Pascale Duché

Université de Toulon | USTV · UFR de Sciences et Techniques des Activités Physiques et Sportives (STAPS)

An emerging field of research has revealed a bidirectional relationship between sleep and diet, highlighting the potential role of a healthy diet in improving sleep. However, the impact of chrono-nutrition on sleep remains less explored. Here we conducted a systematic scoping review, considering the multiple dimensions of chrono-nutrition, to descr...

Si l'augmentation de la prévalence des maladies chroniques est due en partie à l'augmentation de l'espérance de vie et à un meilleur dispositif de diagnostic, l'exposition aux facteurs de risque pendant la période sensible de l'enfance est une hypothèse explicative de plus en plus étudiée. L'insuffisance d'activité physique et les comportements séd...

Sudlow, A, Galantine, P, Del Sordo, G, Raymond, J-J, Dalleau, G, Peyrot, N, and Duché, P. Influence of growth, maturation, and sex on maximal power, force, and velocity during overground sprinting. J Strength Cond Res 38(3): 491–500, 2024—In pediatric populations maximal anaerobic power, force, and velocity capabilities are influenced by changes in...

Citation: Saidi, O.; Souabni, M.; Del Sordo, G.C.; Maviel, C.; Peyrel, P.; Maso, F.; Vercruyssen, F.; Duché, P. Association between Low Energy Availability (LEA) and Impaired Sleep Quality in Young Rugby Players. Nutrients 2024, 16, 609. https:// Abstract: Low energy availability (LEA) has been associated with several physiological consequences, bu...

We aimed to develop a new field test to evaluate lower-limb muscle fatigability in young adults. In Experiment–A, we developed and determined the ability of an intermittent isometric wall-squat test to induce progressive level of muscle fatigability, as detected by the kinetics of changes in squat-jump height (SJH) and sit-to-stand time (STST) comp...

The aim of this study was to conduct a systematic review and meta-analysis of differences in energy and macronutrient intakes between young athletes and non-athletes, considering age, gender and sport characteristics. The study included original research articles that compared energy and macronutrient intakes of 8 to 18-year-old athletes to non-ath...

Juvenile idiopathic arthritis (JIA) is the most common rheumatic disease affecting young people. It has a profound impact on their physical, mental and social lives, leading to long-term disability. With the growing awareness of the importance of sleep in all areas of functioning in young people, an emerging literature has drawn attention to the ro...

Please cite this article as: Saidi O, Fantini M-L, Gruet M, Duché P, Commentary on Mohamed et al.: Inter-and intra-sleep variability deserve further attention in myalgic encephalomyelitis/chronic fatigue syndrome, Sleep Medicine Reviews (2023), doi: https://doi.

Purpose Childhood lymphoma survivors (CLSs) are at high risk of reduced daily activity. This work studied metabolic substrate use and cardiorespiratory function in response to exercise in CLSs. Methods Twenty CLSs and 20 healthy adult controls matched for sex, age, and BMI took an incremental submaximal exercise test to determine fat/carbohydrate...

Sleep is bi-directionally linked to energy balance. This crossover study design will evaluate the acute effect of a moderate energy deficit (500 kcal) induced by diet, exercise, or mixed (−250 kcal by diet and 250 kcal by exercise) on sleep and the next morning’s appetitive responses. The study sample comprises 24 healthy young adults. The experime...

Study objectives: To examine the effect of the timing of high-intensity exercise (afternoon vs. evening) on adolescent athletes' bedtime psychological state, sleep quality, sleep staging, and next-day wellness/sleepiness according to chronotype. Methods: Forty-two young athletes (morning type: n =12, intermediate type: n =14; evening type: n=16)...

In recent years, running has dramatically increased in children and adolescents, creating a need for a better understanding of running gait in this population; however, research on this topic is still limited. During childhood and adolescence multiple factors exist that likely influence and shape a child's running mechanics and contribute to the hi...

Juvenile idiopathic arthritis (JIA) is the most common rheumatic disease in young people. Although biologics now enable most children and adolescents with JIA to enjoy clinical remission, patients present lower physical activity and spend more time in sedentary behavior than their healthy counterparts. This impairment probably results from a physic...

The ability to produce muscle power during sprint acceleration is a major determinant of physical performance. The comparison of the force–velocity (F–v: theoretical maximal force, F0; velocity, v0 and maximal power output, Pmax) profile between men and women has attracted little attention. Most studies of sex differences have failed to apply a sca...

This study aimed to determine the short-term effect of two isocaloric diets differing in the ratio of protein–carbohydrate on melatonin levels, sleep, and subsequent dietary intake and physical activity in healthy young men. Twenty-four healthy men took part in a crossover design including two sessions of three days on isocaloric diets whether high...

The aim of this study was to examine the effect of delayed evening mealtime on sleep quality in young athletes. Twelve rugby players (age 15.8 ± 0.7 years) participated in a crossover within-participant design. Adolescents spent five consecutive days in each of two conditions, separated by a 2-week washout period: routine dinner (3.5 hr before bedt...

The transition from childhood to adulthood is characterized by many physiological processes impacting exercise performance. Performance fatigability and time to task failure are commonly used to capture exercise performance. This review aimed to determine the differences in fatigability and TTF between youth (including both children and adolescents...

The aim of this study was to examine the effect of delayed evening mealtime on sleep quality in young athletes. Twelve rugby players (age 15.8 ± 0.7 years) participated in a crossover within-participant design. Adolescents spent five consecutive days in each of two conditions, separated by a 2-week washout period: routine dinner (3.5 hr before bedt...

Introduction Based on Anses's report (2016)[1][1], the French Public Health Policy emphasizes on health status improvement by acting on physical activity and sedentary behaviors. Since 2016, many countries have collected results of large epidemiological studies providing new insights into the effect of physical activity- and mainly sedentary-relate...

Dear Colleagues, There is growing interest in the chrononutrition concept, according to which, eating behavior should relate to the body’s circadian rhythm. Typically, when considering this concept, three aspects are considered: i) irregularity (i.e., the inconsistency or inconsistency of a meal routine), ii) frequency (the number of meals or eati...

Despite the importance of sleep monitoring in the context of sport, few studies to date examined night-to-night sleep variability among adolescent athletes. This study compared night-to-night sleep variation between junior rugby players and age-matched non-athlete adolescents across seven consecutive nights of the in-season competitive phase. This...

Background. The transition from childhood to adulthood is characterized by many physiological processes which can impact physical exercise performance. Performance fatigability (i.e. decline in an objective measure of performance during and/or after exercise) and time to task failure (i.e. capacity for a participant to perform an exercise over an e...

Introduction: In January 2020, the World Health Organization declared the global out- break of the coronavirus disease 2019 a public health emergency and a pandemic in March 2020. As a response, the French government enforced an isolation period (" lockdown ") on March 17th 2020. Quarantine measures consisted of prohibition of unnecessary travels,...

Background: A better understanding of the influence of energy balance on sleep in adolescents, particularly those with obesity, could help develop strategies to optimize sleep in these populations. The purpose of this study was to investigate sleep under ad libitum-vs-controlled diets adjusted to energy requirement (eucaloric) among adolescents wi...

Abstract Study Objectives Juvenile idiopathic arthritis (JIA) is one of the most common pediatric rheumatic disease. However, sleep alteration associated with this auto-immune disease remain unclear. We aimed in this systematic review and meta-analysis to compare sleep duration, quality, and architecture in JIA subjects with those in their healthy...

This study compares the effectiveness of a 12-week moderate exercise training program (METP), performed in the morning versus the evening, on sleep, physical activity, physical fitness, sleepiness, fatigue and health-related quality of life (HRQoL) in overweight and obese patients. Sedentary and inactive overweight/obese adults (n = 36) were includ...

Objective: We evaluated substrate utilization during submaximal exercise, together with glycemic responses and hormonal counter-regulation to exercise, in children with type 1 diabetes mellitus (T1DM). Methods: Twelve pre-pubescent children with T1DM and 12 healthy children were matched by sex and age. Participants completed a submaximal incrementa...

Young athletes must contend with the constraints of elite sports on top of school commitments and the physiological processes associated with adolescence. This study assessed week and weekend sleep and schedule of activities in elite adolescent rugby players during the in‐season competitive phase compared with age‐matched non‐athlete controls. 32 a...

Objectives: This study aims to assess the validity, internal consistency, implementation, and feasibility of a sequence of tests, the Vitality Test Battery, designed to measure physical fitness, at a large scale in French older adults. Methods: A total of 528 volunteers (age ≥60 years) took the battery of 10 tests: 6-min walk, trunk strength, hand...

Abstract Faced with the spread of the SARS-CoV-2 virus, regulatory measures aiming to prevent interpersonal contaminations have been undertaken and among these, lockdown. Due to strong restrictions out-of-home movements, we hypothesize that overall physical activity will decrease and sedentary behavior increase. This could result in highest exposur...

Introduction: As part of the National Health Strategy, the High Council for Public Health (HCSP) was tasked with leading a reflection on a “comprehensive and concerted child health policy”. Policy-making requires relevant knowledge and statistical benchmarks. It therefore seemed useful to examine the French statistical system and active research t...

PurposeThis work studied the acute effects in healthy adults of evening exercise timing on their quality of sleep and dietary intake over the following 12 h.Methods Sixteen men and women, (age: 22.3 ± 1.4 years; BMI: 20.8 ± 1.4 kg/m2, intermediate chronotype) took part in three randomized crossover sessions spread over three consecutive weeks: cont...

Disturbed sleep is common in adolescents.The purpose of this clinical trial is to assess the effect of protein tryptophan (Trp)/large neutral amino acids (LNAAs) ratio on sleep and circadian rhythm. Ingested Trp is involved in the regulation of the sleep/wake cycle and improvement of sleep quality. Since Trp transport through the blood–brain barrie...

Aim To assess muscle function and functional abilities in children with juvenile idiopathic arthritis (JIA). Methods Fourteen children with JIA and 14 healthy controls matched for age and sex were included. Muscle characteristics, both structural (thickness, cross‐sectional area (CSA) and fascicle angle) and qualitative (intermuscular adipose tiss...

Objectif Une analyse qualitative et quantitative (méta-analyse) a été réalisée pour comparer le sommeil des enfants et adolescents atteints d’arthrite juvénile idiopathique (AJI) et de maladies inflammatoires de l’intestin (MICI) avec celui des sujets témoins appariés par l’âge. Méthodes En accord avec le standard PRISMA, 24 études ont été inclues...

Objectif Cette étude compare l’effet d’un programme d’activité physique adaptée (APA) (12 semaines), mis en place le matin vs le soir, sur le sommeil, la perte de poids, les capacités physiques, la fatigue, la somnolence et la qualité de vie d’adultes en surpoids ou obèses. Méthodes (n = 36) adultes obèses ou en surpoids (âge : 57 ± 10,05 ans ; IM...

Background: Leukemia is the most common cancer in pediatrics, with many late effects such as higher risk of dyslipidemia, insulin resistance, obesity, and metabolic syndrome. The objective of this work was to investigate substrate oxidation during submaximal exercise in survivors of childhood acute leukemia. Methods: A total of 20 leukemia survi...

Background Although adolescence and obesity are related to impaired sleep duration and quality, exercise was admitted as a nonpharmacological treatment for sleep and better control of energy balance. Objectives To investigate the acute effects of intense exercise on sleep and subsequent dietary intake. Methods Sixteen adolescent girls with obesit...

Introduction Stress and obesity are two public health issues. The relationship between obesity and stress is biological through the actions of stress on the major hormones that regulate appetite (leptin and ghrelin). Many spa resorts in France specialise in the treatment of obesity, but no thermal spa currently proposes a specific programme to mana...

Objective Work-related stress is a public health issue. Stress has multiple physical and psychological consequences, the most serious of which are increased mortality and cardiovascular morbidity. The ThermStress protocol was designed to offer a short residential thermal spa program for work-related stress prevention that is compatible with a profe...

Background/objectives: Survival rates in children diagnosed with malignant brain tumors exceed 70%. A higher risk of dyslipidemia, central obesity, and insulin resistance has been reported among these children. We investigated substrate utilization during submaximal exercise. Design/methods: Ten brain tumor survivors and 10 healthy children were...

Purpose: To examine the effect of drop height on vertical jumping performance in children with respect to sex and maturity status. Methods: Thirty-seven pre-pubertal, 71 circa-pubertal, and 69 post-pubertal boys and girls performed, in a randomized order, 2 squat jumps, 2 countermovement jumps, and 2 drop jumps (DJ) from heights of 20, 30, 40, 5...

The effect of exercise on sleep remains controversial in athletes especially in junior athletes. This study tested the acute effect of additional intense rugby training on sleep, next-day dietary intake, and physical performances in adolescent rugby players compared to a day with regular exercise. 17 male rugby players in the national under-17 cate...

Background: Children with juvenile idiopathic arthritis (JIA) have impaired physical abilities. TNF-α plays a crucial role in this pathogenesis, but it is also involved in the use of lipids and muscle health. Objective of this study was to explore substrate oxidation and impact of TNF blockade on energy metabolism in children with JIA as compared...

Objectives: The objective of this study was to evaluate muscular metabolic function in children with inactive juvenile idiopathic arthritis (JIA). Methods: Fifteen children with inactive JIA and fifteen healthy controls were matched by sex, biological age, and Tanner stage. Participants completed a submaximal incremental exercise test to determine...

Physical activity (PA) is essential for children throughout their growth and maturation. It improves physiological and psychological health and limits the risk of developing metabolic disorders. However, some chronic physiological and metabolic diseases may lead to decreased PA. The diversity of outcomes in the literature offers no consensus for ph...

[This corrects the article DOI: 10.1155/2018/9365745.].

This commentary is on the original article by Eken et al. on pages 212–218 of this issue.

The aim of this study was to measure the impact, at 24 h post-exercise, of a single exercise bout on plasma inflammatory markers such as calprotectin, IL-6, sIL-6 R, sgp130 and the hypothalamic-pituitary-adrenal (HPA) axis in children with juvenile idiopathic arthritis (JIA). Twelve children with JIA attended the laboratory on three consecutive day...

Objective In a context of inflammatory disease such as juvenile idiopathic arthritis (JIA), we do not know what impact physical activity may have on a deregulated immune system. The objective is to measure the impact of a single bout of exercise on plasma inflammatory markers such as calprotectin, IL-6, sIL-6R, sgp130, and the hypothalamic-pituitar...

The aim of this study was to determine whether prepubertal children are metabolically comparable to well-trained adult endurance athletes and if this translates into similar fatigue rates during high-intensity exercise in both populations. On two different occasions, 12 prepubertal boys (10.5 ± 1.1 y), 12 untrained men (21.2 ± 1.5 y), and 13 endura...

Objectives The purpose of this study was to investigate the spontaneous use of protein and carbohydrate supplements (PCS) in amateurs practicing resistance training in gyms, and determine whether the intake of this type of supplement in practice can have beneficial effects on energy balance and body composition. Equipment and methods Sixty-seven m...

Purpose: Obesity is recognised as a heterogeneous metabolic status whereby some obese individuals present a cardio-metabolic phenotype (metabolically "unhealthy" obese, MUO), while others have a lower risk phenotype (metabolically "healthy" obese, MHO). Especially noticed in adults, this phenomenon has also been observed in young populations. The a...

Purpose: Obesity is recognised as a heterogeneous metabolic status whereby some obese individuals present a cardio-metabolic phenotype (metabolically "unhealthy" obese, MUO), while others have a lower risk phenotype (metabolically "healthy" obese, MHO). Especially noticed in adults, this phenomenon has also been observed in young populations. The a...

Purpose: An acute bout of intense exercise realized in the morning has been shown to have a positive impact on obese adolescents energy balance, by both increasing energy expenditure and decreasing energy intake at lunch and more significantly at dinner. This project explored whether to prescribe a one or a two-session exercise on the same day with...

poster

Le Programme national nutrition santé (PNNS) vise à améliorer l’état de santé de la population en agissant sur les déterminants majeurs de la nutrition que sont l’alimentation et l’activité physique. L’Anses a été saisie par la Direction générale de la santé afin d’actualiser les repères nutritionnels relatifs à ces déterminants. Le rapport et l’av...

Excess body weight composes an important limitation to exercise in obese youth. The aim of this study was to compare the perceived exertion of obese adolescents between weight-bearing (WB; running) and non-weight-Bearing (NWB; cycling) exercises performed at moderate (55%VO2max) and high (75%VO2max) intensities. Twenty-four obese adolescents were r...

The rising prevalence of overweight and obesity among pediatric populations has become a major global concern. The objective of this review is to demonstrate potential interactions between the products released by fat tissue and the hormonal production of bone tissue in obese children and adolescents. Advancing the understanding of the complex int...

In the context of childhood obesity progression, sleep patterns have been associated with unhealthy eating habits and energy intake. The association between several eating habits and sleep patterns in children has been recently studied. The aim of this study was to explore the association between sleep patterns, eating habits, and physical fitness...

Background: Acute exercise has been shown to induce nutritional adaptations in obese and lean inactive youth but it remains unclear whether youth with a high level of physical activity experience such exercise-induced energy intake and appetite modifications. Methods: 14 (15- to 16-year-old) male elite rugby players completed sessions on three s...

Objective While indexes have been proposed to estimate total and abdominal adiposity in adults, the assessment of adiposity among obese adolescents remains difficult in clinical setting. The aim of this study was to evaluate the clinical applicability of total and visceral and fat mass indexes in obese adolescents.Methods One hundred and thirty, 12...

Although physical activity is primarily considered for its effects on energy expenditure for prevention and treatment of both overweight and obesity, its role in the regulation and control of energy balance seems more complex. Not only does physical activity affect energy expenditure, it also leads to modifications in energy intake and appetite tha...

Although physical activity is primarily considered for its effects on energy expenditure for prevention and treatment of both overweight and obesity, its role in the regulation and control of energy balance seems more complex. Not only does physical activity affect energy expenditure, it also leads to modifications in energy intake and appetite tha...

Although physical activity is primarily considered for its effects on energy expenditure for prevention and treatment of both overweight and obesity, its role in the regulation and control of energy balance seems more complex. Not only does physical activity affect energy expenditure, it also leads to modifications in energy intake and appetite tha...

Exercise has been shown to decrease subsequent energy intake, without modification of appetite, in adolescents who are obese. This study compared the impact of acute exercise with imposed sedentary behaviors on the daily nutritional adaptations and energy balance of youths with obesity. Body composition and maximal oxygen uptake were assessed in 10...

International Journal of Obesity is a monthly, multi-disciplinary forum for papers describing basic, clinical and applied studies in biochemistry, genetics and nutrition, together with molecular, metabolic, psychological and epidemiological aspects of obesity and related disorders

Our purpose was to investigate the effect of obesity in prepubertal children on the hormonal response to exercise performed under different conditions of nutrient availability. Prepubertal obese (age, 10.3 ± 1.8 years; %body fat, 36.1 ± 6.1; n = 9) and lean (age, 9.2 ± 1.6 years; %body fat, 22.2 ± 4.1; n = 7) children completed 2 experimental sessi...

Purpose: Abdominal and lower body fat mass tissues exhibit particular metabolic profiles at rest and during exercise. However, data are missing in normal weight women during exercise. The purpose of this study was to investigate the effect of low (LA/LB) and high (HA/LB) abdominal to lower body (A/LB) fat mass ratio on metabolic and hormonal respo...

Background: Physical activity is mainly used in weight control strategies to favour energy expenditure. Some evidence suggests that exercise might not have the expected impact on energy balance, and may actually cause a decrease in the subsequent physical activity energy expenditure. Objective: To question the impact of an acute exercise session...

Children's eating habits have mainly been related to anthropometric characteristics but less is known about their association with physical fitness. 278 French school children (131 boys and 147 girls) filled in eating habit questionnaires and completed anthropometric measurement (weight, height, skinfolds) and physical fitness tests. The 20-m Shutt...

The imbalance between energy expenditure and energy intake is the main factor accounting for the progression of obesity. For many years, physical activity has been part of weight-loss programmes to increase energy expenditure. It is now recognized that exercise can also affect appetite and energy consumption. In the context of seeking new obesity t...

Diet-induced weight loss is often limited in its magnitude and often of short duration, followed by weight regain. On the contrary, bariatric surgery now commonly used in the treatment of severe obesity favors large and sustained weight loss, with resolution or improvement of most obesity-associated comorbidities. The mechanisms of sustained weight...

The imbalance between energy expenditure and energy intake is the main factor accounting for the progression of obesity. For many years, physical activity has been part of weight-loss programmes to increase energy expenditure. It is now recognized that exercise can also affect appetite and energy consumption. In the context of seeking new obesity t...

Oral contraception (OC) and energy intake may play a role in fuel selection during exercise. The aim of this study was to investigate the effect of OCs (OC+ vs. OC-) in fed and fasting conditions on substrate oxidation and metabolic and hormonal responses in women during exercise. Substrate oxidation (respiratory exchange ratio and lipid and carboh...

The aim of the present study was to compare "absolute" and "relative" knee extension strength between obese and nonobese adolescents. Ten nonobese and 12 severely obese adolescent boys of similar chronological age, maturity status, and height were compared. Total body and regional soft tissue composition were determined using dual-energy X-ray abso...

During exercise, substrate utilization plays a major role in performance and disease prevention. The contribution of fat and carbohydrates to energy expenditure during exercise is modulated by several factors, including intensity and duration of exercise, age, training and diet, but also gender. Because sex hormone levels change throughout a woman'...

Physical exercise can modify subsequent energy intake and appetite and may thus be of particular interest in terms of obesity treatment. However, it is still unclear whether an intensive bout of exercise can affect the energy consumption of obese children and adolescents. To compare the impact of high vs. moderate intensity exercises on subsequent...

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