A5066456620- Cardiovascular and exercise physiology
- Sports Performance and Training
- High Altitude and Hypoxia
- Heart Rate Variability and Autonomic Control
- Sports injuries and prevention
- Muscle activation and electromyography studies
- Cardiac Ischemia and Reperfusion
- Exercise and Physiological Responses
- Cardiovascular Effects of Exercise
- Cardiac Arrest and Resuscitation
- Muscle metabolism and nutrition
- Chronic Obstructive Pulmonary Disease (COPD) Research
- Hemodynamic Monitoring and Therapy
- Adipose Tissue and Metabolism
- Cardiovascular and Diving-Related Complications
- Musculoskeletal pain and rehabilitation
- Traumatic Brain Injury and Neurovascular Disturbances
- Climate Change and Health Impacts
- Motor Control and Adaptation
- Mitochondrial Function and Pathology
- Thermoregulation and physiological responses
- Neuroscience of respiration and sleep
- Children's Physical and Motor Development
- Genetics and Physical Performance
- Behavioral Health and Interventions
Université Laval
2016-2025
Institut Universitaire de Cardiologie et de Pneumologie de Québec
2016-2023
Victoria University
2012-2021
Universidade Federal do Piauí
2020
Universidade do Oeste Paulista
2020
Universidade Estadual Paulista (Unesp)
2020
University of Lynchburg
2020
Lung Institute
2017-2018
Victoria School of Management
2010-2015
Institut National du Sport, de l'Expertise et de la Performance
2014
Purpose: The anticipation of exercise-induced stress influences performance during continuous exercise. However, not all exercise is continuous. This study explores the influence prior knowledge sprint number on mechanical work, surface EMG, and RPE repeated-sprint (RSE). Methods: Fourteen athletes performed three RSE in random order. In one trial, subjects were informed that they would perform ten 6-s cycle sprints (with 24 s rest) then completed 10 (control CL). a second told to five...
Muscle ischemia and reperfusion induced by ischemic preconditioning (IPC) can improve performance in various activities. However, the underlying mechanisms are still poorly understood. The purpose of this study was to examine effects IPC on muscle hemodynamics oxygen (O2) uptake during repeated maximal contractions. In a cross-over, randomized, single-blind study, 10 strength-trained men performed 5 sets voluntary knee extensions right leg an isokinetic dynamometer, preceded either lower...
PurposeTo investigate the interaction between development of peripheral locomotor muscle fatigue, recruitment and performance during repeated-sprint exercise (RSE). MethodIn a single-blind, randomised cross-over design, ten male team-sport athletes performed two RSE (fifteen 5-s cycling sprints interspersed with 25 s rest; power self-selected) in normoxia acute moderate hypoxia (FIO2 0.138). Mechanical work, total electromyographic intensity (summed quadriceps electromyograms, RMSsum)...
This study examined the influence of muscle deoxygenation and reoxygenation on repeated-sprint performance via manipulation O2 delivery. Fourteen team-sport players performed 10 10-s sprints (30-s recovery) under normoxic (NM: FI 0.21) acute hypoxic (HY: 0.13) conditions in a randomized, single-blind fashion crossover design. Mechanical work was calculated arterial saturation (Sp ) estimated pulse oximetry for every sprint. Muscle deoxyhemoglobin concentration ([HHb]) monitored continuously...
Despite the limited research on effects of altitude (or hypoxic) training interventions team-sport performance, players from all around world engaged in these sports are now using more than ever before. In March 2013, an Altitude Training and Team Sports conference was held Doha, Qatar, to establish a forum practical insights into this rapidly growing field. A round-table meeting which panellists focused discussions concluded conference. This has resulted present position statement, designed...
Abstract Hammami, M, Negra, Y, Billaut, F, Hermassi, S, Shephard, RJ, and Chelly, MS. Effects of lower-limb strength training on agility, repeated sprinting with changes direction, leg peak power, neuromuscular adaptations soccer players. J Strength Cond Res 32(1): 37–47, 2018—We examined the effects explosive muscular performance incorporating 8 weeks into preparation junior male players, allocating subjects between an experimental group (E, n = 19) a matched control (C, 12). Controls...
Abstract Aim: The reduction in cerebral oxygenation (Cox) is associated with the cessation of exercise during constant work rate and incremental tests to exhaustion. Yet exercises this nature, ecological validity limited due being either fully or partly dictated by protocol, it unknown whether deoxygenation also occurs self‐paced exercise. Here, we investigated haemodynamics a 5‐km running time trial trained runners. Methods: Rating perceived exertion (RPE) surface electromyogram (EMG) lower...
This study examined the effects of post‐exercise cooling on recovery neuromuscular, physiological, and cerebral hemodynamic responses after intermittent‐sprint exercise in heat. Nine participants underwent three trials, including a control ( CONT ), mixed‐method MIX cold‐water immersion (10 ° C ; CWI ). Voluntary force activation were assessed simultaneously with oxygenation (near‐infrared spectroscopy) pre‐ post‐exercise, post‐intervention, 1‐h 24‐h post‐exercise. Measures heart rate, core...
Prior peripheral hypoxia induced via remote ischemic preconditioning (IPC) can improve physical performance in male athletes through improved O2 delivery and utilization. Since females may have an innate protective mechanism against ischemia-reperfusion injury, since muscle metabolism during contraction differs between sexes, it is relevant to examine the impact of sex response IPC determine whether also ergogenic females. In a randomized, crossover, single-blind study, we investigated...
Purpose: To determine if heavy resistance training in hypoxia (IHRT) is more effective at improving strength, power, and increasing lean mass than the same normoxia. Methods: A pair-matched, placebo-controlled study design included 20 resistance-trained participants assigned to IHRT (FIO2 0.143) or placebo 0.20), (n = 10 per group). Participants were matched for strength training. Both groups performed sessions over 7 weeks either with placebo. All tested 1RM, 20-m sprint, body composition,...
This study investigated the decrement in running performance of elite soccer players competing at low altitude and time course for abatement these decrements.Twenty youth had their activity profile, a sea-level (SL) 2 (Alt, 1600 m, d 4, 6) matches, measured with global positioning system. Measures expressed meters per minute match were total distance, low- high-velocity (LoVR, 0.01-4.16 m/s; HiVR, 4.17-10.0 m/s), frequency maximal accelerations (>2.78 m/s2). The peak subsequent stanza each...
Purpose: To understand the role of O 2 utilization in sex differences fatigue during intermittent activity, we compared cerebral (prefrontal lobe) and muscle (vastus lateralis) oxygenation men women repeated-sprint exercise (RSE). Methods: Ten 10 matched for initial-sprint mechanical work performed ten, s cycle sprints (with 30 rest) under normoxic (NM: 21% F I ) acute hypoxic (HY: 13% conditions a randomized single-blind crossover design. Mechanical was calculated arterial saturation (SpO...
To characterize the relationships between muscle oxygenation and performance during on- off-water tests in highly trained sprint canoe-kayak athletes.A total of 30 athletes (19 kayakers 11 canoeists) performed a maximal incremental test on canoe or kayak ergometer for determination VO2max examination relation peak power output (PPO) physiological parameters. A subset 21 also 200- 500- (for women) 1000-m men) on-water time trial (TT). Near-infrared spectroscopy monitors were placed latissimus...
Near‐infrared spectroscopy ( NIRS ) is a common tool used to study oxygen availability and utilization during repeated‐sprint exercise. However, there are inconsistent methods of smoothing determining peaks nadirs from the signal, which make interpretation comparisons between studies difficult. To examine effects averaging method on deoxyhaemoglobin concentration ([ HH b]) trends, nine males performed ten 10‐s sprints, with 30 seconds recovery, six analysis were for in [ b] signal. First,...
Purpose Endurance athletes often compete and train at altitude where exercise capacity is reduced. Investigating acclimation strategies therefore critical. Ischemic preconditioning (IPC) can improve endurance performance sea level through improved O2 delivery utilization, which could also prove beneficial altitude. However, data are scarce, there no study altitudes commonly visited by athletes. Methods In a randomized, crossover study, we investigated physiological responses in 13 male...
Abstract The extended endocannabinoid system, also termed endocannabinoidome, participates in multiple metabolic functions health and disease. Physical activity can both have an acute chronic impact on mediators, as does diet. In this crossover randomized controlled study, we investigated the influence of diet peripheral response to maximal aerobic exercise a sample active adult women (n = 7) with no underlying conditions. We compared 7-day standardized Mediterranean (MedDiet) control...
This study investigated the effects of body weight (BW) reduction and hypoxia on physiological perceptual responses during high-intensity interval exercise (HIIE) anti-gravity AlterG® treadmill. Twenty-six participants (12 women, age: 26.2 years, height: 170.4 cm, weight: 67.8 kg, VO2max: 61.1 mL/min/kg) completed a HIIE in 5 randomized conditions: normoxia at 100%BW; 80%BW; 60%BW; (FIO2 = 0.14) 60%BW. The included 3 sets 8 × 30-s efforts interspersed with rest 110% peak treadmill speed....
We examined the effect of recovery pattern on mechanical and neuromuscular responses in active men during three repeated-sprint ability tests consisting ten 6-s cycling sprints. Within each test, duration was manipulated: constant, increasing, decreasing pattern. Maximal voluntary contractions knee extensors were performed before after to assess strength electromyographic activity [root mean square (RMS)] quadriceps muscle. observed different fatigue patterns for peak power output between...
High-intensity intermittent sprints induce changes in metabolic and mechanical parameters. However, very few data are available about electrical manifestations of muscle fatigue following such sprints. In this study, quadriceps electromyographic (EMG) responses to repeated all-out exercise bouts short duration were assessed from maximal voluntary isometric contractions (MVC) performed before after Twelve men ten 6-s cycling sprints, separated by 30-s rest. The MVC pre-sprints ( pre),...