Javier Raya-González

Javier Raya-González
University Isabel I · Faculty of Health Sciences

PhD

About

148
Publications
76,449
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654
Citations
Introduction
Javier Raya-González currently works at the Faculty of Health Sciences, University Isabel I. Javier does research in Sport Sciences. His current project is about training load and strength training in soccer.

Publications

Publications (148)
Article
One of the most often-used task constraints in designing small-sided games (SSGs) is the manipulation of pitch size to promote increases or decreases in the relative area per player. Such adjustments cause changes in the acute responses during SSGs. This systematic review with meta-analysis aimed to compare the effects of smaller vs. larger pitch s...
Article
Full-text available
Background Knowing the impact of injuries is essential for their adequate management during reconditioning programs. Objective This study aimed to analyze the changes in match performance parameters in professional soccer players after sustaining an injury, which was defined according to injury severity. Methods Two-hundred and seven injuries rel...
Article
Background High metabolic load distance provides global information about the soccer players’ total high-intensity activities. Thus, this study aimed to examine the Spanish professional soccer players’ high metabolic load distance profile, comparing competitive level and playing positions. Methods A total of 18,131 individual match observations we...
Article
The aim of this paper was to examine how contextual factors affect match demands in amateur referees. Twenty-three field referees participated in this study. Match physical and physiological demands were monitored. Results showed that referees recorded greater total distance (p<0.01), Powermean (p<0.01), Speedmean (p<0.05) and Cadencemean (p<0.05)...
Conference Paper
Background Consumer and research activity monitors have become popular because of their ability to quantify energy expenditure (EE) in free-living conditions in a cost-efficient way. However, there is not research on the validity of this devices in people with Huntington’s disease (HD). Aims To determine the accuracy of the Actigraph and Fitbit co...
Conference Paper
Rationale Risk for or established malnutrition is frequent in Huntington´s disease (HD), accompanied by functional limitations, increased morbidity, and mortality. Phase angle is associate with changes in the structure of the cell membrane of soft tissue mass, alterations in fluid balance and it has been shown as an indicator of prognostic clinic i...
Conference Paper
Rationale Sarcopenia is associated with frailty, and dependence in older patients. Mediterranean Diet (MeDi) is one of the best models for healthy eating, associated with a better life quality in Huntington´s disease (HD). Targeted physical activity intervention has been identified as beneficial in several health disorders, including sarcopenia. Ou...
Preprint
BACKGROUND Among the different clinical manifestations, weight loss and energy balance (EB) deficit have been described frequently in Huntington's disease (HD), contributing to HD progression. To develop a therapeutic approach to prevent weight loss and EB deficit in HD, we will conduct a study designed to validate the usefulness of accelerometers...
Article
The aim of this study was to analyze the effects of a nutritional education program combined with the FIFA 11+ program on physical fitness attributes, physical activity levels, food and nutritional habits and nutritional knowledge in young basketball players. Twenty-three under 14 elite basketball players (13 males and 10 females) belonging to a pr...
Article
Full-text available
This umbrella review aimed to analyze the different variables of resistance training and their effect on hypertrophy, and to provide practical recommendations for the prescription of resistance training programs to maximize hypertrophy responses. A systematic research was conducted through of PubMed/MEDLINE, SPORTDiscus and Web of Science following...
Book
Full-text available
This book systematically summarizes the accuracy, precision, and repeatability levels of field-based tests applied in soccer. It considers such details as the effectiveness of tests for different age categories and sexes. In this book, the readers will be able to check all the field-based tests conceived for fitness assessment in soccer through a l...
Article
This study aimed to analyze the effects of a 16-week jump training program on the physical performance and lower extremities injury profile in semi-professional male soccer players. Participants were randomly assigned to the control group (CG; n=13; age = 21.7 ± 3.6 years) or the experimental group (EG; n=10; age = 22.3 ± 3.5 years). Countermovemen...
Book
Full-text available
The theory and methodology of training combine different factors that support the coach’s intervention for maximizing the athlete’s performance. Among these factors can be included the testing and monitoring, the definition of targets and structure of intervention, the planning, and the intervention itself or in a larger concept a hybrid model fact...
Article
Full-text available
The theory and methodology of training combine different factors that support the coach’s intervention for maximizing the athlete’s performance. Among these factors can be included the testing and monitoring, the definition of targets and structure of intervention, the planning, and the intervention itself or in a larger concept a hybrid model fact...
Article
Full-text available
This study analyzes the inter- and intra-differences in external load across the microcycle in professional female soccer players. External load during four consecutive microcycles (i.e., M1, M2, M3, and M4) and training sessions (i.e., MD-4, MD-3, MD-2, and MD-1) and a match day (i.e., MD) were registered in seventeen female professional soccer pl...
Article
Full-text available
The aim of this umbrella review was to provide a detailed summary of how flywheel training enhances strength and physical capacities in healthy and athletic populations. The eleven reviews included were analyzed for methodological quality according to the Assessing the Methodological Quality of Systematic Review 2 (AMSTAR 2) and the Grading of Reco...
Article
Full-text available
The main objective of this study was to analyse the changes in external demand parameters (e.g., total distance, high-speed running distance, accelerations/decelerations) in Spanish professional soccer teams after the COVID-19 lockdown considering their on-field ranking (i.e., teams whose ranking worsened after the COVID-19 lockdown [WRS] vs. teams...
Article
El objetivo fue analizar los efectos de la suplementación con zumo de remolacha (ZR) sobre el rendimiento deportivo en triatletas amateur, medido mediante un protocolo de media sentadilla bilateral y unilateral, y con una prueba de salto con contramovimiento (CMJ), en situación de fatiga. Doce triatletas amateurs participaron en este estudio aleato...
Chapter
The purpose of this section is to discuss the validity and reliability of field-based soccer tests for aerobic capacity in youth and adult soccer players. In this section, results from previous studies carried out on youth and adults will be presented. Whilst there were 21 studies demonstrating the validity and/or reliability of tests related to ae...
Article
Full-text available
El entrenamiento de sprint repetidos parece ser una estrategia eficiente para el desarrollo simultáneo de diferentes componentes de la condición física en deportes intermitentes. El objetivo del presente estudio fue analizar los efectos de suplementar el entrenamiento habitual, mediante un entrenamiento basado en sprint repetidos, sobre la capacida...
Article
Full-text available
The aim of this study was to quantify the acute impact of bouts duration and individual interaction space on physical and physiological demands and on physical performance. Ten young male soccer players (age: 14.8 ± 0.6 years) from the same team playing in the National U-16 Division participated. Physical (total distance [TD]; distance covered at d...
Article
Full-text available
The objective of this study was to assess the effects of an additional small-sided games (SSGs) training program during Ramadan intermitting fasting (RIF) on technical performance depending on changes in body composition, sleep habits, and ratings of perceived exertion (RPE). Twenty-four professional male basketball players from the Tunisian first...
Article
Purpose: The aim of this study was to describe the anthropometrical and cardiovascular characteristics of short course trail runners and analyze the associations, if any, between both anthropometric and cardiovascular features of amateur trail runners. Material and method: Anthropometrical evaluation and an incremental maximum test with 10% of grad...
Article
This study analyzed the effects of a training program based on Nordic Hamstring and sprint exercises on physical performance and hamstring injuries in young male soccer players. Forty-nine U19 players were randomly assigned to a control (CG; n = 26) or experimental group (EG; n = 23). Linear sprint and with change of direction (COD) were assessed b...
Article
This study examined the effects of body mass-based resistance training (bmRT) on selected measures of physical fitness and injury incidence and burden in soccer players. Forty-six U16 male soccer players were randomly assigned to an control (CG; n = 26) or experimental group (EG; n = 20) Countermovement jump (CMJ), change of direction (CoD) (i.e.,...
Article
Full-text available
Purpose: The purpose of this study was to examine the effects of 15 weeks (2/week) of two different resistance training (RT) programs [the self-load group (SG) vs. the overload group (OG)] on selected measures of physical performance in young male soccer players. Methods: The countermovement jump (CMJ), aerobic endurance (VO 2 max), and body compos...
Article
Introducción: Pocos estudios han sido encontrados donde se analicen los hábitos nutricionales, la composición corporal y la condición física de jóvenes futbolistas entre diferentes categorías y diferenciando entre chicos y chicas. Por tanto, el objetivo fue analizar las diferencias en los hábitos de consumo de alimentos, los parámetros de composici...
Article
Full-text available
Growing evidence supports use of eccentric methods for strength development and injury prevention within elite soccer, yet uncertainty remains regarding practitioners’ application of flywheel (isoinertial) methods. The aims of this study were to investigate how the flywheel training literature is perceived and applied by elite soccer practitioners,...
Article
Full-text available
Efectos de un programa de entrenamiento basado en nordic hamstring vs programa de entrenamiento basado en sprints en jugadores jóvenes de fútbol. Resumen: El objetivo del presente estudio es analizar el efecto de dos programas de entrenamiento, Nordic Hamstring (NH) y Sprint (SP) sobre la condición física en jugadores jóvenes de fútbol. Participaro...
Article
This study aimed to analyze the influence of the different contextual factors (i.e., defensive style and game outcome) on the basketball players’ external load during games-based drills using ultrawideband (UWB) technology. Fourteen male professional basketball players belonging to an elite reserve Spanish Club (ACB) participated in this study. The...
Conference Paper
Background Body composition is a strong indicator of nutritional and health status. Dual energy X-ray absorptiometry (DXA), multifrecuency bioelectrical impedance analysis (BIA), anthropometry and, skinfolds are non invasive methods to assess body composition with different levels of reliability. The validity of anthropometric and skinfolds to esti...
Article
Introduction: Aging is associated with a reduction in physical activity levels, leading to a decrease in strength and muscle mass, and affecting the minimum functional capacity to maintain an independent life. The literature agrees that strength training is one of the most important strategies to curb the effects of age, since it has been shown to...
Article
Full-text available
The aims of the current systematic review were to evaluate the current literature surrounding the chronic effect of flywheel training on the physical capacities of soccer players, and to identify areas for future research to establish guidelines for its use. Studies were identified following a search of electronic databases (PubMed and SPORTDiscus)...
Article
Full-text available
Background: Plyometric jump training (PJT) can be used for improving balance through bilateral and unilateral jump-landing drills. Since the increased number of articles testing the effects of PJT on dynamic and static balance, it is relevant to summarize the evidence and determine the effects across different original articles. Objective: This sys...
Article
The purpose of this study was to investigate the relationship between physical fitness and external load determined by local positioning system (LPS) in a simulated basketball game. Fourteen professional male basketball players performed a lane agility drill, 20-m maximal sprint speed, countermovement jump (CMJ), drop jump, and repeated sprint test...
Article
Objetivo: Los objetivos del presente estudio fueron describir las características antropométricas y la capacidad cardiovascular de corredores amateurs de trail running de corta distancia y analizar si existe asociación entre las características antropométricas y la capacidad cardiovascular en los corredores de montaña. Método: A un grupo de 10 corr...
Article
Small-sided games (SSGs) are a useful strategy to optimize the training process in soccer. The modification of some variables simultaneously implies several physical adaptations in soccer players. Thus, the aim of this study was to analyze the differences in the physical demands encountered by soccer players in different SSGs formats focusing on th...
Article
The aim of this study was to analyze the effect of different supplementation conditions on the flywheel half-squat fatigue and performance. Sixteen active males participated in the experimental intervention during a 4-week period. Four experimental conditions were stablished in a double-blind manner as follows: placebo, caffeine (CAF), beetroot jui...
Article
Full-text available
Background: Limited evidence exists comprehensively assessing physical fitness attributes, physical activity behaviors, nutritional habits, and nutritional knowledge according to sex in basketball players during early adolescence. Insight of this nature could be used to optimize the training process and lifestyles in young basketball players. Objec...
Article
The aim of this study was twofold: 1) to test for differences on the external and internal responses encountered by youth soccer players during four bouts of 5-a-side small-sided game (SSG) across age categories and, 2) to analyze the external and internal responses attending to players’ sprinting and jumping profile within each age-category (i.e.,...
Article
Full-text available
This systematic review with meta-analysis was conducted to assess the effects of small-sided games (SSG)-based training programs on bone mineral density (BMD) in untrained adults. The data sources utilized were Cochrane, Embase, Medline (PubMed), Scopus, SPORTDiscus, and Web of Science. The study eligibility criteria was: (i) Untrained adults (>18...
Article
Full-text available
The objective of this study was to evaluate the effects of a combined plyometrics and sled training carried out two days a week for 8 weeks. 60 young male soccer players were distributed in 4 groups (Under U16) [Experimental Group (U16 Exp, n=15) and Control Group (U16 Cont, n=15); and (Under19) [U19 Exp, (n=15) and U19 Cont, (n=15)]. The jump with...
Article
Background: The injury profile of each playing position in handball is a key factor in being able to improve the injury risk management process. Therefore, the aim of this study was to longitudinally analyze the differences in professional handball players’ injury profile according to their playing position (i.e., goalkeeper, back, wing and line)....
Article
Purpose: To examine the effects of acute caffeine supplementation on physical performance during fitness testing and activity during simulated games in basketball players. Methods: A double-blind, counterbalanced, randomized, crossover study design was followed. A total of 14 professional male basketball players ingested a placebo (sucrose) and...
Article
Full-text available
Background Football is the most popular sport among women; however, little is known about the injury profile in this population. This information would help design tailored injury risk mitigation strategies that may make football safer for women. Objective The aim of this study was to perform a systematic review and meta-analysis of epidemiologica...
Article
Full-text available
Background: Mental fatigue can impact physical demands and tactical behavior in sport-related contexts. Small-sided games (SSGs) are often used to develop a specific sport-related context. However, the effects of mental fatigue on physical demands and tactical behaviors during soccer SSGs have not been aggregated for systematical assessment. Object...
Article
Full-text available
(1) Background: Cyberbullying is a social concern in adolescents. The practice of physical activity is a key factor in protection against cyberbullying related to the multiple psychological benefits. Therefore, the study sets out to analyse the relationship between amount, types, enjoyment of physical activity and performance in physical education...
Article
This study aimed to: 1) compare physical fitness attributes and the external demands encountered during simulated matches in youth basketball players between age categories (under 14 years [U14], under 16 years [U16], and under 18 years [U18]), and 2) examine the relationships between physical fitness attributes and external demands during simulate...
Article
BACKGROUND: Hamstring injuries are the most prevalent time-loss injuries in sport, mainly in those modalities characterized by high-intensity and short-term actions, especially accelerations and decelerations during high-speed running. Expanding the knowledge about this type of injury and its preventive programs could be a key strategy to reduce th...
Article
Full-text available
Although asymmetries in lower limbs have been linked with players’ performance in male soccer players, literature that has been published addressing female soccer is scarce. Thus, the aim of this study was twofold: (i) describe the asymmetries of women soccer players during jumping, change-of-direction and range-of-motion tests; and (ii) test possi...
Article
Full-text available
The aim of this study was to compare external training loads between small-sided games (SSGs) and large-sided games (LSGs) in soccer players. Twenty outfield soccer players (14.8 ± 0.6 years old) who competed in the Spanish U16 Provincial Division and belonged to the same team participated in the study. The soccer sided games were played at differe...
Article
Full-text available
This study was performed aimed at comparing multidirectional bilateral and unilateral jump performance and passive range of motion (ROM) of lower limbs between soccer and basketball young players and evaluating associations between inter-limb ROM asymmetry and bilateral jump performance. A total of 67 young male athletes participated in this study,...
Article
Objectives The main aim of this study was to analyze the effects of including additional speed and endurance sessions during a small-sided games (SSG) training periodization on physical fitness in professional soccer players. Material and methods Sixteen outfield players (age = 25.6 ± 7.6 years) who competed in the First Division of an European Lea...
Article
This study aimed to evaluate the effect of flywheel training on female populations, report practical recommendations for practitioners based on the currently available evidence, underline the limitations of current literature, and establish future research directions. Studies were searched through the electronic databases (PubMed, SPORTDiscus, and...
Article
This study investigated the effects of a weekly flywheel resistance training session over a 10-week period during the competitive season on U16 soccer players' physical performance with special attention to change of direction ability (e.g. deficit [CODdef]). Twenty elite young soccer players were recruited and assigned to an experimental (EG, n =...
Article
Objective Beetroot juice (BJ) supplementation has been reported to enhance skeletal muscle contractile function; however, it is currently unclear whether BJ supplementation elicits comparable improvements in power output during different types of skeletal muscle contractions. The purpose of the current study was to assess the effect of BJ supplemen...
Article
Full-text available
Background: Even from a young age, modern soccer requires high levels of physical fitness development, particularly jumping and sprinting. Plyometric jump training (PJT), combined with young athletes’ regular soccer sessions, has the potential to improve jumping and sprinting. However, studies exploring the effects of PJT are generally limited by s...
Article
Full-text available
Considering nutrition education interventions have been frequently implemented in team sport athletes and have shown promising results, this study aimed to summarize the effects of nutrition education interventions on eating habits, nutrition knowledge, body composition, and physical performance in team sport athletes. A systematic review was condu...