References of "Jidovtseff, Boris"
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See detailDas MOBAK-Netzwerk: Kulturvergleichende Perspektive aus acht europäischen Ländern
Scheuer, Claude; Cloes, Marc ULg; Colella, Dario et al

in Kaboth, Holger; Heim, Christopher; Prohl, Robert (Eds.) Bildungsforschung im Sport (2016, May 27)

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See detailL’ACCOUTUMANCE À L’EAU, UN PASSAGE OBLIGÉ AVANT LA NATATION ?
Mornard, Manhattan ULg; Delvaux, Anne ULg; Delsupexhe, Nadège et al

Poster (2016, February 27)

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See detailSPÉCIALISATION SPORTIVE PRÉCOCE : QUEL IMPACT SUR LA PERFORMANCE, SUR LE DÉVELOPPEMENT ET SUR LA SANTÉ ET QUELLES PISTES DE SOLUTION ?
Jidovtseff, Boris ULg

in Jidovtseff; Halleux, Philippe; Lambert, Eric (Eds.) Livre des résumés du 2ème colloque Guuy Namurois (de l'éducation physique à la performance sportive) (2016, February 27)

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See detailIntérêt d’un modèle de compétition adapté aux enfants en athlétisme : le Kid’s Athletics
Jidovtseff, Boris ULg; Wuillaume, Sandrine; Cloes, Marc ULg

Poster (2016, February 27)

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See detailInfluence of regular soccer or swimming practice on gross motor development in childhood
Rocha, Helena; Marinho, Daniel; Jidovtseff, Boris ULg et al

in Journal Motricidade (2016), 12(4), 33-43

The objective of this study was to analyse the changes on gross motor development after five (T5), ten (T10) and 30 (T30) months of swimming or soccer practice. The study sample consists of 33 preschool ... [more ▼]

The objective of this study was to analyse the changes on gross motor development after five (T5), ten (T10) and 30 (T30) months of swimming or soccer practice. The study sample consists of 33 preschool-aged boys (4.8±0.5 yrs.): 11 soccer practitioners; 11 swimming practitioners; 11 controls (no previous involvement in sports). The Test of Gross Motor Development–Second Edition was used to assess common gross motor skills (locomotion, object control skills). Both experimental groups improved significantly in their gross motor quotient and the standard scores for locomotion and object control skills between T5 and T10. At T10, all soccer practitioners have already reached the maximum descriptive rating for the gross motor quotient. Between T10 and T30, swimming practitioners were able to improve the standard scores for object control skills. Main results showed a positive impact of swimming and soccer participation in motor proficiency. [less ▲]

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See detailSPÉCIALISATION SPORTIVE PRÉCOCE:QUELS RISQUES SUR LE DÉVELOPPEMENT ET SUR LA SANTE ?
Jidovtseff, Boris ULg

in Ortho-Rhumato (2016), 14(2), 21-25

Plusieurs travaux scientifiques menés dans les années 90 ont soutenu la thèse que pour espérer atteindre un jour le très haut niveau sportif, il fallait commencer un sport spécifique tôt et avec une ... [more ▼]

Plusieurs travaux scientifiques menés dans les années 90 ont soutenu la thèse que pour espérer atteindre un jour le très haut niveau sportif, il fallait commencer un sport spécifique tôt et avec une certaine intensité, ceux qui commençaient trop tard ayant très peu de chance d’atteindre l’élite sportive. La réussite de stars ayant commencé tôt, l’apparition de compétitions importantes pour les jeunes et la recherche de performance dès l’enfance ont contribué au développement de la spécialisation précoce. Pourtant, les études scientifiques montrent que cette approche n’est pas particulièrement efficace et de surcroît, peut poser des problèmes au niveau du développement de l’enfant et de sa santé. Les surcharges d’entraînement spécifique, mais aussi certains comportements alimentaires affecteraient la fonction endocrine. La répétition intense de gestes stéréotypés favoriserait l’apparition des blessures. D’autres éléments comme la pression, le manque d’amusement ou le manque de temps pour d’autres activités peuvent conduire l’enfant au dégoût et à l’abandon précoce. Ces dernières années, des solutions alternatives et adaptées aux enfants émergent comme les modèles de développement à long terme favorisant souvent des pratiques polysportives et une spécialisation progressive. Les modèles de compétitions qui influencent largement les pratiques doivent être revus afin de favoriser prioritairement les apprentissages moteurs et non pas rechercher la performance à tout prix. Finalement, les modèles de pratique devraient prendre en compte tous les enfants, aussi bien ceux qui souhaitent faire du sport de compétition que ceux qui souhaitent faire du sport pour leur bien-être. [less ▲]

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See detailEffects of twelve weeks of aerobic or strength training in addition to standard care in Parkinson’s disease: a controlled study
Demonceau, Marie ULg; MAQUET, Didier ULg; Jidovtseff, Boris ULg et al

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

BACKGROUND: Physical exercises in addition to standard care (SC) in patients with Parkinson’s disease (PD) are now common practice in many care units. However, exercises can cover a wide range of ... [more ▼]

BACKGROUND: Physical exercises in addition to standard care (SC) in patients with Parkinson’s disease (PD) are now common practice in many care units. However, exercises can cover a wide range of interventions, and the specific effects of different interventions still deserve to be further investigated. AIM: To compare the effects of 12 weeks of two different types of physical exercises with SC in patients suffering from PD. DESIGN: Pseudo-randomized controlled trial. SETTING: University laboratory for outcomes, University Hospital Centre for interventions. POPULATION: Fifty-two outpatients suffering from mild to moderate PD at baseline. METHODS: Participants were allocated to 3 groups: the strength training (ST) group performed individualized upper and lower limbs strength training, the aerobic training (AE) group performed tailored gradual aerobic cycling, and the third group received SC. The effects of the interventions on body function were assessed by measuring isokinetic concentric peak torque for knee extension and flexion, peak oxygen consumption (VO2peak) and peak work load (PWL) during an incremental maximal cycling test. Changes in mobility were evaluated from spatial-temporal gait features measured by mean of an accelerometer system and the six-minute walk distance (6mwd) test. We used questionnaires to estimate health-related quality of life and habitual physical activity. RESULTS: No significant changes in any outcome measures occurred in the SC group. More than 80% of the participants adequately completed the AE and the ST interventions. The ST group significantly improved all peak torque measures (p≤0.01), except knee extension in the least affected side (p=0.13). This group also improved the PWL (p=0.009) and 6mwd (p=0.03). The AE group improved the VO2peak (p=0.02) and PWL (p<0.001). CONCLUSION: Physical fitness in patients with PD rapidly improved in compliance with training specificities, but better fitness hardly translated into better mobility and health-related quality of life. CLINICAL REHABILITATION IMPACT: Physiotherapists can efficiently propose physical conditioning to patients with mild to moderate PD, but these interventions are insufficient to improve gait and participation. Notwithstanding, ST is an efficient intervention for improving walking capacity. [less ▲]

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See detailIs the Sørensen test valid to assess muscle fatigue of the trunk extensor muscles?
Demoulin, Christophe ULg; Boyer, Mathieu; Duchateau, Jacques et al

in Journal of Back and Musculoskeletal Rehabilitation (2016), 00

BACKGROUND: Very few studies have quantified the degree of fatigue characterized by the decline in the maximal voluntary contraction (MVC) force of the trunk extensors induced by the widely used Sørensen ... [more ▼]

BACKGROUND: Very few studies have quantified the degree of fatigue characterized by the decline in the maximal voluntary contraction (MVC) force of the trunk extensors induced by the widely used Sørensen test. OBJECTIVE: Measure the degree of fatigue of the trunk extensor muscles induced by the Sørensen test. METHODS: Eighty young healthy subjects were randomly divided into a control group (CG) and an experimental group (EG), each including 50% of the two genders. The EG performed an isometric MVC of the trunk extensors (pre-fatigue test) followed by the Sørensen test, the latter being immediately followed by another MVC (post-fatigue test). The CG performed only the preand post-fatigue tests without any exertion in between. RESULTS: The comparison of the pre- and post-fatigue tests revealed a significant (P <0.05) decrease in MVC force normalized by body mass (−13%) in the EG, whereas a small increase occurred in the CG (+2.7%, P = 0.001). CONCLUSIONS: This study shows that the Sørensen test performed until failure in a young healthy population results in a reduced ability of the trunk extensor muscles to generate maximal force, and indicates that this test is valid for the assessment of fatigue in trunk extensor muscles. [less ▲]

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See detailMODIFYING PHYSICAL ENVIRONMENT TO BE APPROPRIATE FOR CHILDREN
Jidovtseff, Boris ULg; Delvaux, Anne ULg; Mornard, Manhattan ULg

in Book of abstracts AISEP 2015 (2015, July)

Our experience confirms that adapting physical environments is critical for providing appropriate physical activity for 3 to 8 years old children.. Moreover, the pedagogy has to favour success, discovery ... [more ▼]

Our experience confirms that adapting physical environments is critical for providing appropriate physical activity for 3 to 8 years old children.. Moreover, the pedagogy has to favour success, discovery and a fun environment. This work illustrates what can be achieved and provides clear guidance for developing centres to support the promotion of physical activity in early childhood. [less ▲]

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See detailContribution à l’exploration de la performance musculaire sur le terrain
Jidovtseff, Boris ULg

Scientific conference (2015, April)

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See detailL'accoutumance à l'eau: un préalable au savoir-nager.
Mornard, Manhattan ULg; Delvaux, Anne ULg; Cloes, Marc ULg et al

in Éducation Physique et Sport (2015), (364), 16-20

Synthèse de la méthodologie et des travaux scientifiques réalisés au cours de ces dernières années par le cereki dans le domaine de l'accoutumance à l'eau.

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See detailÉvaluation et analyse de la performance par accélérométrie lors des mouvements de musculation
Jidovtseff, Boris ULg; Laffaye, Guillaume

in Arfaoui, Ahlem; Bertucci, William (Eds.) Métrologie et biomécanique (2015)

Since a decade, the accelerometry allows new measurements in biomechanics of sport. Small, light and transportable, these sensors allow to liberate from heavy force plates and offers new perspectives in ... [more ▼]

Since a decade, the accelerometry allows new measurements in biomechanics of sport. Small, light and transportable, these sensors allow to liberate from heavy force plates and offers new perspectives in the understanding of the performance in sport. The goal of this chapter is to present the concept of the accelerometry and to understand practical possibilities and limits in the assessment of muscular performance. The reliability of the accelerometers are highly depending on the level of technology and in the respect of manufacturer recommendations. These devices are used during exercises such as bench press or squat, allowing to analyze force-velocity-power profile, to estimate the 1-RM, to achieve biomechanical analysis or to track free weight exercises during work out. All of these applications are very precious for scientists and for coaches during training program or athletes follow-up. [less ▲]

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See detailAnalyse des sauts et de la course à pied par accélérométrie
Laffaye, Guillaume; Jidovtseff, Boris ULg

in Arfaoui, Ahlem; Bertucci, William (Eds.) Métrologie en biomécanique (2015)

The goal of this article is to understand the interests and limits of the accelerometry for assessing the performance in sport. More specifically, accelerometers are used during jumping tests (squat jump ... [more ▼]

The goal of this article is to understand the interests and limits of the accelerometry for assessing the performance in sport. More specifically, accelerometers are used during jumping tests (squat jump, countermovement jump, hopping on place test) to measure jump height, power, force and leg stiffness as well. During running, they are used for assessing velocity, step frequency, and other useful parameters for trainers or scientists in the understanding of this mode of locomotion. [less ▲]

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See detailThe reliability of isoinertial force-velocity-power profiling and maximal strength assessment in youth.
Meylan, César; Cronin, John; Oliver, Jon et al

in Sports Biomechanics (2015)

The purpose of this study was to quantify the inter-session reliability of force-velocity-power profiling and estimated maximal strength in youth. Thirty-six males (11-15 years old) performed a ballistic ... [more ▼]

The purpose of this study was to quantify the inter-session reliability of force-velocity-power profiling and estimated maximal strength in youth. Thirty-six males (11-15 years old) performed a ballistic supine leg press test at five randomized loads (80%, 100%, 120%, 140%, and 160% body mass) on three separate occasions. Peak and mean force, power, velocity, and peak displacement were collected with a linear position transducer attached to the weight stack. Mean values at each load were used to calculate different regression lines and estimate maximal strength, force, velocity, and power. All variables were found reliable (change in the mean [CIM] = - 1 to 14%; coefficient of variation [CV] = 3-18%; intraclass correlation coefficient [ICC] = 0.74-0.99), but were likely to benefit from a familiarization, apart from the unreliable maximal force/velocity ratio (CIM = 0-3%; CV = 23-25%; ICC = 0.35-0.54) and load at maximal power (CIM = - 1 to 2%; CV = 10-13%; ICC = 0.26-0.61). Isoinertial force-velocity-power profiling and maximal strength in youth can be assessed after a familiarization session. Such profiling may provide valuable insight into neuromuscular capabilities during growth and maturation and may be used to monitor specific training adaptations. [less ▲]

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See detailEditorial
Jidovtseff, Boris ULg

in Sciences et Sports - Journal des Sciences et de la Médecine de l'Homme en mouvement (2014), 29(Hors-série 1), 1

There are a number of positive challenges for Physical Education. Recent chearch shows that physical activity has a powerfull impact on the structure and functioning of the brain that opens up important ... [more ▼]

There are a number of positive challenges for Physical Education. Recent chearch shows that physical activity has a powerfull impact on the structure and functioning of the brain that opens up important avenues for research and practice. [less ▲]

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See detailEditorial
Jidovtseff, Boris ULg

in Science et sports (2014), 29(Hors-série 1), 2

Il y a un grand nombre d'aspects positifs dans l'éducation physique. Des études récentes montre que l'activité physique influence positivement le développement et le fonctionnement du cerveau, ouvrant des ... [more ▼]

Il y a un grand nombre d'aspects positifs dans l'éducation physique. Des études récentes montre que l'activité physique influence positivement le développement et le fonctionnement du cerveau, ouvrant des perspectives importantes de recherche mais aussi d'applications pratiques. [less ▲]

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See detailLe jardin d'accoutumance à l'eau CEReKI: une solution pour toutes les piscines
Delvaux, Anne ULg; Mornard, Manhattan ULg; Vandermeulen, Mary et al

in Science et sports (2014, October), 29(Hors-série 1), 12

La plupart des piscines publiques ont une petite profondeur de 80 cm et ne sont donc pas adaptées aux très jeunes enfants. Le CEReKI a mis en place un jardin d'accoutumance à l'eau afin que chaque enfant ... [more ▼]

La plupart des piscines publiques ont une petite profondeur de 80 cm et ne sont donc pas adaptées aux très jeunes enfants. Le CEReKI a mis en place un jardin d'accoutumance à l'eau afin que chaque enfant puisse s'accoutumer à l'eau "sans avoir spécialement pied". [less ▲]

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