Jacques Prioux

Ecole normale supérieure de Cachan | ENS Cachan · Sciences Du Sport Et Education Physique (2SEP)

Purpose: Energy expenditure is a key parameter in quantifying physical activity. Traditional methods are limited because they are expensive and cumbersome. Additional portable and cheaper devices are developed to estimate energy expenditure to overcome this problem. It is essential to verify the accuracy of these devices. This study aims to valida...

Abstract This study aimed to examine the effects of two high-intensity interval training programs (HIIT) on maximal aerobic velocity (MAV), hematological variations and muscle damage markers in young healthy adults. Twenty-nine male physical education students, aged 20.3 ± 3.3 years, volunteered to participate in this study, and were randomly assig...

Introduction: Evidence regarding the impact of offshore sailing on fatigue and readiness variables is conspicuous by its absence. This study investigated the acute effects of an offshore sailing regatta on anthropometry, muscular performance, subjective recovery, and salivary biomarker cortisol. Methods: Ten professional offshore sailors from a...

PurposeTo identify the changes of ventilation (\(\dot{\mathrm{V}}\)E), tidal volume (VT) and respiratory frequency (fr) at different incremental step test intensities during maturation of children and adolescents.MethodsA semi-longitudinal study was conducted on 68 healthy untrained boys and girls aged 11–17 years. The subjects were separated into...

To examine the effects of two high-intensity intermittent training (HIIT) programs of varying intensities (100% vs. 110% of maximal aerobic velocity [MAV]) on metabolic, hormonal and inflammatory markers in young men. Thirty-seven active male volunteers were randomly assigned into: HIIT experimental groups (100% MAV [EG100, n = 9] and 110% MAV [EG1...

Background: This study aimed to (a) describe the physical fitness characteristics of semiprofessional rugby union (RU) players using VO2max (ml. min-1. kg-1), knee peak torque (PT), mean power (MP), hamstring: quadriceps (H:Q) ratio and basic anthropometrics characteristics. (b) compare backs and forwards across these same characteristics. Method...

Purpose The purpose of this study was to evaluate the accuracy of minute ventilation (V˙E) estimation using a novel method based on a non-linear algorithm coupled with cycle-based features. The experiment protocol was well adapted for remote health monitoring applications by exploiting data streams from respiratory magnetometer plethysmography (RMP...

This study aimed to determine the key performance indicators of inshore sailing during the sailing Tour de France. Technical and physical parameters were investigated to determine the discriminating factors between successful and less successful international level sailors. Measurements from 21 sailors (mean ± SD; age = 23.81 ± 4.18 years) were con...

This study aimed to i) identify key performance indicators of professional rugby matches, ii) define synthetic indicators of performance and iii) analyze how weekly workload (2WL) influences match performance throughout an entire season at different time-points (considering WL of up to 8 weeks prior to competition). This study uses abundant sports...

The precise measurement of respiratory variables, such that tidal volume, minute ventilation, respiratory rate is necessary to monitor respiratory status to overcome several diseases, improve patient health conditions and reduce health care costs. This measurement has conventionally been performed by breathing into a mouthpiece connected to a flow r...

Purpose: We studied the effect of two interval training programs of varying intensities (100% vs. 110% of maximal aerobic velocity [MAV]) on hematocrit (Ht), hemoglobin (Hb), and plasma volume variations (PVV) in young men. Methods: Thirty-nine male volunteered were assigned to two control groups (CG100, n = 9 and CG110, n = 10), and two trainin...

Dubois, R, Lyons, M, Paillard, T, Maurelli, O, and Prioux, J. Influence of weekly workload on physical, biochemical and psychological characteristics in professional rugby union players over a competitive season. J Strength Cond Res XX(X): 000-000, 2018-This study aimed to (a) quantify the physical workload (P-WL) during training and games througho...

Maurelli, O, Bernard, PL, Dubois, R, Ahmaidi, S, and Prioux, J. Effects of the competitive season on the isokinetic muscle parameters changes in world-class handball players. J Strength Cond Res XX(X): 000-000, 2018-The aim of this study is to investigate the effects of the competitive season on isokinetic muscular parameters of the lower limbs in...

Objectives: To determine the best method and combination of methods among global positioning system (GPS), accelerometry, and heart rate (HR) for estimating energy expenditure (EE) during level and graded outdoor walking. Design: Thirty adults completed 6-min outdoor walks at speeds of 2.0, 3.5, and 5.0kmh(-1) during three randomized outdoor wal...

The aim of this study was to describe the effects of eight weeks of pre-competitive period preparation (Pc2P) on the isokinetic muscular characteristics in world-class handball players. Nineteen male professional players (age: 26.6 ± 5.4 years) participated in the study. Two bilateral isokinetic tests of knee joint flexors (H; Hamstring) and extens...

Purpose: The purposes of this study were to both improve the accuracy of respiratory volume (V) estimates using the respiratory magnetometer plethysmography (RMP) technique and facilitate the use of this technique. Method: We compared two models of machine learning (ML) for estimating [Formula: see text]: a linear model (multiple linear regressi...

Introduction-Physical activity recognition is an emerging yet challenging research area. One of the critical challenges when monitoring physical activities is data acquisition, which has to be done under unconfined realistic conditions rather than laboratory controlled states (Oscar. 2013). In this context, several works have been carried out repor...

The aim of this study was to observe and quantify changes in training load (TL), running performance, lower body power and biochemical characteristics of professional rugby union back players over an entire season. Eight professional players (age: 25.8 ± 4.6 y) participated in this study. Session-RPE (S-RPE) and microtechnologies (GPS) were used fo...

As motion sensors are getting light-weighted and low-priced, there is a growing appetite for the accelerometer-based approaches for efficiently monitoring human activities. This paper proposes an original feature selection approach based on the spectral distances between a given signal and an activity model. This new technique is evaluated and comp...

The aims of this study were (1) to analyze elite rugby union game demands using 3 different approaches: traditional, metabolic and heart rate-based methods (2) to explore the relationship between these methods and (3) to explore positional differences between the backs and forwards players. Time motion analysis and game demands of fourteen professi...

We investigated the effect of Ramadan fasting on maximal aerobic velocity (MAV), time to exhaustion (tlim100), performance in running 3000-m in runners who trained at 09:00, 14:00, and 22:00 h. Twenty-four middle- and long-distance runners (28.5 ± 10.6 years) were assigned to 3 groups of 8 participants: an afternoon group (AG) (who trained between...

The objective of this study was to assess the accuracy of using speed and grade data obtained from a low-cost global positioning system (GPS) receiver to estimate metabolic rate (MR) during level and uphill outdoor walking. Thirty young, healthy adults performed randomized outdoor walking for 6-min periods at 2.0, 3.5 and 5.0 km⋅h(-1) and on three...

The aim of this study is to describe and quantify changes in training load (TL), fitness, power, anthropometric and biological characteristics throughout a professional rugby union season. Eight high-level players (age: 25.8 ± 4.6 y) participated in this study. Session-RPE (S-RPE) and microtechnologies (GPS) were used for assessing TL. During the s...

The aim of this study was to assess, for the first time, the accuracy of a low- cost global positioning system (GPS) receiver for estimating grade during outdoor walking. Thirty subjects completed outdoor walks (2.0, 3.5 and 5.0 km · h−1) in three randomized conditions: 1/level walking on a 0.0% grade; 2/graded (uphill and downhill) walking on a 3....

Objectif L’objectif de cette revue de littérature était de fournir, pour la première fois, une analyse synthétique des études ayant mis en évidence les différents intérêts cliniques de la mesure ambulatoire de l’activité physique (AP) et de la capacité de marche dans l’artériopathie oblitérante des membres inférieurs (AOMI). Méthode Nous avons men...

Methods for monitoring the human physical activity are recently investigated in order to assess the health status of the individuals and thus promote a healthier lifestyle. This paper proposes `dist-colorimetrics', a methodology that aims to represent and classify ambulatory activities based on the spectral distances measures. A data collection pla...

The purpose of the present review was to provide, for the first time, a comprehensive analysis and synthesis of the available studies that highlighted the clinical interest of the ambulatory assessment of either physical activity (PA) or walking capacity in patients with lower extremity peripheral artery disease (PAD). We identified 96 related arti...

The study aimed to analyse the influence of playing style on the physiological responses of offensive players and the match characteristics during table tennis matches. eight table tennis players were involved in the study. Among them, six players with an offensive playing style played respectively two matches: one against an offensive player (Off...

Elite athletes and coaches need some knowledge about the influence of playing surfaces on performance in tennis. In this way, the aim of this review is to give an oversight of recent results from scientific research about physiological, biomechanical and epidemiological effects of playing surfaces in tennis to help players and coaches enhance tenni...

PURPOSE: The study was designed to determine the effect of drafting on running time, physiological response and rate of perceived exertion (RPE) during 3000m-track running. METHODS: Ten elite middle and long distance runners performed three track-running sessions. The first session determined maximal oxygen uptake (VO2max) and maximal aerobic speed...

Precise measurement of sedentary behavior and physical activity is necessary to characterize the dose-response relationship between these variables and health outcomes. The most frequently used methods employ portable devices to measure mechanical or physiological parameters (eg, pedometers, heart rate monitors, accelerometers). There is considerab...

Elite athletes and coaches need some knowledge about the influence of playing surfaces on performance in tennis. In this way, the aim of this review is to give an oversight of the recent results from scientific researches about physiological, biomechanical and epidemiological effects of playing surfaces in tennis to help players and coaches to enha...

L'accélérométrie est une technique largement utilisée pour estimer la dépense énergétique (DE) mais présente quelques limites avec une surestimation la DE lors de la marche et une sous-estimation de la DE lors de marches ou de courses sur un terrain avec pente (Crouter et al., 2006). Dans ce contexte, le Géo-Positionnement Satellitaire (GPS) pourra...

The effect of endurance interval training (IT) on hematocrit (Ht), hemoglobin (Hb), and estimated plasma-volume variation (PVV) in response to maximal exercise was studied in 15 male subjects (21.1 ± 1.1 y; control group n = 6, and training group, n = 9). The training group participated in interval training 3 times a week for 7 wk. A maximal graded...

The effect of recovery mode (Active [AR] vs. Passive [PR]) on plasma catecholamine (Adrenaline [A] and Noradrenaline [NA]) responses to maximal exercise (Exemax) was studied during interval training (IT). 24 male subjects (21.1±1.1 years) were randomly assigned to a control group (CG, n=6), AR training group (ARG, n=9) or PR group (PRG, n=9). ARG a...

The aim of this longitudinal study was to compare two recovery modes (active vs. passive) during a seven-week high-intensity interval training program (SWHITP) aimed to improve maximal oxygen uptake (\( \dot{V}{\text{O}}_{{ 2 {\text{max}}}} \)), maximal aerobic velocity (MAV), time to exhaustion (t lim) and time spent at a high percentage of \( \do...

The aim of this article was to compare 2 portable devices (a heart-rate monitor and an electromagnetic-coil system) that evaluate 2 different physiological parameters--heart rate (HR) and ventilation (VE)--with the objective of estimating energy expenditure (EE). The authors set out to prove that VE is a more pertinent setting than HR to estimate E...

The aim of this paper is to validate a new method of energy expenditure (EE) estimation stemming solely from the measurement of rib cage, abdominal and chest wall distances. We set out to prove that the variations of these distances, measured by two pairs of electromagnetic coils, lead to the estimation of the ventilation (VE) and the EE. Eleven su...

Elite tennis players and coaches need some knowledge about the nature of physiological requirements of tennis matches. Indeed, according to the specificity principle of training, training programmes must be both physiologically and mechanically specific to the demands of the tennis1. In this way, the aim of this review is to give an oversight of th...

The aim of this study was to compare tennis matches played on clay (CL) and resin (R) courts. Six matches were played (3 on CL courts and 3 on R courts) by 6 high-level players. Heart rate (HR) was monitored continuously while running time (4.66 m), and blood lactate concentration ([La]) were measured every 4 games. Mean duration of points and effe...

The present study was designed to determine the aerobic and anaerobic energy contributions to 400-m Flat (400 mF) and 400-m hurdles (400 mH) using the accumulated oxygen deficit method. Six nationally ranked athletes, specializing in 400 mH and familiar with 400 mF volunteered to participate in this study. All the participants performed 3 track-run...

communication affichée lors du 15ème congrès de l'European College of Sport Science. Antalya (Turquie)

To validate a new device designed to measure ventilation (V(E)), tidal volume (V(T)), inspiratory time (T(I)), and expiratory time (T(E)) during daily life activities. The anteroposterior displacement of the rib cage and abdomen and the axial displacements of the chest wall and the spine were measured using two pairs of magnetometers. was estimated...

The aim of this study is to compare the relation between ventilation (VE) and oxygen uptake (VO2) [VO2=ƒ(VE)] and between heart rate (HR) and VO2 [VO2=ƒ(HR)]. Each one of the subjects performed three types of activities of different intensities (walking without load, walking with load and intermittent work). VO2, VE, and HR were measured continuous...

Several methods have tried to quantify physical activity using the relation between heart rate (HR) and oxygen consumption ($ \dot V $ \dot V O2). Considering the limits of this relation, we focus our work on another physiological index: ventilation ($ \dot V $ \dot V E). The aim of this study is to show that $ \dot V $ \dot V E is more strongly...

In this study, we examined the effects of three recovery intensities on time spent at a high percentage of maximal oxygen uptake (t90[Vdot]O(2max)) during a short intermittent session. Eight endurance-trained male adolescents (16 +/- 1 years) performed four field tests until exhaustion: a graded test to determine maximal oxygen uptake ([Vdot]O(2max...