References of "Croisier, Jean-Louis"
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See detailValidity and reliability of the French translation of the VISA-A questionnaire for Achilles tendinopathy
Kaux, Jean-François ULg; Delvaux, François ULg; Oppong-Kyei, Julian et al

in Disability & Rehabilitation (in press)

Purpose The Victorian Institute of Sport Assessment – Achilles tendinopathy questionnaire (VISA-A) evaluates the clinical severity of Achilles tendinopathy. The aim of this study was to translate the VISA ... [more ▼]

Purpose The Victorian Institute of Sport Assessment – Achilles tendinopathy questionnaire (VISA-A) evaluates the clinical severity of Achilles tendinopathy. The aim of this study was to translate the VISA-A into French and to study the reliability and validity of this French version, the VISA-AF. Method The VISA-A was translated into French to produce the VISA-AF using a validated methodology in six steps. Thereafter, several psychometric properties of this French version such as test–retest reliability, internal consistency, construct validity and floor and ceiling effects were evaluated. Therefore, we recruited 116 subjects, distributed into 3 groups: pathological patients (n¼31), at-risk athletes (n¼63) and healthy people (n¼22). Results The final version of the VISAAF was approved by an expert committee. On a scale ranging from 0 to 100, the average scores of the VISA-AF obtained were 59 (± 18) for the pathological group, 99 (± 1) for the healthy group and 94 (± 7) for the at-risk group. The VISA-AF shows excellent reliability, low correlations with the discriminant subscales of the SF-36 and moderate correlations with the convergent subscales of the SF-36. Conclusions The French version of the VISA-A is equivalent to its original version and is a reliable and valid questionnaire for French-speaking patients with Achilles tendinopathy. [less ▲]

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See detailGait pattern of healthy old people for fast walking condition
GILLAIN, Sophie ULg; Boutaayamou, Mohamed ULg; Schwartz, Cédric ULg et al

in Gerontechnology (2016, September)

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See detailGait pattern of healthy old people for fast walking condition
GILLAIN, Sophie ULg; Boutaayamou, Mohamed ULg; Schwartz, Cédric ULg et al

in Gerontechnology (2016, September)

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See detailGait pattern of healthy old people for fast walking condition
GILLAIN, Sophie ULg; Boutaayamou, Mohamed ULg; Schwartz, Cédric ULg et al

in Gerontechnology (2016, September)

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See detailGait pattern of healthy old people for fast walking condition
GILLAIN, Sophie ULg; Boutaayamou, Mohamed ULg; Schwartz, Cédric ULg et al

in Gerontechnology (2016, September)

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See detailGait pattern of healthy old people for dual task walking condition
GILLAIN, Sophie ULg; Boutaayamou, Mohamed ULg; Schwartz, Cédric ULg et al

in Gerontechnology (2016, September)

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See detailA Comparison of 3D Methods for Identifying the Stance Phase in Treadmill Running for Both Rearfoot and Forefoot Runners
Deflandre, Dorian ULg; Schwartz, Cédric ULg; Weertz et al

in Journal of sports Science (2016), 4

We compared six 3D methods, OptoGait, and Myotest Run for the determination of contact time for runners with different foot strike patterns. Twenty male participants were divided into two groups: the heel ... [more ▼]

We compared six 3D methods, OptoGait, and Myotest Run for the determination of contact time for runners with different foot strike patterns. Twenty male participants were divided into two groups: the heel group, who attack the ground with the heel (n = 12), and the toe group, who attack the ground with the middle/front of the foot (n = 8). They performed trials at speeds of 8 km/h then 16 km/h. To detect foot strike, the use of peak velocity of 3D markers located on the heel, the fifth metatarsal, and the great toe provided the best results for both groups. To detect the toe off, the minimum vertical position of a 3D marker placed in line with the great toe gave the most satisfactory results for both groups. In this way, the values of contact time measured with the 3D methods are consistent. Values measured with OptoGait appear consistent too, while those of the Myotest Run underestimate the contact time for both speeds. 3D analysis provides interesting opportunities for calculation of contact time for both rearfoot and forefoot runners, using specific peak velocities to determine foot strike and marker displacement to determine toe off. [less ▲]

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See detailCross-cultural adaptation and validation of the victorian institute of sport assessment-patella questionnaire for French-speaking patients with patellar tendinopathy
Kaux, Jean-François ULg; Delvaux, François ULg; Oppong-Kyei, Julian et al

in Journal of Orthopaedic & Sports Physical Therapy (2016), 46(5), 384-393

Study Design Clinical measurement study. Background The Victorian Institute of Sports Assessment–Patellar tendinopathy questionnaire (VISA-P), originally developed in English, assesses the severity of ... [more ▼]

Study Design Clinical measurement study. Background The Victorian Institute of Sports Assessment–Patellar tendinopathy questionnaire (VISA-P), originally developed in English, assesses the severity of patellar tendinopathy symptoms. No French version of the questionnaire exists. Objectives The aim of our study was to translate the VISA-P in French and verify its psychometric properties. Methods The translation and cultural adaptation were performed according to international recommendations in six steps: initial translation, translation merging, back translation to the original language, expert committee to reach a pre-final version, test of the pre-final version, and expert committee appraisal of a final version. Afterwards, the psychometric properties the final French version (VISA-PF) were assessed in 92 subjects, divided into three groups: pathological subjects (n = 28), asymptomatic subjects (n = 22) and sports-risk subjects (n = 42). Results All members of the expert committee agreed with the final version. On a scale ranging from 0 to 100 (asymptomatic subject), the average scores of the VISA-PF obtained were 53 (± 17) for the pathological group, 99 (± 2) for the healthy group and 86 (± 14) for the sports-risk group. The test-retest reliability of the VISA-PF was excellent and good internal consistency. Correlations between the VISA-PF and diverging validity of the SF-36 were low and the correlation coefficient values measured between the VISA-PF scores and converged items of the SF-36 were higher. Conclusion The VISA-PF is understandable, valid and suitable for French-speaking patients with patellar tendinopathy. [less ▲]

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See detailMuscular and functional tridimensional analysis after hamstring strain
Paulus, Julien ULg; DELVAUX, François ULg; Schwartz, Cédric ULg et al

in European Journal of Physical and Rehabilitation Medicine (2016, April), 52(2), 263

Introduction The muscle injury, and more especially the hamstring strain, account for a large proportion of explosive top athletes injuries [1-3]. The subsequent down-time period has some sports and ... [more ▼]

Introduction The muscle injury, and more especially the hamstring strain, account for a large proportion of explosive top athletes injuries [1-3]. The subsequent down-time period has some sports and financial negatives consequences for the athlete, his team and/or his club [4, 5]. Despite the rehabilitation before return to play and prevention program, hamstring reinjury rates are still high (26% of all injuries) [6] and it's commonly accepted that a second injury is more severe than a first episode [2]. A more functional test could help the clinician in the return to play process decision to reduce the muscle injuries hamstring relapse. Purpose The aim of our methodology is to analyze, after medical clearance to resume sports activities, for athletes who suffered from grade II/III hamstring muscle strain, the biomechanics of the lower limbs during an explosive jump task. Method After (7,3±0,7 weeks) a grade II or III hamstring muscle tear, eight men (25±5,9 years), without past lower limb major injury, performed: - an isokinetic test (knee maximal flexion-extension in concentric at 60°.s-1 and 240°.s-1 and knee maximal flexion in eccentric at 30°.s-1); - a tridimensional biomechanics analysis of (bipodal and unipodal) squat jump and counter movement jump with Codamotion® system and Kistler® multicomponent force plates. Results A muscular lateral strength imbalance (±10% with p-value < 0,02) has been identified on the hamstring in concentric and eccentric by means of isokinetic testing, with the healthy side stronger than the pathologic. The main statistical significant outcome in the biomechanics analysis is the lower knee angle (±12% with p-value < 0,02) at the low point before the concentric pushing phase of the unipodal CMJ for the healthy leg than to the other one whereas there's no difference between both legs in an equivalent healthy population. Discussion & conclusion The tridimensional analysis appears to be complementary, not redundant, with the isokinetic strength testing due to the different nature of their informations obtained. It could be integrated in the return to play process decision expected the potentially interesting information about the player's biomechanics that it provides. References 1. Ekstrand, J., M. Hagglund, and M. Walden, Epidemiology of muscle injuries in professional football (soccer). Am J Sports Med, 2011. 39(6): p. 1226-32. 2. Ekstrand, J., M. Hagglund, and M. Walden, Injury incidence and injury patterns in professional football: the UEFA injury study. Br J Sports Med, 2011. 45(7): p. 553-8. 3. Lopez, V., Jr., et al., Profile of an American amateur rugby union sevens series. Am J Sports Med, 2012. 40(1): p. 179-84. 4. Price, R.J., et al., The Football Association medical research programme: an audit of injuries in academy youth football. Br J Sports Med, 2004. 38(4): p. 466-71. 5. Verrall, G.M., et al., Assessment of player performance following return to sport after hamstring muscle strain injury. J Sci Med Sport, 2006. 9(1-2): p. 87-90. 6. Brooks, J.H., et al., Incidence, risk, and prevention of hamstring muscle injuries in professional rugby union. Am J Sports Med, 2006. 34(8): p. 1297-306. [less ▲]

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See detailExploring the effect of a second closely-timed infiltration of platelet-rich plasma to treat proximal patellar tendinopathies
Kaux, Jean-François ULg; CROISIER, Jean-Louis ULg; FORTHOMME, Bénédicte ULg et al

in European Journal of Physical and Rehabilitation Medicine (2016, April), 54(Suppl. 1 No. 2), 199

Intorduction: Some clinical series have evaluated the effect of platelet-rich plasma (PRP) in the treatment of jumper’s knee. Although it is possible that a single infiltrative administration may prove to ... [more ▼]

Intorduction: Some clinical series have evaluated the effect of platelet-rich plasma (PRP) in the treatment of jumper’s knee. Although it is possible that a single infiltrative administration may prove to be an effective treatment for this indication, most of the existing studies evaluated the effects of 2 or 3 successive infiltrations. Purpose: The aim of this study was to evaluate whether 2 infiltrations of PRP proves more effective than a single treatment. Methods: Twenty patients suffering from chronic jumper’s knee were enrolled into the study and split into two randomized groups (1 or 2 infiltrations of PRP, respectively). The 3-month follow-up evaluation consisted of VAS, IKDC and VISA-P scores, along with algometer, isokinetic and ultrasounds evaluations. After 1 year, subjects were contacted to define their functional evolution. Results: The concentration of the PRP used for each infiltration was similar in both groups, and contained no red or white cells. Results revealed no difference in treatment efficacy between the groups. Discussion and Conclusion: The comparison between 1 or 2 infiltrations of PRP did not reveal any difference between the 2 groups at short to mid term. A second closely-timed infiltration of PRP to treat jumper’s knees is not necessary to improve the efficacy of this treatment in the short term. A second infiltration should perhaps be envisaged later, but this remains to be demonstrated. [less ▲]

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See detailIs isokinetic exercise dangerous for the heart?
Le Goff, Caroline ULg; Kaux, Jean-François ULg; Cavalier, Etienne ULg et al

in European Journal of Physical and Rehabilitation Medicine (2016, April), 52(suppl. 1 No. 2), 457

INTRODUCTION: Very strenuous exercises can be performed on an isokinetic dynamometer in order to evaluate the resistance to fatigue of different muscular groups. Good cardiac function is necessary in ... [more ▼]

INTRODUCTION: Very strenuous exercises can be performed on an isokinetic dynamometer in order to evaluate the resistance to fatigue of different muscular groups. Good cardiac function is necessary in order to perform these very intensive exercises; otherwise an acute myocardial dysfunction could theoretically appear in predisposed patients. PURPOSE: Our study aimed to observe the cardiovascular impact (by biological point of view) of maximal intense isokinetic eccentric and concentric protocols performed by a population of sedentary young men. METHOD: Resting (T0) and post-exercise (just after (T1), 3 hours (T2) and 24 hours after the exercise (T3)) blood samples were taken in 2 populations of young sedentary men: 12 subjects (22.5±1.15 yo) for the eccentric protocol and 18 subjects (22.4±2.6 yo) for the concentric protocol. These subjects performed an intense maximal isokinetic exercise of the quadriceps muscles involving 30 knee flexions–extensions for each leg. We evaluated markers of cardiovascular risk (highly sensitive troponin T (hs-TnT), N-Terminal Brain natriuretic peptide (NT-proBNP), myoglobin (MYO)), of inflammation (highly sensitive C-reactive protein (hsCRP)), muscle damage (creatine kinase (CK)) and of oxidative stress (myeloperoxidase (MPO), lipidic peroxides (POXL), reduced (GSH) and oxidised glutathione (GSSG)). Haemodynamic parameters were measured continuously using a Portapres, and respiratory parameters were measured using a Sensormedics Vmax 29C. RESULTS: All the physiological parameters measured presented statistically significant changes. For the eccentric exercise, no significant modification in cardiac (NT-proBNP, hs-TNT) and inflammation (hsCRP) biomarkers was observed. However, a significant increase for CK (T3), MYO (T2), MPO (T1), POXL (T1), GSSG (T3) and ratio GSH/GSSG (T2-T3) was shown. For the concentric exercise, the results showed significant increases for the CK (T1-T2-T3), MYO (T1-T2), GSH/GSSG (T1). Evolutionary trends were also observed for the following biomarkers: NT-proBNP (T1-T2-T3), MPO (T2), and GSSG (T4). DISCUSSION and CONCLUSIONS: No modification in cardiac biomarkers was observed after the maximal eccentric isokinetic exercise but some variations can be observed for these biomarkers after the concentric exercise. However, these changes do not exceed the reference values in healthy subjects. We were thus able to prove that the exercise could be performed without any risk to cardiac function in young sedentary subjects. Nevertheless, a significant level of oxidative stress was induced by both exercises. [less ▲]

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See detailPhysical and muscle performances among elderly nursing home residents.
Buckinx, Fanny ULg; Reginster, Jean-Yves ULg; Croisier, Jean-Louis ULg et al

in Osteoporosis International (2016, April), 27(Supplement 1), 217

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See detailTraumatologie du joueur de tennis
Kaux, Jean-François ULg; Schaus, Jean; Delvaux, François ULg et al

in Journal de Traumatologie du Sport (2016), 33(1), 43-47

Tennis is a racquet sport with approximately 10 million licensees and 26 million unaffiliated players in Europe. Tennis injuries represent 21%of those generated by rackets sports. Tennis players are ... [more ▼]

Tennis is a racquet sport with approximately 10 million licensees and 26 million unaffiliated players in Europe. Tennis injuries represent 21%of those generated by rackets sports. Tennis players are subject to traumatic and microtraumatic pathologies. This epidemiological review oftennis-related injuries addresses their type and locations, the cause and time of absence, the demographic and gender differences, as well as theinfluence of technique of play and type of field on their impact. [less ▲]

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See detailUsing platelet-rich plasma to treat jumper’s knees: Exploring the effect of a second closely-timed infiltration
Kaux, Jean-François ULg; Croisier, Jean-Louis ULg; Forthomme, Bénédicte ULg et al

in Journal of Science and Medicine in Sport (2016), 19(3), 200-204

Some clinical series have evaluated the effect of platelet-rich plasma (PRP) in the treatment of proximal patellar tendinopathy. Although it is possible that a single infiltrative administration may prove ... [more ▼]

Some clinical series have evaluated the effect of platelet-rich plasma (PRP) in the treatment of proximal patellar tendinopathy. Although it is possible that a single infiltrative administration may prove to be an effective treatment for this indication, most of the existing studies evaluated the effects of two or three successive infiltrations. The aim of this study was to evaluate whether two infiltrations of PRP proves more effective than a single treatment. DESIGN: Prospective, randomized and comparative study of level 2. METHODS: Twenty patients suffering from chronic proximal patellar tendinopathy were enrolled into the study and split into two randomized groups (one or two infiltrations of PRP, respectively). The 3-month follow-up evaluation consisted of VAS, IKDC and VISA-P scores, along with algometer, isokinetic and ultrasounds evaluations. After 1 year, subjects were contacted to define their functional evolution. RESULTS: The concentration of the PRP used for each infiltration was similar in both groups, and contained no red or white cells. Results revealed no difference in treatment efficacy between the groups. CONCLUSIONS: The comparison between one or two infiltrations of PRP did not reveal any difference between the two groups at short to mid term. A second closely-timed infiltration of PRP to treat proximal patellar tendinopathies is not necessary to improve the efficacy of this treatment in the short term. [less ▲]

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See detailPlatelet-rich plasma (PRP) to treat chronic patellar tendinopathies: comparison of a single versus two closely-timed injections
Kaux, Jean-François ULg; Libertiaux, Vincent ULg; Croisier, Jean-Louis ULg et al

in Muscles, Ligaments and Tendons Journal (2016), 5(4 (eCollection 2015 Oct-Dec)), 297-298

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See detailExtraction of temporal gait parameters using a reduced number of wearable accelerometers
Boutaayamou, Mohamed ULg; Denoël, Vincent ULg; Bruls, Olivier ULg et al

in Proceedings of the 9th International Conference on Bio-inspired Systems and Signal Processing (2016)

Wearable inertial systems often require many sensing units in order to reach an accurate extraction of temporal gait parameters. Reconciling easy and fast handling in daily clinical use and accurate ... [more ▼]

Wearable inertial systems often require many sensing units in order to reach an accurate extraction of temporal gait parameters. Reconciling easy and fast handling in daily clinical use and accurate extraction of a substantial number of relevant gait parameters is a challenge. This paper describes the implementation of a new accelerometer-based method that accurately and precisely detects gait events/parameters from acceleration signals measured from only two accelerometers attached on the heels of the subject’s usual shoes. The first step of the proposed method uses a gait segmentation based on the continuous wavelet transform (CWT) that provides only a rough estimation of motionless periods defining relevant local acceleration signals. The second step uses the CWT and a novel piecewise-linear fitting technique to accurately extract, from these local acceleration signals, gait events, each labelled as heel strike (HS), toe strike (TS), heel-off (HO), toe-off (TO), or heel clearance (HC). A stride-by-stride validation of these extracted gait events was carried out by comparing the results with reference data provided by a kinematic 3D analysis system (used as gold standard) and a video camera. The temporal accuracy ± precision of the gait events were for HS: 7.2 ms ± 22.1 ms, TS: 0.7 ms ± 19.0 ms, HO: ‒3.4 ms ± 27.4 ms, TO: 2.2 ms ± 15.7 ms, and HC: 3.2 ms ± 17.9 ms. In addition, the occurrence times of right/left stance, swing, and stride phases were estimated with a mean error of ‒6 ms ± 15 ms, ‒5 ms ± 17 ms, and ‒6 ms ± 17 ms, respectively. The accuracy and precision achieved by the extraction algorithm for healthy subjects, the simplification of the hardware (through the reduction of the number of accelerometer units required), and the validation results obtained, convince us that the proposed accelerometer-based system could be extended for assessing pathological gait (e.g., for patients with Parkinson’s disease). [less ▲]

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See detailPhysical and muscle performances among elderly nursing home residents. Results fo the senior cohort
Buckinx, Fanny ULg; Reginster, Jean-Yves ULg; CROISIER, Jean-Louis ULg et al

in Journal of Frailty & Aging (2016), 5(Supplement 1), 69

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