Search Results: 1 - 10 of 7604 matches for " Philippe Passelergue "
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NO INFLUENCE OF HYPOXIA ON COORDINATION BETWEEN RESPIRATORY AND LOCOMOTOR RHYTHMS DURING ROWING AT MODERATE INTENSITY
Nicolas Fabre,Stéphane Perrey,Philippe Passelergue,Jean-Denis Rouillon
Journal of Sports Science and Medicine , 2007,
Abstract: Besides neuro-mechanical constraints, chemical or metabolic stimuli have also been proposed to interfere with the coordination between respiratory and locomotor rhythms. In the light of the conflicting data observed in the literature, this study aimed to assess whether acute hypoxia modifies the degree of coordination between respiratory and locomotor rhythms during rowing exercises in order to investigate competitive interactions between neuro-mechanical (movement) and chemical (hypoxia) respiratory drives. Nine male healthy subjects performed one submaximal 6-min rowing exercise on a rowing ergometer in both normoxia (altitude: 304 m) and acute hypoxia (altitude: 2877 m). The exercise intensity was about 40 % and 35 % (for normoxia and hypoxia conditions, respectively) of the individual maximal power output measured during an incremental rowing test to volitional exhaustion carried out in normoxia. Metabolic rate and minute ventilation were continuously collected throughout exercise. Locomotor movement and breathing rhythms were continuously recorded and synchronized cycle-by-cycle. The degree of coordination was expressed as a percentage of breaths starting during the same phase of the locomotor cycle. For a same and a constant metabolic rate, acute hypoxia did not influence significantly the degree of coordination (mean ± SEM, normoxia: 20.0 ± 6.2 %, hypoxia: 21.3 ± 11.1 %, p > 0.05) while ventilation and breathing frequency were significantly greater in hypoxia. Our results may suggest that during rowing exercise at a moderate metabolic load, neuro-mechanical locomotion-linked respiratory stimuli appear "stronger" than peripheral chemoreceptors- linked respiratory stimuli induced by hypoxia, in the context of our study
Effect of an Integrated Resistance Program Based Weightlifting Exercises on Improving Physical Performance of Young Table Elite's Tennis Players [PDF]
Kaabi Sofiene, Souhail Hermassi, Kaabi Safa, Phillipe Passelergue
Advances in Physical Education (APE) , 2016, DOI: 10.4236/ape.2016.64037
Abstract: The purpose of our study was to find out the results of a training program based on the Olympic exercises (weightlifting), on the performance of strength and power in high-level table tennis players. Thirty elite table tennis players (age 18.05 ± 1.04 years) were randomly divided into a control group (CG; n = 15) and an experimental group (WRTG; n = 15). The last group followed a weightlifting training program for 6 weeks with 3 sessions per week during the competitive period. As for the control group, he pursued classical table tennis training. Before and after the 6-week training program, all players have conducted tests on sprint distance of 5 m, the vertical jump (squat jump and countermovement jump), strength hand grip, throwing medicine Ball, the 1-RM bench press and 1-RM 1/2 squat test. A slight raise in the 1-RM maximum strength of upper and lower limbs (respectively p < 0.05; 7.87 kg or 8.29% and p < 0.04; +10.7 kilograms or 17.75%) for the WRTG compared to CG this evolution was followed by an obvious changes in strength hand grip at the EG compared to CG (p < 0.01; 4.6 kg or 13.54% of development). According to the outcomes of our study, we can declare that a strength training program during three sessions per week during the competitive period, can lead to a developed strength in the maximum lower limb, the and vertical jump among the elite table tennis players. The identification such as results could be considered a reliable device for coaches and technicians concerned to develop the performance of their table tennis players.
Team Play in Football: How Science Supports F. C. Barcelona's Training Strategy [PDF]
Philippe Chassy
Psychology (PSYCH) , 2013, DOI: 10.4236/psych.2013.49A2002
The paper applies the theory of self-organising systems to sport. The central hypothesis is that team play, implemented as passing in football, is the central factor generating performance. Data from the 2013 European Champions League were used to show that passing speed and precision predict domination (possession), shooting opportunities and performance. By using principal component analysis, the article offers a formula to estimate the team play of any team considering its passing speed, passing precision and ability to score. The compound measure accounts for about 42% of the variance in performance. The impact of this research on the training of football players is discussed.
Inductive Modelling of Vulnerable Sustainability Systems [PDF]
Philippe Woloszyn
Journal of Service Science and Management (JSSM) , 2015, DOI: 10.4236/jssm.2015.84060
Abstract: Within the context of globalisation, managing territorial resources means overcoming the following problems: difficulty in implementing integrated management processes at various organisation levels; conflicting uses; unadapted decision systems, assymetric information and uneven operative processes in each dimension of sustainable development. To illustrate and overpass those difficulties in a territorial level, we propose to introduce an analogical induction-model to describe both vulnerability situations and associated resilience procedures. The construction of this model is founded on a truly integrated approach, combining the economic, social-cultural, and ecological aspects of territorial vulnerability. Constituted by three passive components as potential energy, kinetic energy, and energy dissipation, this approach assumes that economics are a social extension of a environmental energy system. So we claim that social and ecological pillars could be defined as subsystems of a global open inductive sustainability system which considers feedbacks as evolution sources. An applicative illustration of this model will then be presented, through a case study describing 2012's American severe drought event.
Introducing a HPV Vaccination Program: the Experience in the State of Geneva, Switzerland (2007-2009) [PDF]
Emilien Jeannot, Philippe Sudre, Philippe Chastonay
World Journal of Vaccines (WJV) , 2011, DOI: 10.4236/wjv.2011.12003
Abstract: Objective: The objective of this study is to assess the HPV vaccination coverage of 11 to 19 year-old girls during a state coordinated HPV vaccination program in Geneva, Switzerland, from September 2007 to December 2009. Methods: The HPV vaccination program was coordinated by the State Medical Office. It relied on practitioners in private practice, on the School Health Service and on a temporary vaccination structure at the Geneva University Hospital. Each service provider transmitted quarterly to the State Medical Office the nominal list of the persons who had received their first, second or third shot. The data were processed through the Téléform © software and analyzed to assess the HPV cover-age of the target population. Results: The global coverage rates on December 31st 2009, 2 years after the program had been launched, were 48.1% for one dose, 43.7% for two doses and 41.6% for three doses of the HPV vaccine. These rates were quite different from one cohort to another: for girls born in 1995 (14 year-old), cover rates were 70% for the first, 68.1% for second and 65.1% for the third dose. Conclusion: This study shows that it is possible to obtain a high coverage rates after two years of a state coordinated HPV vaccination program.
Urban Soundscape Informational Quantization: Validation Using a Comparative Approach [PDF]
Philippe Woloszyn, Thomas Leduc
Abstract: Through interaction with environmental parameters such as light or sound, urban and architectural spaces generate ambiences with identifiable characteristics. This notion of ambiences is related to the human being position through its perception of environmental physical phenomenon during a pedestrian walk. Presented work aims to evaluate, so as to characterize, the impact of sound ambiences (soundscape) onto an urban pedestrian pathway using GIS spatial dynamical mapping. To carry out this scheme, our research work within AMBIOFLUX project concerns spatial interaction between sound ambience (soundscape) and man urban spatial trajectory (soundwalk). Spatial impression of soundsources or soundmarks has to be both defined through acoustical measurement and perception informational evaluation. The remainder of this paper is dedicated to the evaluation's methodology of the pedestrian pathway's acoustic fingerprint using the GearScape spatial formalism described thereafter. Preliminary results we have obtained will also be presented and validated.
Characteristics of Patients with Upstaging by Sentinel Lymph Node Biopsy of the N0 Neck in Head and Neck Cancer [PDF]
Didier Dequanter, Philippe Lothaire
Journal of Cancer Therapy (JCT) , 2011, DOI: 10.4236/jct.2011.22037
Abstract: Introduction: To investigate the possible role of sentinel lymph node biopsy (SLNB) to upstage the N0 neck in patients with oral and oropharyngeal squamous cell carcinoma. Methods: Patients with T1-T2 oral and oropharyngeal squamous cell carcinoma accessible to injection and staged N0 into the neck by palaption and CTscan were enrolled in the study. All patients underwent regular follow-up to identify possible recurrence. Results: A sentine lymph node biopsy was performed by 21 consecutive patients. 4 of the 21 patients were upstaged by SNLB. There was a mean follow-up of 31 months. Two patients developed subsequent disease after having been staging by SLNB, respectively negative in one case and positive in the other case. Tumor site, the staging of the primary tumor, presence of ulceration, tumor thickness were the same in the upstaged initially N0 patients. Conclusions: Sentinel lymph node biopsy can be used to upstage the N0 neck patients in perhaps well defined patients.
Biomarkers and atrial fibrillation: A new paradigm for assessing the progression of left atrial endocardial remodelling [PDF]
Philippe Chevalier, Alina Scridon
Open Journal of Clinical Diagnostics (OJCD) , 2012, DOI: 10.4236/ojcd.2012.22004
Abstract: Atrial fibrillation is a heterogeneous disorder that is usually characterized by paroxysmal onset, particularly in patients without structural heart disease. Defining biological markers of atrial remodelling would help identify patients at high risk who would benefit most from prophylactic treatment and careful monitoring. Biomarkers of atrial fibrillation progression would be helpful for following patients that present with asymptomatic atrial fibrillation. Notably, the roles of such markers in the pathophysiology of atrial fibrillation must be determined. Some markers may indicate the presence, complications or progression of the disease, while others may be involved in key pathological processes and thus represent novel therapeutic targets. Although a number of markers have been reported as potential predictors of paroxysmal atrial fibrillation progression towards persistent arrhythmia, their usefulness and clinical value need further validation. This report reviews several newly identified markers of atrial fibrillation progression.
Maxillo-mandibular rehabilitations with very early osteointegrated dental implants for severe hypodontia and anodontia related to ectodermal dysplasia [PDF]
Philippe Martin, Christian Paulus
Open Journal of Stomatology (OJST) , 2012, DOI: 10.4236/ojst.2012.24046
Abstract: The ectodermal dysplasias are rare diseases with hypodontia, hypotrichosis and hypohidrosis. The subject's life is considerably constrained and this from an early age, with major difficulties for the integration and acceptance of conventional prosthetic occlusal rehabilitation. The use of implants is an integral part of early treatment, in the regions of stable growth, that is to say symphysis. In two childs of 5 and 6 years we have made implant-borne prosthetic rehabilitation in the maxilla and the mandible. Aesthetic and social evaluation were positive. We have restored the normal oro-facial functions for the correct development of skeletal bases. They acted as an external fixator intraoral, stimulating the growth by the function. Our question was: can we leave a child throughout his childhood and adolescence with a not suitable removable prosthesis, under the pretext of growth unfinished?
Effect of Bicuspid Aortic Valve Cusp Fusion on Aorta Wall Shear Stress: Preliminary Computational Assessment and Implication for Aortic Dilation [PDF]
Kai Cao, Philippe Sucosky
World Journal of Cardiovascular Diseases (WJCD) , 2015, DOI: 10.4236/wjcd.2015.56016
Abstract: The bicuspid aortic valve (BAV) is a major congenital valvular abnormality and is associated with a high prevalence of aortic dilation, whose expression depends on the type of leaflet fusion. Although BAV hemodynamics is considered a potential pathogenic contributor, the impact of BAV fusion on ascending aorta (AA) wall shear stress (WSS) remains largely unknown. A fluid-structure interaction approach was implemented to predict the hemodynamics and WSS characteristics in realistic AA models subjected to the flow of a normal tricuspid aortic valve (TAV) and three BAV morphotypes (left-right coronary cusp fusion (LR), right-non coronary cusp fusion (RN) and non-left coronary cusp fusion (NL)). TAV flow conditions subjected the proximal and middle AA to a streamlined flow typical of flows in bends, while BAV flow conditions generated increased flow helicity. The LR-BAV orifice jet generated flow abnormalities primarily in the proximal AA, which were marked by a uniform WSS overload along the wall circumference and contrasted WSS directionalities on the wall convexity and concavity. Flow abnormalities generated by the RN-BAV and NL-BAV inlet flow conditions were more diffuse and consisted of WSS overloads in the convexity of the proximal and middle AA and contrasted WSS directionalities in the anterior and posterior wall regions. This study demonstrates the impact of the BAV morphotype on AA hemodynamics and provides quantitative evidence for the existence of WSS abnormalities in aortic wall regions prone to dilation.