Oral salt supplementation and long-distance exercise

in British Journal of Sports Medicine (2011), 45

Fatigue, facteur de risque de lésions musculaires chez le sportif?

in Julia, M.; Perrey, S.; Dupeyron, A. (Eds.) et al Fatigue musculaire (2010)

Effect of the Lengthening of the Protocol on the Reliability of Muscle Fatigue Indicators

in International Journal of Sports Medicine (2010), 31(2), 82-88

The aim of this study was to examine absolute and relative reliability of fatigue measures calculated from peak torque or total work during 20, 30, 40 and 50 reciprocal maximal concentric contractions ... [more ▼]

The aim of this study was to examine absolute and relative reliability of fatigue measures calculated from peak torque or total work during 20, 30, 40 and 50 reciprocal maximal concentric contractions performed on an isokinetic dynamometer at 180 ° · s " 1 . Eighteen moderately active men performed 50 reciprocal maximal concentric contractions on three occasions with one 7 – 10 days recovery between each session. Peak torque and total work were computed for each contraction and subsequently summed to compute cumulated performance after respectively 20, 30, 40 and 50 repetitions. Muscle fatigue was determined after 20, 30, 40 and 50 repetitions by the fatigue index, the percent decrease in performance and the slope. Reliability of average peak torque or average total work was similar and was not a! ected by the lengthening of the protocol, although a learning e! ect was evident for knee flexors. Reliability of fatigue measures calculated from peak torque or total work was similar, improved with the lengthening of the protocol and was better for knee extensors. Measuring average peak torque or average total work and the slope during a protocol involving 30 maximal reciprocal concentric contractions appear to represent a better compromise between reliability and physiological interpretability of the data. [less ▲]

Explosive strength imbalances in professional basketball players.

in Journal of Athletic Training (2009), 44(1), 39-47

CONTEXT: Despite the high rate of lower limb injuries in basketball players, studies of the dominant-limb effect in elite athletes often neglect injury history. OBJECTIVE: To determine lower limb ... [more ▼]

CONTEXT: Despite the high rate of lower limb injuries in basketball players, studies of the dominant-limb effect in elite athletes often neglect injury history. OBJECTIVE: To determine lower limb explosive-strength asymmetries in professional basketball players compared with junior basketball players and control participants. DESIGN: Cohort study. SETTING: Academic medical institution. PATIENTS OR OTHER PARTICIPANTS: 15 professional basketball players, 10 junior basketball players, and 20 healthy men. MAIN OUTCOME MEASURE(S): We performed an isokinetic examination to evaluate the knee extensor (Ext) and flexor (Fl) concentric peak torque at 60 degrees .s(-1) and 240 degrees .s(-1) and (Fl only) eccentric peak torque at 30 degrees .s(-1) and 120 degrees .s(-1). Functional evaluation included countermovement jump, countermovement jump with arms, 10-m sprint, single-leg drop jump, and single-leg, 10-second continuous jumping. Variables were compared among groups using analysis of variance or a generalized linear mixed model for bilateral variables. RESULTS: The 2 groups of basketball players demonstrated better isokinetic and functional performances than the control group did. No differences in functional or relative isokinetic variables were noted between professional and junior basketball players. Professional players with a history of knee injury failed to reach normal knee extensor strength at 60 degrees .s(-1). Knee Ext (60 degrees .s(-1)) and Fl (eccentric 120 degrees .s(-1)) torque values as well as 10-second continuous jumping scores were higher in those professional players without a history of knee injury than those with such a history. Compared with the group without a history of knee injury, the group with a history of knee injury maintained leg asymmetry ratios greater than 10% for almost all isokinetic variables and more than 15% for unilateral functional variables. CONCLUSIONS: The relative isokinetic and functional performances of professional basketball players were similar to those of junior players, with no dominant-side effect. A history of knee injury in the professional athlete, however, was reflected in bilateral isokinetic and functional asymmetries and should be considered in future studies of explosive strength. [less ▲]

Analyse comparative des conséquences physiologiques d’exercices isocinétiques concentriques et excentriques

in Croisier, Jean-Louis; Codine, Philippe (Eds.) Exercice musculaire excentrique (2009)

Quel protocole pour l’évaluation de la résistance à la fatigue du genou ?

in Abstract book de la 6ème Journée Belge d’Isocinétisme du GIBL (2008, March)

Sensibilité d’une épreuve de monitoring fonctionnel de 24 h dans le cadre du suivi du fibromyalgique au cours d’un programme de revalidation aérobie

in Revue du Rhumatisme (2008), 75

Isokinetic fatigue protocol: Assessment of shoulder rotator muscles

in Abstract book of 13th Annual Congress of the European College of Sport Science (2008)

Les vibrations corporelles totales : état de la question

in Brunon-Martinez, A.; Codine, Philippe; Hérisson, C. (Eds.) Coiffe des rotateurs opérée et rééducation (2008)

Whole body vibration (WBV) represents a neuromuscular training method that exposes the body to mechanical vibrations. Popularity of this method in health and fitness centres has grown recently. WBV has ... [more ▼]

Whole body vibration (WBV) represents a neuromuscular training method that exposes the body to mechanical vibrations. Popularity of this method in health and fitness centres has grown recently. WBV has been proposed in sports and more recently in rehabilitation. Mechanical vibrations are modulated by the amplitude and/or the frequency of stimuli. The training intensity depends on the increase of these two parameters. Scientific literature describes the effects of WBV on muscle performance, physiological responses or bone density. Some studies related the feasibility of WBV in pathological conditions. Controversy exists with regard to results of different works. This can be explained by the lack of protocol standardization. WBV seems to be beneficial for the training program of athletes and patients. However, further studies based on the efficiency of WBV are necessary to optimise the protocol training in different topics. [less ▲]

Mise au point d’une épreuve originale de quantification du statut fonctionnel du sujet fibromyalgique

in Revue du Rhumatisme (2008), 75

Objectif Mettre au point une épreuve de "monitoring" du statut fonctionnel du sujet fibromyalgique durant une période de 24 heures. Patients et Méthodes Vingt-six patientes fibromyalgiques, diagnostiquées ... [more ▼]

Objectif Mettre au point une épreuve de "monitoring" du statut fonctionnel du sujet fibromyalgique durant une période de 24 heures. Patients et Méthodes Vingt-six patientes fibromyalgiques, diagnostiquées selon les critères du Collège Américain de Rhumatologie et 21 sujets volontaires contrôles féminins sont inclus dans cette étude. La quantification du statut fonctionnel est réalisée à partir du « Sense Wear Pro® Armband » (basé sur un système d'accélérométrie et de capteurs thermiques) placé au niveau du bras des sujets contrôles et fibromylagiques durant 24 heures. Ce dispositif, particulièrement léger et porté en l'absence de toute gêne particulière, permet, à partir d'un logiciel, de calculer divers paramètres dont la dépense énergétique totale (Kcal), le nombre de pas, le temps en position allongée, le temps de sommeil, la dépense énergétique réalisée à différents niveaux d'intensité d'activité physique (0 à 1 équivalent métabolique (MET), 2 à 3 MET, > à 3 ou 4 MET, … ). Résultats Au terme de cette épreuve originale de monitoring de statut fonctionnel durant 24 heures, nous observons une modification significative du statut fonctionnel de la population fibromyalgique en comparaison de la population contrôle, appariée en termes de paramètres biométriques. La dépense énergétique (Kcal) mesurée à une intensité comprise entre 1 et 2 MET, 3 et 4 MET ou encore à une intensité supérieure à 4 MET apparaît significativement réduite chez les patients fibromyalgiques. Par contre, aucune différence significative ne s'observe pour la dépense énergétique comprise entre 0 et 1 MET, le temps mesuré en position allongée et le temps de sommeil. Enfin, le nombre de pas accomplis sur 24 heures diffère significativement entre les 2 groupes (7776 pas chez les fibromyalgiques versus 11068 pas chez les sujets contrôles). Discussion Ces observations originales illustrent non seulement l'altération du statut fonctionnel du fibromyalgique mais aussi un certain ralentissement fonctionnel puisque aucune différence ne s'observe pour la dépense énergétique mesurée entre 0 et 1 MET alors qu'au-delà, les différences apparaissent significatives. Conclusion Cette étude propose une épreuve particulièrement sensible de monitoring du statut fonctionnel du sujet fibromyalgique. Ce test, ne sollicitant aucune participation volontaire du patient, pourrait constituer une épreuve de choix dans la quantification de statut fonctionnel du fibromyalgique, notamment dans le cadre du suivi longitudinal du patient ou encore la quantification des bénéfices éventuels apportés par diverses thérapeutiques. L'épreuve apparaît, en outre, transférable à de multiples situations pathologiques. [less ▲]