Olivier Dupuy

Université de Poitiers | UP · UFR Sciences du sport

The objectives of the study were (i) to evaluate the effects of whole‐body cryostimulation (WBC) after training as an effective tool to improve sleep and recovery and (ii) to determine which exposure schedule for WBC (immediately after training vs. 1h before bedtime) is the most appropriate to improve sleep and recovery. Twenty‐two well‐trained mal...

Purpose To investigate the effects of a repeated-sprint training in hypoxia induced by voluntary hypoventilation at low lung volume (RSH-VHL) including end-expiratory breath holding (EEBH) of maximal duration. Methods Over a 4-week period, twenty elite judo athletes (10 women and 10 men) were randomly split into two groups to perform 8 sessions of...

To expand TEMPA, in this paper, we first aimed to clarify 2 fundamental phenomena: (a) the permanent evolutionary drive to conserve energy, which is juxtaposed with (b) seemingly contradictory examples showing that some individuals have a natural urge to move more, especially children. We then highlighted how the strength of these general tendencie...

The aim of this study was to evaluate the effects of daily whole-body cryostimulation (WBC) sessions during 5 consecutive days on wellness and sleep parameters in healthy young men and women. Twenty healthy subjects (9 women; 11 men) aged 23.1 ± 2.6 years old participated in this randomized protocol, with 5 consecutive days with (CRYO) or without W...

Team-based physical activity (PA) can improve social cognition; however, few studies have investigated the neurobiological mechanism underlying this benefit. Accordingly, a hyper-scanning protocol aimed to determine whether the interbrain synchrony (IBS) is influenced by an acute bout of team-based PA (i.e., tandem rope skipping). Specifically, we...

Background: The rise in the aging population highlights the need to address cognitive decline and neurodegenerative diseases. Intermittent hypoxia (IH) protocols show promise in enhancing cognitive abilities and brain health. Objective: This review evaluates IH protocols' benefits on cognition and brain health in older adults, regardless of cogn...

Background Overreaching is often linked to a deterioration in sleep quality, yet a comprehensive review is lacking. The aim of this systemic review and meta-analysis was to synthesise the literature and quantify the effect of overreaching from endurance-based training on sleep quality. Method The review was conducted following the PRISMA guideline...

A recent meta-analysis published in British Journal of Sports Medicine by Feil and colleagues delivers a disconcerting verdict: the ‘successful translation of a positive intention into behaviour is nearly at chance’ (p. 1). The inability to act on intentions to be physically active is particularly concerning in the context of the global health chal...

Cardiovascular endurance and muscular fitness seem to impact specific cognitive components in older females. However, it remains uncertain whether these relate to executive functions or if these correlations are limited to specific physical fitness indicators. This study aimed to determine the association between specific physical fitness component...

While the dopaminergic system is important for cognitive processes, it is also sensitive to the influence of physical activity (PA). We summarize current evidence on whether PA-related changes in the human dopaminergic system are associated with alterations in cognitive performance, discuss recent advances, and highlight challenges and opportunitie...

Background Cryostimulation and cold-water immersion (CWI) have recently gained widespread attention due to their association with changes in cardiovascular and cardiac autonomic control responses. Therefore, the aim of the present systematic review and meta-analysis was to identify the global impact of such cold exposures on cardiovascular and card...

Advancing age is associated with declines in cognitive function. Although physical activity is thought to protect against this decline, it is unclear how a short-term uptake in daily steps or a decline in day-to-day step variability may contribute to cognition among older adults. We tested associations between changes in step counts, day-to-day ste...

Cryotherapy has garnered significant attention in several medical and high-level sport performance domains. Although it is necessary to evaluate this technique’s efficacy in recovery processes, numerous studies have shown its usefulness in improving physical performance. Multiple physiological and psychological mechanisms have been identified. The...

The benefits of cold have long been recognized in sport and medicine. However, it also brings costs, which have more rarely been investigated, notably in terms of sensorimotor control. We hypothesized that in addition to peripheral effects, cold slows down the processing of proprioceptive cues, which has an impact on both feedback and feedforward c...

Frailty is characterized by an increased vulnerability to adverse health events. Executive function impairment is an early sign of progression towards cognitive impairments. Whether frailty is associated with executive function and the associated mechanisms are unclear. We test the hypothesis that higher frailty is associated with worse executive f...

The number of older people worldwide is constantly increasing. However, ageing is accompanied by a decline in cognitive ability that can affect quality of life. Cognitive, physical and social activities can all slow this decline but social factors and their contribution to the well-being remain under-researched. The aim of this study is to analyse...

The aim of this study is to measure the difference in skin temperature variation between males and females during a 4-min whole-body cryotherapy (WBC) exposure. Nine males (31 ± 13 years, 175 ± 5 cm, 76 ± 9 kg, and 17 ± 13 % BF) and nine females (31 ± 14 years, 167 ± 1 cm, 59 ± 10 kg, and 24 ± 4 % BF) volunteered to participate at this study. Their...

This study aimed to investigate the effect of partial-body cryostimulation (PBC) on microvascular responsiveness and muscular metabolic O2 consumption rate (m V˙ O2). Twenty healthy young adults (ten males and ten females) underwent post-occlusive reactive hyperaemia (PORH) test at the flexor digitorum superficialis area before and after a 3-min PB...

Funding Acknowledgements Type of funding sources: Foundation. Main funding source(s): Mirella and Lino Saputo Research Chair in Cardiovascular Diseases and the Prevention of Cognitive Decline from Université de Montréal at the Montreal Heart Institute. Montreal Heart Institute and the EPIC Center Foundations. FB are financially supported by a grant...

In addition to reduced VO2max, cardiac index and elevated vascular resistance, patients with type II diabetes showed reduced cerebral hemoglobin (O2Hb and HHb) during early recovery (0 – 2 min) after a CPET and lower performances in executive functions compared to healthy control. Cerebrovascular responses with a CPET and during the recovery phase...

Cardiovascular and cerebrovascular diseases are prevalent in individuals with type 2 diabetes (T2D). Among people with T2D aged over 70 years, up to 45% might have cognitive dysfunction. Cardiorespiratory fitness (V˙O2max) correlates with cognitive performances in healthy younger and older adults, and individuals with cardiovascular diseases (CVD)....

Purpose: To examine the reliability of scores calculated from virtual reality (VR) games and their association with inhibitory control and cognitive flexibility in young elite rugby players. Methods: Following a familiarization session, seventeen rugby union players completed a session of a modified Stroop test and two sessions of three VR games co...

Aging is characterized by cognitive decline affecting daily functioning. To manage this socio-economic challenge, several non-pharmacolog- ical methods such as physical, cognitive, and com- bined training are proposed. Although there is an important interest in this subject, the literature is still heterogeneous. The superiority of simultaneous tra...

The rapid increase in population aging and associated age-related cognitive decline requires identifying innovative and effective methods to prevent it. To manage this socio-economic challenge, physical, cognitive, and combined stimulations are proposed. The superiority of simultaneous training compared to passive control and physical training alon...

Introduction Exercise is known to improve cognitive functioning and the cardiorespiratory hypothesis suggests that this is due to the relationship between cardiorespiratory fitness (CRF) level and cerebral oxygenation. The purpose of this systematic review is to consolidate findings from functional near-infrared spectroscopy (fNIRS) studies that ex...

Recovery after exercise is a crucial key in preventing muscle injures and in speeding up processes to return at the homeostasis level. There are several ways of developing a recovery strategy with the use of different kinds of traditional and up-to date techniques. The use of cold has traditionally been used after physical exercise for recovery pur...

Increasing cerebral oxygenation, more precisely the overactivation of the prefrontal cortex (PFC), reflects cortical control of gait in stroke disease (1,2). Studies about the relationship between brain activation and the functional status in stroke patients remain scarce. The aim of this study was to compare brain activation, gait parameters, and...

Backgroung Muscle wasting is frequent in chronic obstructive lung disease (COPD) and associated with low branched-chain amino acids (BCAA). We hypothesized that BCAA supplementation could potentiate the effect of a pulmonary rehabilitation program (PRP) by inducing muscular change. Materials and methods Sixty COPD patients (GOLD 2-3) were involved...

Aim: The aim of the current study was to assess whether executive function and prefrontal oxygenation are dependent on fitness level and age in older adults. Methods: Twenty-four healthy males aged between 55 and 69 years old were recruited for this study. They were stratified by age, leading to the creation of two groups: 55-60 years old and 61...

La thérapie par le froid ou cryothérapie a longtemps été utilisée pour soulager les douleurs et les symptômes inflammatoires. De nos jours, ce que nous appelons cryothérapie ou cryostimulation à corps entier (CCE) indique une exposition (ou une série d’expositions) administrée dans une chambre froide dans laquelle la température de l'air peut attei...

We assessed the effects of a 3-min partial-body cryostimulation (PBC) exposure-where the whole body is exposed to extreme cold, except the head-on cognitive inhibition performance and the possible implications of parasympathetic cardiac control and cerebral oxygenation. In a randomized controlled counterbalanced cross-over design, eighteen healthy...

The aim of this study was to evaluate the impact of using a cooling vest during physical exercise (per-cooling) in humid and temperate conditions (≈22°C, ≈80% relative humidity) on perceptual and physiological responses (tissue oxygenation and heart rate). 20 physically active men performed twice a 30-min cycling exercise at 70% of their theoretica...

Complementary data concerning the work Douzi Wafa, Guillot Xavier, Bon Delphine, Seguin François, Boildieu Nadège, Wendling Daniel, Tordi Nicolas, Dupuy Olivier, Dugué Benoît: 1H-NMR-based analysis for exploring knee synovial fluid metabolite changes after local cryotherapy in knee arthritis patients. Metabolites 2020, 10(11), 460; https://doi.org...

Rehabilitation using cryotherapy has widely been used in inflammatory diseases to relieve pain and decrease the disease activity. The aim of this study was to explore the metabolite changes in inflammatory knee-joint synovial fluids following local cryotherapy treatment (ice or cold CO 2). We used proton nuclear magnetic resonance (1 H NMR) spectro...

Increasing cerebral oxygenation, more precisely the overactivation of the prefrontal cortex (PFC), reflects cortical control of gait in stroke disease. Studies about the relationship between brain activation and the functional status in stroke patients remain scarce. The aim of this study was to compare brain activation, gait parameters, and cognit...

Increasing cerebral oxygenation, more precisely the overactivation of the prefrontal cortex (PFC), reflects cortical control of gait in stroke disease. Studies about the relationship between brain activation and the functional status in stroke patients remain scarce. The aim of this study was to compare brain activation, gait parameters, and cognit...

Introduction: Regular aerobic exercise is associated with better executive function in older adults. It is unclear if high-intensity-interval-training (HIIT) elicits moderate-intensity continuous training (MICT) or resistance training (RT). We hypothesized that HIIT would augment executive function more than MICT and RT. Methods: Sixty-nine older a...

PurposeA predominance of parasympathetic drive is observed following cold exposure. Such modulation of the autonomic nervous system (ANS) is associated with faster post-exercise recovery. Within this context, whole-body cryotherapy (WBC) has been spreading in sport medicine, though the optimal temperature and frequency are unclear. The aim of this...

Research shows that negative or threatening emotional stimuli can foster movement velocity and force. However, less is known about how evaluative threat may influence movement parameters in endurance exercise. Based on social self-preservation theory, the authors predicted that evaluative threat would facilitate effort expenditure in physical exerc...

Introduction: Many studies have reported that regular physical activity is positively associated with cognitive performance and more selectively with executive functions. However, some studies reported that the association of physical activity on executive performance in younger adults was not as clearly established when compared to studies with ol...

There are many important sport events that are organized in environments with a very hot ambient temperature (Summer Olympics, FIFA World Cup, Tour de France, etc.) and in hot locations (e.g., Qatar). Additionally, in the context of global warming and heat wave periods, athletes are often subjected to hot ambient temperatures. It is known that exer...

There are many important sport events that are organized in environments with a very hot ambient temperature (Summer Olympics, FIFA World Cup, Tour de France, etc.) and in hot locations (e.g., Qatar). Additionally, in the context of global warming and heat wave periods, athletes are often subjected to hot ambient temperatures. It is known that exer...

To improve cognitive function, moving the body is strongly recommended; however, evidence regarding the proper training modality is still lacking. The purpose of this study was therefore to assess the effects of high intensity interval training (HIIT) compared to moderate intensity continuous exercise (MICE), representing the same total training lo...

The severity of the hot and humid conditions to which miners are exposed increases as the depth of the work site increases. This can cause heat stress that can greatly affect the health and safety of workers. To resolve this, a cooling garment has been developed that uses an atmospheric discharge of liquid CO 2 to create a cool microclimate with an...

This study aimed to evaluate the effects of cardiorespiratory fitness (CRF) and mean arterial pressure (MAP) on the prefrontal cortex (PFC) oxygenation and dual-task performance in healthy young males. Changes in the concentration of oxygenated (ΔHbO2) and deoxygenated hemoglobin (ΔHHb) in the right and left PFC were examined during a cognitive aud...

Reviews on cardiovascular fitness and cognition in older adults suggest that a higher level of cardiorespiratory fitness may protect the brain against the effects of aging. Although studies reveal positive effects of cardiorespiratory fitness on executive function, more research is needed to clarify the underlying mechanisms of these effects in old...

Stroke patients often exhibit difficulties performing a cognitive task while walking, defined as a dual task (DT). Their prefrontal cortex (PFC) activity is higher in DT than in single task (ST). The effects of an increasing load on PFC activity during DT in subacute stroke patients remains unexplored. Our objective was to assess the effects of N-b...

Background: Hypertension guidelines recommend moderate-intensity continuous training (MICT) for the primary or secondary prevention of hypertension. However, alternative modalities, such as high-intensity interval training (HIIT) on dry land or in water, have been studied less widely. Aim: To assess chronic blood pressure (BP) response to a 2-we...

Background: The aim of this study was to compare the effects of carbohydrate (CHO) drinks (6% per volume) sweetened with maple (syrup or sap) to a commercial sports drink, glucose, and a control solution (water) on cognitive flexibility during high-intensity intermittent exercise. Methods: Eighty-five active men completed six 3-min bouts at 95%...

Master athletes are often considered as exemplars of successful aging thanks to their capacity to maintain a high sports performance during their entire life. A high training capacity, regular participation in sporting competitions and delayed alterations in body composition and physiological capacities have been listed amongst the main factors con...

Cold therapy or cryotherapy has long been used to relieve pain and inflammatory symptoms. Nowadays, whole-body cryotherapy-an extreme cold therapy-which lasts 1-3 min, and given in a cold room in which the air temperature maybe-110°C or less is also used. Important series of data have been collected in the context of injury prevention, recovery aft...

Introduction: Hyperthermia during exercise induces central and peripheral fatigue and impairs physical performance. To facilitate heat loss and optimize performance, athletes can hasten body cooling prior (pre-cooling) or during (per-cooling) exercise. However, it is unclear whether per-cooling effect is the same on ‘aerobic’ and ‘anaerobic’ types...

Stroke patients often exhibit difficulties performing a cognitive task while walking, defined as a dual task (DT). Their prefrontal cortex (PFC) activity is higher in DT than in single task (ST). The effects of an increasing load on PFC activity during DT in subacute stroke patients remains unexplored. Our objective was to assess the effects of N-b...

Objective: The aim of the present investigation was to determine whether using cryostimulation (partial-body cryostimulation) impacts sleep quality in professional soccer players. Different exposure durations at −180°C were tested randomly after standardized training sessions in 9 professional soccer players (no cryostimulation, 180-s exposure, tw...

Ten highly-trained Jiu-Jitsu fighters performed two repeated-sprint sessions, each including 2 sets of 8 x ~6 s back-and-forth running sprints on a tatami. One session was carried out with normal breathing (RSN) and the other with voluntary hypoventilation at low lung volume (RSH-VHL). Prefrontal and vastus lateralis muscle oxyhaemoglobin ([O2Hb])...

A cooling garment for deep mine activities has been developed. It uses the atmospheric discharge of liquid CO2 to treat a constant airflow and create a cool microclimate with an average temperature of 12.5 (±0.4) ℃ under the garment, thus assisting the evaporating of the sweat and cooling the body. To evaluate its cooling efficiency, 19 male subjec...

Master athletes are genuine examples of successful ageing thanks to their capacity of maintaining a high level of sports performance during their entire life. Within the last decade many studies have focused on the evolution of performance in many sports with ageing, as well as on the training modalities to reach such performance. On the contrary,...

Regular physical activity has been recognized as an effective strategy for limiting the cognitive decline observed during aging. Much evidence has supported that maintaining a high level of physical activity and cardiorespiratory fitness is associated with better cognitive performances across the lifespan. From childhood to adulthood, a high level...

Exercise training during evening may disturb sleep patterns and hinder recovery process. The present study aimed to examine the effect of whole body cryotherapy (WBC) exposure after training in the evening on sleep quality and night heart rate variability (HRV). A total of 22 physically active men were randomized to undergo either WBC (3-min at −40...

Introduction/Background Pre-frontal cortex (PFC) activity during dual task (DT) condition in stroke patients remains unclear. Functional near-infrared spectroscopy (fNIRS) is a functional neuroimaging technique for studying cortical activity. The purpose of this study was to evaluate the hemodynamic activity of the PFC in two DT conditions in post-...

Introduction/purpose: This study compared cognitive performances and cardiac autonomic measures of higher fit and lower fit middle-aged and older highly active adults. The working hypotheses were that higher fit (master athletes) would show cognitive benefits in executive control conditions due to a high level of fitness compared to lower fit peop...

The benefits of physical exercise on brain function and its metabolism are well documented, and it is established that acute aerobic exercise could enhance executive function. The aim of this study was to report the effect of exercise intensity during acute intermittent exercise (IE) on executive function and heart rate outcomes. Twenty male subjec...

Introduction: The aim of the present work was to perform a meta-analysis evaluating the impact of recovery techniques on delayed onset muscle soreness (DOMS), perceived fatigue, muscle damage, and inflammatory markers after physical exercise. Method: Three databases including PubMed, Embase, and Web-of-Science were searched using the following term...

An evidence-based approach to choose the recovery you need to reduce muscle damage, soreness, fatigue and inflammation: a systematic review with meta-analyses / Douleurs musculaires après exercice physique : une méta-analyse pour connaître les techniques de récupération les plus efficaces (Frontiers in Physiology 2018, in revision)

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