Publications of Jean-Louis Croisier
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See detailTight shoulders: a clinical, kinematic and strength comparison of symptomatic and asymptomatic male overhead athletes before and after stretching
Schwartz, Cédric ULiege; Croisier, Jean-Louis ULiege; Bruls, Olivier ULiege et al

in European Journal of Sport Science (in press)

A tightness of the posterior structures of the throwing shoulder has been hypothesized to be associated with injuries and pain because of alterations of the scapular kinematics and muscular imbalances ... [more ▼]

A tightness of the posterior structures of the throwing shoulder has been hypothesized to be associated with injuries and pain because of alterations of the scapular kinematics and muscular imbalances. The aims of this study were to identify the clinical and biomechanical profile of symptomatic and asymptomatic overhead athletes with a tight shoulder and to evaluate the efficiency of a self-applied stretching program. Twenty male overhead athletes were recruited. Half of them reported a painful shoulder at the beginning of the study. For four weeks, the volunteers performed daily stretching exercises. Before and after the stretching program, gleno-humeral mobility, scapular kinematics, rotator muscles strength and pain were evaluated. Before stretching, the main difference between the groups was more impingement syndrome and rotator cuff tendon lesion positive tests in the symptomatic group (p<0.027, effect size = 0.51). After the program, pain reported by the symptomatic volunteers was reduced by approximately 40% and the gleno-humeral internal rotation bilateral difference was significantly reduced by 77.6% (p<0.009, effect size = 0.84). In the symptomatic group, the scapula at rest was significantly more posteriorly tilted (p=0.027, effect size = 0.69) after the stretching; a position that has been shown to limit the risk of impingement. The absence of significant differences of the profiles of the symptomatic and asymptomatic overhead athletes before stretching may indicate that the initiation of early prevention programs, including self-applied stretching, should not rely solely on biomechanical and clinical parameters and might be recommended to all players with a tight shoulder. [less ▲]

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See detailDevelopment of a new fatigability jumping protocol : Effect of the test duration on reproducibility and performance
Paulus, Julien ULiege; Croisier, Jean-Louis ULiege; Kaux, Jean-François ULiege et al

in Science et Sports (in press)

The Wingate Anaerobic Test (WAnT) and isokinetic fatigability protocols are mainly used to evaluate the anaerobic power of athletes for whom jumping is a predominant action in their sport. Nevertheless ... [more ▼]

The Wingate Anaerobic Test (WAnT) and isokinetic fatigability protocols are mainly used to evaluate the anaerobic power of athletes for whom jumping is a predominant action in their sport. Nevertheless, the testing protocol must be as close as possible to the activity pattern of the sport to be valid. Therefore, for these athletes, the test should consist of repetitions of jumps that are task-specific. Our aim was to propose a new jumping protocol allowing for specific assessment of fatigue, to examine its absolute and relative reliability and to determine its ideal duration. Twenty male volleyball performed fifty countermovement jumps (CMJ) at a rate of 33 jumps per minute on two occasions, with seven days recovery between each session. Jump height was computed for each CMJ using a 3D optoelectronic system, which was subsequently added to determine cumulative performance after 10, 15, 20, 25, 30, 35, 40, 45 and 50 repetitions. Reliability of the average jump height was not affected by the lengthening of the protocol and was high for all considered durations (ICC > 0.94; SEM < 5%). A decrease in performance was directly and proportionally related to the duration of the fatigability protocol. Measuring average jump height during a protocol involving 25 CMJ at the rate of 33 jumps per minute appears to represent the best compromise between reliability, induced fatigue and physiological considerations. Moreover, until 25 repetitions, the partial sums by five repetitions can and should be used to further explore the subject's performance during the test. [less ▲]

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See detailL’union fait la force ! Le réseau francophone ReFORM est reconnu par le CIO pour faire avancer la prévention des blessures et la protection de la santé des athlètes
Edouard, Pascal; Bieuzen, François; Cabri, Jan et al

in Journal de Traumatologie du Sport (in press)

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See detailInfluence of scapular dyskinesis, kinesiotaping and fatigue on tennis serve performance
Tooth, Camille ULiege; Schwartz, Cédric ULiege; Fransolet, Charlotte ULiege et al

in International Journal of Performance Analysis in Sport (2020)

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See detailInnovations en médecine physique et réadaptation
BETHLEN, Sarah ULiege; Bornheim, Stephen ULiege; Delvaux, François ULiege et al

in Revue Médicale de Liège (2020), 75(5-6), 445-451

Over the last decade, Physical and Rehabilitation Medicine (PRM) is a medical specialty that has evolved considerably in the various fields that concern it : from the management of low back pain and ... [more ▼]

Over the last decade, Physical and Rehabilitation Medicine (PRM) is a medical specialty that has evolved considerably in the various fields that concern it : from the management of low back pain and lumbosciatalgia or osteoporosis in a multidisciplinary manner, through the use of new technologies in neuro-locomotor rehabilitation and robotisation in amputee patients for example, the development of regenerative medicine and prevention in sports traumatology and, finally, the progress of electrophysiology techniques for the diagnosis of small-fibre neuropathies. These various advances will be discussed in this article. [less ▲]

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See detailtDCS in acute neglect patients
Bornheim, Stephen ULiege; Croisier, Jean-Louis ULiege; Kaux, Jean-François ULiege

Conference (2020, April 21)

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See detailActivation Profile of Scapular Stabilizing Muscles in Asymptomatic People. Does Scapular Dyskinesis Have an Impact on Its?
Tooth, Camille ULiege; Schwartz, Cédric ULiege; Croisier, Jean-Louis ULiege et al

in American Journal of Physical Medicine and Rehabilitation (2020)

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See detailInfluence of a field hamstring eccentric training on muscle strength and flexibility
Delvaux, François ULiege; Schwartz, Cédric ULiege; Decréquy, Thibalut et al

in International Journal of Sports Medicine (2020), 41(4), 233-241

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See detailKinesiotaping for scapular dyskinesis: The influence on scapular kinematics and on the activity of scapular stabilizing muscles
Tooth, Camille ULiege; Schwartz, Cédric ULiege; Colman, David ULiege et al

in Journal of Electromyography and Kinesiology (2020), 51

Scapular dyskinesis is observed in 61% of overhead athletes (Burn et al., 2016). For most of them, it remains asymptomatic. However, scapular dyskinesis is considered a risk factor for shoulder injury by ... [more ▼]

Scapular dyskinesis is observed in 61% of overhead athletes (Burn et al., 2016). For most of them, it remains asymptomatic. However, scapular dyskinesis is considered a risk factor for shoulder injury by some authors (Clarsen et al., 2014). The aim of this study is to explore the effectiveness of kinesiotaping in modifying scapular kinematics and peri-scapular muscle activity in dyskinetic athletes. The 3-dimensional position and orientation of the scapula as well as the activation of upper trapezius, lower trapezius and serratus anterior were recorded in twenty asymptomatic athletes during shoulder movements (flexion and abduction), in loaded and unloaded conditions and in three circumstances (standard, kinesiotaping 1, kinesiotaping 2). A significant decrease between 9 and 12% in upper trapezius activity was observed with kinesiotaping 1 and 2. Lower trapezius activity was slightly increased with kinesiotaping 1 while it was significantly decreased about 15–20% with kinesiotaping 2. No change was observed in serratus anterior activity, for either kinesiotaping 1 or 2. Considering scapular kinematics, both kinesiotaping 1 and 2 significantly increased posterior tilt and upward rotation. External rotation was decreased with kinesiotaping 2, in comparison to standard condition. Kinesiotaping, and especially taping 1, seems to be an effective method for changing periscapular muscle activity and scapular kinematics. [less ▲]

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See detailTranscranial direct current stimulation associated with physical-therapy in acute stroke patients - A randomized, triple blind, sham-controlled study
Bornheim, Stephen ULiege; Croisier, Jean-Louis ULiege; MAQUET, Pierre ULiege et al

in Brain Stimulation (2020), 13(2), 329-336

Background: Transcranial Direct Current Stimulation has been increasing in popularity in the last few years. Despite vast amounts of articles on the use of tDCS on stroke patients, very little has been ... [more ▼]

Background: Transcranial Direct Current Stimulation has been increasing in popularity in the last few years. Despite vast amounts of articles on the use of tDCS on stroke patients, very little has been done during the acute phase. Objectives: Measure the effects of tDCS on functional and sensory outcomes throughout the first year post onset of stroke. Methods: 50 acute stroke patients were randomized and placed into either the treatment or sham group. Anodal tDCS was applied (2 mA, 20min) 5 times a week during the first month post stroke. Patients were evaluated with the Wolf Motor Function Test, the Semmes Weinstein Monofilament Test, the Upper Extremity section (UEFM), the Lower Extremity section (LEFM) and the Somatosensory section of the Fugl Meyer Test, the Tardieu Spasticity Scale, the Stroke Impact Scale (SIS), the Hospital Anxiety and Depression Scale (HADS) and the Barthel Index. Evaluations were held at 48 h post stroke, week 1, 2, 3, 4, 3 months, 6 months and 1 year. Results: There were statistically and clinically significant improvements after tDCS in all functional motor outcomes, and somatosensory functions. Differences between both groups for the main outcome (WMFT time) were 51% (p=0.04) at one month, and 57% (p=0.02) at one year. Conclusion: tDCS seems to be an effective adjuvant to conventional rehabilitation techniques. If applied in the acute stages of stroke, functional recovery is not only accelerated, but improved, and results are maintained up to one-year post stroke. [less ▲]

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See detailRééducation et tendinopathies : place de l’isocinétisme
Croisier, Jean-Louis ULiege; Kaux, Jean-François ULiege

Conference (2020, February 01)

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See detailA foot/ground contact model for biomechanical inverse dynamics analysis
Van Hulle, Romain ULiege; Schwartz, Cédric ULiege; Denoël, Vincent ULiege et al

in Journal of Biomechanics (2020), 100

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See detailLe réseau francophone ReFORM
Edouard, Pascal; Bieuzen, François; Cabri, J et al

in Science et Sports (2020), 35(1), 61-62

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See detailEvaluation of ankle proprioception by destabilization device
Aguilaniu, Aude ULiege; Hallais, Etienne; Amand, Laurie et al

Conference (2020, January 08)

Introduction: After a first lateral ankle sprain, ankle proprioception may often be altered and contribute to a high risk of re-injury. The joint position reproduction (JPR) test enable to evaluate a ... [more ▼]

Introduction: After a first lateral ankle sprain, ankle proprioception may often be altered and contribute to a high risk of re-injury. The joint position reproduction (JPR) test enable to evaluate a joint proprioception. Isokinetic dynamometer is a reliable tool to assess the JPR ability. However, this tool is expensive and not always adapted to assessment on field. This study aimed to establish the reliability of ipsilateral JPR as used in clinical practice with a commercialized destabilization device (Myolux®). Material & Methods: fifteen recreationally-active young adults (30 ankles) were assessed by the same clinician twice, six to eight days apart. Measurements were performed with subjects in a sitting position. The participants were wearing the Myolux®. This device allowed a movement from 5° of eversion to 30° of inversion. After familiarization, the test consisted of ten repetitions of ipsilateral JPR imposed randomly by the connected tablet. The subjects started with a score of 100%. They lost 5% when they made a mistake between 2° to 4°; they lost 10% when they made a mistake higher than 4°. Test-retest intra-class correlation coefficients (ICC) and minimal detectable change (MDC) were calculated to determine the reliability of the device. Results: ICC was equal to 0.12 [-0.40;0.58] with MDC equal to 33% on the dominant leg and ICC was equal to 0.0 [-0.50;0.50] with MDC equal to 52% on the non-dominant leg. Conclusion: Up to now, Myolux® is not developed enough to be used as an ankle proprioception (JPR) evaluation tool in clinical practice. [less ▲]

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See detailAlgorithm for extracting initial and terminal contact timings during treadmill running using inertial sensors
Prijot, Laura ULiege; Schwartz, Cédric ULiege; Watrin, Julien et al

Conference (2020)

Inertial measurement units (IMUs) are now considered as an economical solution for long term assessment in real conditions. However, their use in running gait analysis is relatively new and limited ... [more ▼]

Inertial measurement units (IMUs) are now considered as an economical solution for long term assessment in real conditions. However, their use in running gait analysis is relatively new and limited. Detecting the timing at which the foot strikes the ground (initial contact, IC) and the timing at which the foot leaves the ground (terminal contact, TC) gives access to many relevant temporal parameters such as stance, swing or stride durations. In this paper, we present an original algorithm to extract IC and TC timings and associated parameters from running data. These data have been measured using a newly developed IMU-based hardware system in ten asymptotic participants who ran at three speeds (slow, normal, and fast) with different running patterns (natural, rearfoot strike, mid-foot strike, and forefoot strike). This algorithm has been validated against a 200 Hz video camera based on 7056 IC and TC timings and 6861 temporal parameters. This algorithm extracted ICs and TCs with an accuracy and precision of (median [1st quartile; 3rd quartile]) 5 ms [-5 ms, 15 ms] and 0 ms [-5 ms, 5 ms], respectively. The relative errors in the extraction of stride and stance durations are -1.56 ± 3.00% and 0.00 ± 1.32%, respectively. [less ▲]

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See detailDans notre job d'entraîneur, que faisons-nous actuellement pour éviter les blessures?
Delvaux, François ULiege; Croisier, Jean-Louis ULiege

Conference given outside the academic context (2019)

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