References of "Croisier, Jean-Louis"
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See detailReproducibility and repeatability of upper limb landmarks palpation for junior operators
Schwartz, Cédric ULg; Fedrigo, Tatiana ULg; Bruls, Olivier ULg et al

Poster (2011, July)

In human motion analysis, bone motions are usually expressed relatively to anatomical reference frames. The anatomical reference frames are constructed thanks to the localization of bony landmarks during ... [more ▼]

In human motion analysis, bone motions are usually expressed relatively to anatomical reference frames. The anatomical reference frames are constructed thanks to the localization of bony landmarks during a static phase prior to the acquisitions. These landmarks are identified by means of palpation. Accurate comparison between subjects and studies implies good reproducibility and repeatability of the palpation process. However, all investigators don’t have a long experience in palpation. In this paper, the reproducibility and repeatability of palpation for junior investigators were measured. Results show worse reproducibility and repeatability than what is usually expected. These errors have particularly an influence on the definition of the reference frames of the arm. This study therefore emphasizes on the need of a specific training of operators working in a motion lab. [less ▲]

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See detailImproving 3D measurements accuracy with camera information redundancy
Schwartz, Cédric ULg; Fringuellini, Anthony ULg; Bruls, Olivier ULg et al

Conference (2011, July)

The accuracy of the Codamotion system for 3D measurement depends mainly on the signal level of the sensors and the resolution of the system at the marker localization. When using several units to cover a ... [more ▼]

The accuracy of the Codamotion system for 3D measurement depends mainly on the signal level of the sensors and the resolution of the system at the marker localization. When using several units to cover a large field of view, the estimated position of the different units might differ. We propose a method taking both resolution and signal level in to account, instead of only the signal level as in the built-in weighting process. This new method offers improved accuracy. [less ▲]

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See detailCurrent opinions on tendinopathy
Kaux, Jean-François ULg; Forthomme, Bénédicte ULg; LE GOFF, Caroline ULg et al

in Journal of Sports Science & Medicine (2011), 10(2), 238-253

Tendinopathy is characterized by pain in the tendon and impaired performance sometimes associated with swelling of the tendon. Its diagnosis is usually clinical but ultrasonography and magnetic resonance ... [more ▼]

Tendinopathy is characterized by pain in the tendon and impaired performance sometimes associated with swelling of the tendon. Its diagnosis is usually clinical but ultrasonography and magnetic resonance imaging can refine the diagnosis. Tendinopathy is highly prevalent and is one of the most frequently self reported musculoskeletal diseases in physical workers and sports people. Nevertheless, it is very difficult to carry out general epidemiologic studies on tendinopathy because of the varying sports cultures and sports habits in different countries. The aetiology of tendinopathy seems to be multi-factorial, involving intrinsic and extrinsic factors. The role of inflammation is still debated but the absence of inflammatory cells does not mean that inflammatory mediators are not implicated. Different theories have been advanced to explain pain and chronicity mechanisms, but these mechanisms remain largely unknown. “Conventional” treatments are generally employed empirically to fight pain and inflammation but they do not modify the histological structure of the tendon. However, these treatments are not completely satisfactory and the recurrence of symptoms is common. Currently, eccentric training remains the treatment of choice for tendinopathy, even though some studies are contradictory. Moreover, many interesting new treatments are now being developed to treat tendinopathy, but there is little evidence to support their use in clinical practice. [less ▲]

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See detailElevation of cardiac and oxidative stress biomarkers after a running activity in sedentary subjects
LE GOFF, Caroline ULg; Bury, Thierry ULg; Rodriguez de la Cruz, Carlos ULg et al

in Clinical Chemistry & Laboratory Medicine (2011, May), 49(Special Suppl), 313

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See detailIsokinetic assessment of the shoulder rotators: A study of optimal test position
Forthomme, Bénédicte ULg; Dvir, Zeevi; Crielaard, Jean-Michel ULg et al

in Clinical Physiology & Functional Imaging (2011), 31(3), 227-232

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See detailInfluence of practice characteristics on injury risk in young athletes
Frisch, Anne; Urhausen, A.; Seil, R. et al

in British Journal of Sports Medicine (2011, April), 45

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See detailPrévention des lésions tendineuses : mythe ou réalité ?
Delvaux, François ULg; Forthomme, Bénédicte ULg; Kaux, Jean-François ULg et al

in Julia, M.; Hirt, D.; Croisier, Jean-Louis (Eds.) et al Tendon et jonction tendino-musculaire - De la biomécanique aux applications thérapeutiques (2011)

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See detailAnalyse critique des traitements conservateurs des tendinopathies
Kaux, Jean-François ULg; Forthomme, Bénédicte ULg; LE GOFF, Caroline ULg et al

in Julia, Marc; Hirt, Daniel; Croisier, Jean-Louis (Eds.) et al Tendon et jonction tendino-musculaire (2011)

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See detailProgramme excentrique et tendinopathie : quels outils, quel programme ?
Forthomme, Bénédicte ULg; KAUX, Jean-François ULg; Crielaard, Jean-Michel ULg et al

in Julia, M.; Hirt, D.; Croisier, Jean-Louis (Eds.) et al Tendon et jonction tendino-musculaire - De la biomécanique aux applications thérapeutiques (2011)

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See detailQuels critères de retour au sport après tendinopathie ?
Croisier, Jean-Louis ULg; Delvaux, François ULg; Kaux, Jean-François ULg et al

in Julia, M.; Hirt, D.; Croisier, Jean-Louis (Eds.) et al Tendon et jonction tendino-musculaire - De la biomécanique aux applications thérapeutiques (2011)

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See detailInfluence sur le tissu tendino(-musculaire) du mode de contraction en entraînement : modèle animal
Kaux, Jean-François ULg; Drion, Pierre ULg; Croisier, Jean-Louis ULg et al

in Julia, Marc; Hirt, Daniel; Croisier, Jean-Louis (Eds.) et al Tendon et jonction tendino-musculaire - De la biomécanique aux applications thérapeutiques (2011)

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See detailEvaluation musculaire isocinétique
Croisier, Jean-Louis ULg

Learning material (2011)

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See detailImproving functional performance and muscle power 4-to-6 months after anterior cruciate ligament reconstruction
Souissi, Sabrine; Wong, Del P.; Dellal, Alexandre et al

in Journal of Sports Science & Medicine (2011), 10

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See detailInfluence of practice characteristics on injury risk in young athletes
Frisch, Anne ULg; Urhausen, Axel; Seil, Romain et al

in British Journal of Sports Medicine (2011), 45

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See detailUsing 3D to understand human motion
Schwartz, Cédric ULg; Forthomme, Bénédicte ULg; Bruls, Olivier ULg et al

Poster (2010, December)

The understanding and tracking of human motion has been a subject of interest in the scientific community for more than one century. The long history of human motion analysis comes from the large scope of ... [more ▼]

The understanding and tracking of human motion has been a subject of interest in the scientific community for more than one century. The long history of human motion analysis comes from the large scope of applications of such measurement that can be found in medicine, biomechanics, sport, ergonomics, and even civil engineering. More recently, those technologies have also been widely exploited for the development of animation movies and games. Needless to say, the techniques used one century ago significantly differ from those used today. This paper describes in a first part the evolution of the technological capabilities for motion analysis and the actual limitations. From this analysis and in a second part, we describe the experience related to the creation of a motion analysis laboratory at the University of Liège and show how such a platform could be the center of a multidisciplinary research and provide valuable information to various communities. [less ▲]

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See detailCritères de retour sur le terrain
Delvaux, François ULg; Rochcongar, P.; Bruyère, Olivier ULg et al

in Abstract book du 7ème Congrès du GIBL (2010, November 27)

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See detailLa réathlétisation du LCA
Rodriguez de la Cruz, Carlos ULg; Lehance, Cédric ULg; Namurois, Guy et al

in Abstract book du 7ème Congrès du GIBL (2010, November 27)

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See detailÉvaluation isocinétique : quel protocole, quels profils ?
Croisier, Jean-Louis ULg; Maquet, Didier ULg; Gremeaux, V. et al

in Abstract book du 7ème Congrès du GIBL (2010, November 27)

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See detailIntrinsic modification of tendon structure after concentric or excentric training
Kaux, Jean-François ULg; Drion, Pierre ULg; Besançon, Benoît et al

Poster (2010, November 25)

Introduction: It is well known that eccentric training is a successful way of treating chronic tendinopathy. Although clinical results are very positive, beneficial morphological and histological effects ... [more ▼]

Introduction: It is well known that eccentric training is a successful way of treating chronic tendinopathy. Although clinical results are very positive, beneficial morphological and histological effects have not yet been elucidated. The aim of our experiment was to determine if there exist any intrinsic modifications in a tendon trained in concentric or eccentric modes, in a rat model, using an original method of measurement (cryo-jaws). Methods: 18 rats were divided into 3 groups: 6 for the control group, without physical restraint; 12 for a training of1 hour, 3 times a week, for 5 weeks, at a speed of 17m/min (1km/h), on a inclined treadmill: 6 rats running uphill at +15° for the concentric effort (group C) and 6 rats running downhill at -15° for the eccentric effort (group E). After this training period, the Achilles, patellar and tricipital tendons of both limbs were surgically removed in all 18 rats. Tendons taken from five rats of each group were subjected to a tensile test up to rupture using a “cryo” jaw. Tendons of the remaining rat of each group were subjected to a histological study. Results: The results showed significant changes in group E only: (1) an increase of the force required to rupture the patellar and tricipital tendons; (2) an improvement of the ratio between the force necessary to rupture the tricipital tendon and the body mass of the rats; (3) an increase of the surface area of the section of the tricipital tendon. No significant change was observed as far as constraint was concerned between groups. Histologically, we saw, in the group E, more peripheral blood vessels and a greater proportion of collagen. Conclusion: This study showed that the mechanical properties of tendon tissue are enhanced by eccentric training. Tendons become stronger, the amount of collagen increases and there is probably more interaction between collagen fibers (mechanotransduction). [less ▲]

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