hamstring test to complement the common clinical examination before return to sport after injury. Knee Surg Sports Traumatol Arthrosc Off J ESSKA. 2010; 18(12):1798–803. (2) Guex KJ, Lugrin V, Borloz S, Millet GP. Influence on Strength and Flexibility of a Swing Phase-Specific Hamstring Eccentric Program in Sprinters’ General Preparation. J Strength Cond Res. 2016; 30(2):525–32. (3) van der Horst N, Smits D-W, Petersen J, Goedhart EA, Backx FJG. The preventive effect of the nordic hamstring exercise on hamstring injuries in amateur soccer players: a randomized controlled trial. Am J Sports Med. 2015; 43(6):1316–23. [less ▲]

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See detailPRESEASON ASSESSMENT OF ANAEROBIC PERFORMANCE IN ELITE SOCCER: ISOKINETIC VERSUS FUNCTIONAL TESTS
Delvaux, François ULiege; Kaux, Jean-François ULiege; Schwartz, Cédric ULiege et al

in XXVIII Isokinetic Medical Group Conference - Football Medicine meets the universe of sport (2019, April)

Introduction Isokinetic and functional jump tests are frequently performed for assessing physical qualities of soccer players during preseason(1, 3). The main purpose of this investigation was to explore ... [more ▼]

Introduction Isokinetic and functional jump tests are frequently performed for assessing physical qualities of soccer players during preseason(1, 3). The main purpose of this investigation was to explore, in a high-level soccer players population, the relationships between isokinetic strength and functional jump performances. Methods Thirty-eight male soccer players from a belgian first division professional soccer club were included (mean age: 24±6 years; height: 183±8 cm; weight: 77±7 kg). The test battery was composed of: an isokinetic knee assessment (Cybex Humac Norm® dynamometer (CSMI, Stoughton, USA)) in concentric (CON) mode (60 and 240°.s-1) for quadriceps and hamstrings, and in eccentric (ECC) mode for the hamstrings only (30°.s-1)(2); one-leg hop tests for distance (single hop (SH), triple hop (TH) and triple crossover hop (TCH)); one-leg vertical jump tests (counter movement jump (CMJ) and drop jump (DJ) on force plates (Kistler®, Kistler Group, Switzerland)). Results No correlations were found between all the isokinetic (absolute or relative performances) and the jump parameters (r<0.40). Players with a low bodyweight normalized (BWN) quadriceps (Q) strength (<2.71N.m.kg-1, first quartile) showed significant reduced jump performances (maximal height of CMJ, absolute and relative peak vertical ground reaction forces of DJ, all hop test performances; p<0.05) compared to the players with high BWN Q strength (>3.14N.m.kg-1, third quartile). Hamstrings-to-quadriceps ratios were not correlated with hop or vertical jump performances (r<0.40). In the past injured group (n=17), greater bilateral differences between uninjured and past injured lower limbs were found with isokinetics (Q CON 60 (mean bilateral difference (MBD): 10.3%; p<0.01), Q CON 240°.s-1 (MBD: 9.9%; p<0.05), H ECC 30°.s-1 (MBD: 16.1%; p<0.001)) than with functional tests (MBD: 2 to 9%; p>0.05) excepted for TCH (MBD: 8%; p=0.01). Concerning the group without past injury, no statistical differences were found between dominant and non dominant sides for all the isokinetic or functional variables (p>0.05). Conclusions According to our results, it might be appropriate to associate vertical jump tests or hop tests with an isokinetic assessment during a preseason soccer players screening. Furthermore, given that bilateral differences between past injured and uninjured limb were mostly highlighted by the isokinetic test than by functional tests, the isokinetic test seems to be an essential tool for preseason assessment. Finally, as a low BWN quadriceps peak torque at 60°.s-1 is related to a weak jump performance, strength and conditioning professionals should take into consideration this parameter in the player’s assessment. References (1) Bogdanis GC, Kalapotharakos VI. Knee Extension Strength and Hamstrings-to-Quadriceps Imbalances in Elite Soccer Players. Int J Sports Med. 2016; 37(2):119–24. (2) Croisier J-L, Ganteaume S, Binet J, Genty M, Ferret J-M. Strength imbalances and prevention of hamstring injury in professional soccer players: a prospective study. Am J Sports Med. 2008; 36(8):1469–75. (3) Menzel H-J, Chagas MH, Szmuchrowski LA, Araujo SRS, de Andrade AGP, de Jesus-Moraleida FR. Analysis of lower limb asymmetries by isokinetic and vertical jump tests in soccer players. J Strength Cond Res. 2013; 27(5):1370–7. [less ▲]

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See detailReprise du sport après tendinopathie traitée par infiltration de PRP
Lehane, Florence ULiege; Delvaux, François ULiege; Croisier, Jean-Louis ULiege et al

in Journal de Traumatologie du Sport (2019), 36(1), 28-33

Platelet rich plasma (PRP), a platelet concentrate obtained by centrifugation of autologous blood, has many properties that promote hemostasis and tissue healing. While its clinical effect is still being ... [more ▼]

Platelet rich plasma (PRP), a platelet concentrate obtained by centrifugation of autologous blood, has many properties that promote hemostasis and tissue healing. While its clinical effect is still being discussed today, PRP is increasingly used in the context of tendinopathies resistant to conventional treatments. In order to resume the practice of sports under optimal conditions, a Decision-Based RTP Model has recently been proposed. We will discuss the different criteria of return to play and risk factors involved in order to optimize the return to play and effectiveness of this treatment with PRP. © 2019 Elsevier Masson SAS [less ▲]

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See detailAdaptive method for detecting zero-velocity regions to quantify stride-to-stride spatial gait parameters using inertial sensors
Boutaayamou, Mohamed ULiege; Schwartz, Cédric ULiege; Joris, Laura ULiege et al

in Proceedings of the 12th International Joint Conference on Biomedical Engineering Systems and Technologies (BIOSTEC 2019) (2019, February 25)

We present a new adaptive method that robustly detects zero-velocity regions to accurately and precisely quantify (1) individual stride lengths (SLs), (2) individual stride velocities (SVs), (3) the ... [more ▼]

We present a new adaptive method that robustly detects zero-velocity regions to accurately and precisely quantify (1) individual stride lengths (SLs), (2) individual stride velocities (SVs), (3) the average of SL, (4) the average of SV, and (5) the cadence during slow, normal, and fast overground walking conditions in young and healthy people. The measurements involved in the estimation of these spatial gait parameters are obtained using only one inertial measurement unit attached on a regular shoe at the level of the heel. This adaptive method reduced the integration drifts across consecutive strides and improved the accuracy and precision in the spatial gait parameter estimation. The validation of the proposed algorithm has been carried out using reference spatial gait parameters obtained from a kinematic reference system. The accuracy ± precision results were for SLs: 0.0 ± 4.7 cm, −0.7 ± 4.4 cm, and −5.8 ± 5.8 cm, during slow, normal, and fast walking conditions, respectively, corresponding to −0.1 ± 4.2 %, −0.5 ± 3.2 %, and −3.3 ± 3.0 % of the respective mean SL. The accuracy ± precision results were for SVs: 0.0 ± 2.9 cm/s, −0.7 ± 3.8 cm/s, and −6.7 ± 6.7 cm/s, during slow, normal, and fast walking conditions, respectively, corresponding to −0.6 ± 3.3 %, −0.1 ± 4.5 %, and −3.5 ± 3.1 % of the respective mean SV. These validation results show a good agreement between the proposed method and the reference, and demonstrate a fairly accurate and precise estimation of these spatial gait parameters. The proposed method paves the way for an objective quantification of spatial gait parameters in routine clinical practice. [less ▲]

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See detailIntérêt des microcourants pour prévenir/limiter la survenue de DOMS après un effort excentrique
Demoulin, Christophe ULiege; Hoyaux, A; Bornheim, Stephen ULiege et al

in Kinesitherapie, La Revue (2019, February), 19(206), 75-76

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See detailLa position trophée au service en tennis
Tubez, François ULiege; Forthomme, Bénédicte ULiege; Croisier, Jean-Louis ULiege et al

Conference (2019, February)

Introduction : Le service est un des coups les plus importants du tennis. De nombreux outils technologiques permettent d'étudier ce geste de façon précise. C'est le cas des systèmes d'analyse ... [more ▼]

Introduction : Le service est un des coups les plus importants du tennis. De nombreux outils technologiques permettent d'étudier ce geste de façon précise. C'est le cas des systèmes d'analyse tridimensionnelle. L'intérêt de ces outils est de faire évoluer les joueurs vers un geste "optimal" pour effectuer le service le plus performant et le moins traumatisant possible. L'objectif de cette étude est d'observer la séquence des actions réalisées autour de la "position trophée" et de déterminer un potentiel meilleur moment pour la décrire. Nous avons également observé l'évolution de cette position au cours du développement du joueur. Matériel, population et méthode : Une analyse cinématique 3D en laboratoire a été réalisée sur 8 joueurs adultes professionnels, 8 joueurs adolescents espoirs et 8 jeunes enfants joueurs nationaux. (Tableau 1) Les tests réalisés dans cette étude sont effectués au Laboratoire d’Analyse du Mouvement Humain de l’Université de Liège. Le laboratoire est aménagé afin de correspondre le plus possible aux dimensions et aux caractéristiques d’un terrain de tennis. Le système Codamotion est un système d’analyse tridimensionnelle qui utilise des marqueurs actifs. Il est constitué de quatre unités CX1 et de 28 marqueurs Nous avons utilisé 28 marqueurs branchés à 7 boitiers (4 marqueurs par boitier). Ceux-ci sont placés selon des repères anatomiques qui respectent les recommandations de l’International Society of Biomechanics (ISB). Résultats : Les instants de flexion maximale des genoux, de position basse du bassin, de flexion du coude à 90° et de position basse du coude semblent être ceux se rapprochant le plus de la position trophée observée chez le joueur élite. (Tableau 2) L'analyse statistique met en évidence des différences significatives entre les groupes lors de cette position trophée. Conclusion ou discussion: La séquence des actions chez les adultes commence par une flexion des membres inférieurs et se poursuit par le placement de la raquette en position haute. Cette séquence est inversée chez les enfants. Le timing des différentes phases du service est différent entre les groupes: une phase de préparation plus longue et une phase d'accélération plus courte sont observées chez les adultes. Il est désormais possible de décrire plus précisément la position trophée et ses caractéristiques, ce qui n'avait jusqu'à présent jamais été fait. Il serait intéressant pour l’entraîneur de réaliser des séances de travail spécifiques pour cette position trophée afin d'améliorer son apprentissage depuis le plus jeunes âge. [less ▲]

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See detailLa tDCS en phase aiguë d’un AVC : un outil rééducatif
Bornheim, Stephen ULiege; Croisier, Jean-Louis ULiege; Elkebir, Kamel Eddine ULiege et al

in Kinesitherapie, La Revue (2019, February), 19(206), 83

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See detailDyskinésie scapulaire et kinésiotape : analyse électromyographique
Tooth, Camille ULiege; Schwartz, Cédric ULiege; Colman, David ULiege et al

in Kinesitherapie, La Revue (2019, February), 206

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See detailEvolution of the trophy position along the tennis serve player’s development
Tubez, François ULiege; Schwartz, Cédric ULiege; Croisier, Jean-Louis ULiege et al

in Sports Biomechanics (2019)

The trophy position is a coaching cue for the tennis serve that usually corresponds to the racquet high point (RHP) during the preparatory action for the stroke. Mastering this position and its time of ... [more ▼]

The trophy position is a coaching cue for the tennis serve that usually corresponds to the racquet high point (RHP) during the preparatory action for the stroke. Mastering this position and its time of occurrence seems essential in overarm movements like in the tennis serve. Clinicians and coaches have a real interest in understanding the trophy position and its evolution during the development of the elite players at different ages. A 3D motion system was used to measure the kinematics of the serve. A group of high-level tennis players were selected for three different age groups: 8 adults (ITN 1), 8 teenagers (ITN 3) and 8 children (ITN 5–6). Results show a modified pattern sequence of the tennis serve between children and adult players. RHP appears earlier relative to impact for children (−0.54 ± 0.10 s) than for adults (−0.36 ± 0.11 s) and teenagers (−0.33 ± 0.05 s) (p = 0.007). At RHP, children present lower trunk transverse plane rotation (p < 0.003) and higher shoulder external rotation (p < 0.003). These positions for the child players may represent an increased risk of shoulder and trunk injury than for older players and contribute to a lower racquet resultant velocity at impact. [less ▲]

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See detailReprise des activités après chirurgie tendineuse : quels critères utiliser ?
COLLIN, Romain ULiege; Croisier, Jean-Louis ULiege; DANIEL, Christophe ULiege et al

in Journal de Traumatologie du Sport (2018), 35(4), 240-255

Objective. – This review aims to identify assessment criteria for return to sport and return to daily activitiesafter surgery of rotator cuff tendon, epicondylar tendon and patellar and Achilles tendons ... [more ▼]

Objective. – This review aims to identify assessment criteria for return to sport and return to daily activitiesafter surgery of rotator cuff tendon, epicondylar tendon and patellar and Achilles tendons.News. – Tendinous surgery is a therapeutic option for chronic tendinopathies reticent to conservativetreatment and tendon ruptures. Return to daily activities and return to sport criteria after tendon surgeryare often not functional and not individualized. Therefore, it is essential to propose, along with othermusculoskeletal lesions, validated recommendations in order to estimate the timeframe for return toactivities.Prospects and projects. – We used clinical criteria such as pain, joint amplitude, isometric and isokineticforce, endurance of leg muscles and jump tests. The results of algofunctional questionnaires adapted to thestudy of the tendon structure, such as Constant score, Patient-Rated Tennis Elbow Evaluation (PRTEE),Victorian Institute of Sport Assessment adapted to the patellar tendon (VISA-P), Achilles tendon TotalRupture Score (ATRS) and Victorian Institute of Sport Assessment adapted to Achilles tendon (VISA-A) arealso part of the criteria listed. In the future, it is necessary to define threshold values of the various scoresand tests proposed in order to be able to better define the time-limit before resumption of activities andto guarantee it in complete safety.Conclusion. – Numerous criteria for return to daily activities et return to sport after tendon surgery arerecorded in the literature. Of these, some seem more relevant to ensure a resumption of activities. Regar-ding the return to play, we recommend to integrate these parameters to the model defined by Creightonet al. [less ▲]

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See detail20 ans d’isocinétisme à l’épaule
Forthomme, Bénédicte ULiege; Kaux, Jean-François ULiege; Croisier, Jean-Louis ULiege

Scientific conference (2018, November)

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See detailDyskinésie scapulaire chez le sportif : faut-il la contrer ?
Forthomme, Bénédicte ULiege; Tooth, Camille ULiege; Schwartz, Cédric ULiege et al

in Journal de Traumatologie du Sport (2018), 35

tThe role played by the scapula in the sporting gestures of arming-throwing or striking a projectile appearsfundamental; it concerns placement and proper scapular mobilization to facilitate the ... [more ▼]

tThe role played by the scapula in the sporting gestures of arming-throwing or striking a projectile appearsfundamental; it concerns placement and proper scapular mobilization to facilitate the functionality of theshoulder. On the other hand, an inappropriate position or mobilization of the scapula during the gesturecould limit the performance or exacerbate an injury. Scapulo-thoracic dysfunction, called dyskinesia, iscommon in the sports shoulder including the upper limb; it is observed in pathological athletes, butalso in asymptomatic sports shoulder. In the presence of a pathology of shoulder, an oriented balanceshould make it possible to identify a possible dyskinesis. The reeducative follow-up then includes a spe-cific management dedicated to the functional causes of this scapulo-thoracic dysfunction. The preventiveapproach is also essential, given the links revealed by prospective studies between the presence of dys-kinesia and the occurrence of lesions. In addition, the benefit of the preventive intervention appears tobe demonstrated during a longitudinal follow-up of athletes integrating a preventive program comparedto a control group. [less ▲]

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See detailPrévention en sport : quels outils ?
Schwartz, Cédric ULiege; Kaux, Jean-François ULiege; Forthomme, Bénédicte ULiege et al

in Journal de Traumatologie du Sport (2018), 35(3), 176-181

Le suivi du risque lésionnel des sportifs implique l’utilisation d’outils validés. Sous le terme d’outils, nous privilégierons la notion de protocole d’évaluation qui englobe des dimensions variées tel ... [more ▼]

Le suivi du risque lésionnel des sportifs implique l’utilisation d’outils validés. Sous le terme d’outils, nous privilégierons la notion de protocole d’évaluation qui englobe des dimensions variées tel que les outils de mesures, les conditions de passation du test, l’expertise des opérateurs … C’est en effet la somme de ces aspects qui déterminera, in fine, la qualité d’un test. Les protocoles d’évaluation impliquent au préalable l’identification de facteurs de risque puis l’évaluation du caractère prédictif de ces facteurs de risque. En outre, le protocole utilisé devra être reproductible entre les sessions pour permettre un suivi longitudinal du sportif mais aussi, si possible, entre les opérateurs et entre les centres d’évaluation. Le développement d’outils de prévention représente donc un travail considérable mais absolument nécessaire pour s’assurer de l’efficacité de la prise en charge des sportifs. [less ▲]

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See detailLa prévention des blessures sportives: modèles théoriques et éléments-clés d'une stratégie efficace
Delvaux, François ULiege; KAUX, Jean-François ULiege; Forthomme, Bénédicte ULiege et al

in Journal de Traumatologie du Sport (2018), 35(3), 152-157

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See detailL’isocinétisme : toujours d’actualité en prévention lésionnelle ?
Croisier, Jean-Louis ULiege; Delvaux, François ULiege; Kaux, Jean-François ULiege et al

in Journal de Traumatologie du Sport (2018), 35

reasonable approach to injury prevention strategies suggests that a single technique, whatever it maybe, will not allow the identification of all risk factors. The complementarity of several tools and ... [more ▼]

reasonable approach to injury prevention strategies suggests that a single technique, whatever it maybe, will not allow the identification of all risk factors. The complementarity of several tools and techniquesseems indispensable. Clinically, many centers perform isokinetic evaluations at the beginning of theseason, as a preventive intervention in high level athletes. Various publications report the usefulnessof isokinetics in primary and secondary prevention for pathologies sometimes specific to a sport. Otherstudies question the use of isokinetics in order to predict the occurrence of a lesion, particularly forhamstrings. In this work, we discuss the possible reasons for discordant results in the literature. [less ▲]

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See detailEccentric training for tendon healing after acute lesion: a rat model
Kaux, Jean-François ULiege; Libertiaux, Vincent; Leprince, Pierre ULiege et al

in Towards healthy tendon ageing... (2018, September)

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