José M Muyor

University of Almería | UAL · Department of Education

Background: The aim of this study was to systematically review research on the effect of soccer ball characteristics on ball-to-head contact. Methods: This systematic review was conducted using electronic databases, which included PubMed, Cochrane, and Web of Science. The search strategy combined keywords related to soccer, the ball and its charact...

The vigilant monitoring of training load contributes to evidence-based decision-making aimed at reducing injury risks and enhancing player performance. In the realm of soccer, particularly at the highest levels, the employment of sport scientists in this capacity has become commonplace, with professionals fulfilling this role on a daily basis. Tech...

The cyclist’s posture is typically characterized by a trunk flexion position to reach the handlebar of the bike. The pelvis serves as the base of the spine, and its tilt has been associated with the degree of extensibility of the hamstring, particularly in flexion postures of the trunk. The aim of this study was to determine whether, in professiona...

Background Sitting for long periods of time and lack of physical activity in young adults can cause postural deterioration leading to rapid onset of fatigue and increase the risk of back pain. We were interested in whether there are gender differences in spinal curvature among university students with a predominantly sedentary lifestyle. Methods 2...

Oliva-Lozano, JM, Chmura, P, Granero-Gil, P, and Muyor, JM. Using microtechnology and the Fourier Transform for the analysis of effective activity time in professional soccer. J Strength Cond Res XX(X): 000–000, 2023—This study aimed to investigate the use of the fast Fourier transform (FFT) for the analysis of effective activity time in profession...

This study aims to compare muscle activity in the pectoralis major, anterior deltoid, and triceps brachii in the horizontal bench press exercise with a prone grip at 150% and 50% of the biacromial width and the seated chest press exercise with two types of grips (a neutral grip at ~150% of the biacromial width and a prone grip at ~200% of the biacr...

Duathlon is a rapidly promoting sport, so it is necessary to identify the factors that influence performance. This study aimed to analyse internal and external loads and the interactions between them during running legs before and after cycling in duathlon. Twenty-three male and female athletes participated in a simulated duath-lon (5k-20k-5k). Int...

The aims of this study were to investigate the periods in which sprints occurred during official matches and analyze these sprints considering the effect of the playing position and different contextual variables. Electronic performance and tracking systems were used for the analysis of all sprints performed by players. Matches were recorded by vid...

This chapter aimed to review the literature about levels and trends of sexual activity in older adults of different countries. Studies of ten countries that provided adequate data were reviewed: United Kingdom, United States of America, Finland, India, Cuba, Mexico, Norway, Denmark, Belgium, and Portugal. In all countries levels of sexual activity...

Background and aim We aimed to capture the breadth of health outcomes that have been associated with the presence of Urinary Incontinence (UI) and systematically assess the quality, strength, and credibility of these associations through an umbrella review and integrated meta-analyses. Methods We assessed meta-analyses of observational studies bas...

(1) Background: Cycling is characterized by a sustained sitting posture on the bicycle, where physiologic spinal curvatures are modified from standing to cycling. Therefore, the main objective was to evaluate and compare the morphology of the spine and the core muscle activity in standing posture and cycling at low intensity. (2) Methods: Twelve co...

The aims of this technical report were to analyze the validity of real-time data collected by electronic performance and tracking systems (EPTS) and investigate the effect of varying real-time receiver's position on the real-time data collected. Physical performance data were collected from professional soccer players using EPTS. In addition, 3 rea...

Pullover and straight arm pulldown exercises are commonly used in resistance exercise programs to improve sports performance or in physical activity health programs. This study aimed to evaluate the individual electromyographic (EMG) activity of the pectoralis major (clavicular, sternal, and costal portions), latissimus dorsi, anterior deltoid, tri...

Background: The aim of this study was to analyze the effect of the length of the microcycle (ie, training period from the day after the match to the following match) on the daily external load and perceived wellness of professional soccer players (Spanish LaLiga Smartbank). Hypothesis: The length of the microcycle has a significant effect on the da...

The aim of this study was to analyze the association between teams’ success at the end of the season and match running, and technical-tactical performance in two professional soccer leagues. Match running, and technical-tactical performance data were collected during two consecutive seasons. A Factor Analysis was conducted to reduce the number of p...

Background: seated behaviour and a lack of physical activity among university students may cause changes to posture leading to health problems. We were interested whether between-gender differences in spinal curvature exist among university students with a predominantly sedentary lifestyle. Methods: a group of 20 female (age 20 ± 0.73 years) and 39...

This study aimed to analyse physical performance relative to peak locomotor demands of match play. Data were collected during 13 professional soccer matches. Initially, the 1-minute peak values were registered in each match, including the percentage of the total distance (TD), high-speed running distance (HSRD), sprinting distance (SPD), and high-m...

Cycling is a sport where cyclists predominantly adopt a sitting posture, with the trunk tilted forward. This posture requires a high volume of training and duration in several intensities of effort. This study aims to: 1) evaluate the behaviour of the thoracic and lumbar spine flexion and sacral inclination in the sagittal plane, the thoracic and l...

Objectives: To 1) examine the periods in which maximal intensity sprints occurred during professional soccer matches and 2) analyze the maximal intensity sprints registered in match play considering the effect of playing position and other contextual variables. Methods: A total of 1252 match observations were collected from 277 male professional...

Hamstring extensibility is a crucial component of athletic performance and spinal health. In this regard, hip range of motion analysis through standardized clinical tests has been used as a valid and reliable method for measuring hamstring extensibility. Consequently, new inertial devices have been designed for this purpose. The aims of this study...

The use of inertial and physiological sensors in a sport such as judo is scarce to date. The information provided by these sensors would allow practitioners to have a better understanding of sports performance, which is necessary for an accurate training prescription. The purpose of this study was to use inertial and physiological sensors in order...

Background The aims of this study were to (1) determine the match technical and running performance required by different teams based on their final ranking position in a professional soccer league; and (2) analyze the correlation between teams’ success at the end of the season and variables related to match technical and running performance. Meth...

The aim was to know if cycling affects spinal morphology in postures off the bicycle, such as adapting the spinal curvatures on the bicycle depending on the handlebar type and position on the handlebars. A systematic review was conducted following the PRISMA guidelines. The studies selected met the following criteria: a) the study design was cross-...

The aims of this study were (1) to determine the match running performance required by different teams based on their final ranking position and (2) to analyze the association between match running performance variables and team success at the end of the season. A total of 1,224 match observations from professional soccer teams competing during two...

The aim of this study was to systematically review the literature investigating the physical demands of sexual intercourse and to synthesize the evidence related to this research topic. Original studies published on PubMed, Scopus, and Web of Science up until April 2020 were examined. The Effective Public Health Practice Project scale was used to a...

The objectives of this study were threefold: (i) to analyze the load-velocity relationships between mean propulsive velocity (MPV), mean velocity (MV), peak velocity (PV), and relative load during the inclined leg press exercise; (ii) to analyze the differences in the load-velocity relationships between males and females; and (iii) to determine gen...

Background The aims of this study were to (1) analyze the distribution of the player load (PL TOTAL ) in 3 axes of movement (PL AP , anterior-posterior; PL ML , medial-lateral; PL V , vertical) during elite soccer matches, (2) investigate the effect of playing position on PL-related variables, and (3) explore the association between PL TOTAL and di...

The world’s football-governing body, FIFA, developed the FIFA Quality Programme to set internationally recognized industry standards for electronic performance and tracking systems (EPTS). The positioning and velocity data from different EPTS, discretized into velocity bands, were validated against criteria measures. Discussions have been ongoing b...

Background: Although low back fatigue is an important intervening factor for physical functioning among sedentary people, little is known about its possible significance in relation to the spinal posture and compensatory postural responses to unpredictable stimuli. This study investigates the effect of lumbar muscle fatigue on spinal curvature and...

The aims of this study were to identify the key external and internal load variables in professional futsal through principal components analysis (PCA), and analyse the physical performance required by the players in official matches. Data were collected from 14 female players during 10 matches using WIMU PROTM. The PCA selected a total of 22 varia...

The aims of this study were to 1) determine the key load indicators in professional soccer through principal component analysis (PCA); and 2) analyse the load variability of each training and match day within the microcycle considering the principal components. Data from 111 load variables were collected using tracking systems in both training and...

This study analysed the periods in which the most demanding passages (MDP) of play occurred during professional soccer matches, considering different criterion variables and investigating the effect that the playing position had on the MDP-of-play occurrence for each criterion variable. The MDP of play were calculated based on five criterion variab...

The aims of this research were to analyse the effect that different playing positions, passage durations and starting status had on the most demanding passages (MDP) of play in professional football matches. Players were categorized by positions and the MDP of distance (DIS), high-speed running distance (HSRD) and sprinting distance (SPD) were anal...

Background: The leg press is one of the most typical exercises for strengthening the lower limbs. The objectives of this study were to compare 5 inclined leg press exercise conditions, varying the feet width stance (100% or 150% hip width), the feet rotation (0° or 45° external rotation) on the footplate and using 2 different movement velocities (...

The aims of this study were to examine the periods in which the maximum speed actions occurred during elite soccer matches and analyse these actions considering the effect of playing position and different contextual variables. Performance-related variables (VMAX: maximum speed; Vo: starting speed; SPD: sprinting distance; ACCMAX: maximum accelerat...

The purpose of this study was to analyse the impact of match-related contextual variables (match location, match outcome and level of the opponent) on the weekly training load in a professional soccer team throughout a full competitive season. Total distance, high-speed running distance (HSRD, > 18 km·h-1), highmetabolic load distance (HMLD, > 25.5...

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The bench press exercise on a Smith machine, frequently used in training programs, can be analyzed as a redundantly actuated biomechanical system. In this exercise, a simplified model having one degree of freedom, actuated at the shoulder and the elbow, provides a meaningful representation of its dynamics. Due to the actuation redundancy, many diff...

Knee joint muscle activation imbalances, especially weakness in the vastus medialis oblique, are related to patellofemoral pain within the female population. The available literature presents the leg press as an exercise which potentially targets vastus medialis oblique activation, thus reducing imbalances in the quadriceps muscles. The main aim of...

The aims of this study were to establish sources of variability in match physical performance of professional soccer players and provide a method for monitoring individual between-match changes. Eleven players meeting the final inclusion criteria were monitored through an entire in-season competition phase (n = 240 individual match observations). T...

ABSTRACT: The aims of this study were to describe the worst-case scenarios (WCS) in professional soccer players calculated by fixed length and rolling average methods with regards to each playing position. This was done, firstly, by comparing total distance (TD covered in the WCS; secondly, by comparing high-speed running distance (HSRD); and third...

The development of wearable sensors has allowed the analysis of trunk kinematics in match play, which is necessary for a better understanding of the postural demands of the players. The aims of this study were to analyze the postural demands of professional soccer players by playing position. A longitudinal study for 13 consecutive microcycles, whi...

The rapid growth of wearable sensors has allowed the analysis of trunk kinematics during the match, which is necessary for having a better understanding of the postural demands of soccer players. However, some contextual variables may have an impact on the physical demands of the players. This study aimed to analyze the effect of three contextual v...

The bench press exercise is one of the most used for training and for evaluating upper-body strength. The aim of the current study was to evaluate the electromyographic (EMG) activity levels of the pectoralis major (PM) in its three portions (upper portion, PMUP, middle portion, PMMP, and lower portion, PMLP), the anterior deltoid (AD), and the tri...

The study aims were to describe positional differences in the acceleration and sprint profiles of professional football players in match-play, and analyse start speeds required based on the intensity of accelerations and decelerations. This longitudinal study was conducted over thirteen competitive microcycles in a professional football team from L...

The study aimed to compare the physical demands required during the first, second, and third most demanding passages (MDP) of play considering the effect of playing position, type of passage, and passage duration. A longitudinal study for three mesocycles was conducted in a professional soccer team competing in LaLiga123. Tracking systems collected...

The aim of this study was to analyze the literature on muscle activation measured by surface electromyography (sEMG) of the muscles recruited when performing the leg press exercise and its variants. The Preferred Reporting Items of Systematic Reviews and Meta-Analyses (PRISMA) guidelines were followed to report this review. The search was carried o...

The aim of this study was to systematically review the current literature on the electromyographic (EMG) activity of six core muscles (the rectus abdominis, the internal and external oblique, the transversus abdominis, the lumbar multifidus, and the erector spinae) during core physical fitness exercises in healthy adults. A systematic review of the...

Physical activity on children has been decreased on the recent years, promoted by the emergent sedentary lifestyle. Thus, obesity and health related issues are increasing amongst children population. Autonomous motivational climate and non-structured outdoor activities have been proved as appropriate strategies to promote physical activity amongst...

El objetivo de este estudio fue analizar la precisión de un dispositivo GPS para calcular la distancia de carrera al aire libre. Un deportista participó voluntariamente en un estudio de cohortes durante diez semanas. Se realizaron tres pruebas cada semana. Cada prueba se realizó después de dos días de descanso y consistió en ejecutar un recorrido t...

To understand the physical demands of sexual intercourse, it is necessary to monitor the kinematic parameters of this activity using relatively non-invasive technology. The aims of this study are to analyze the validity and reliability of an inertial device for monitoring the range of motion at the pelvis during simulated intercourse and compare th...

The Monopodal Squat, Forward Lunge and Lateral Step-Up exercises are commonly performed with one's own body weight for rehabilitation purposes. However, muscle activity evaluated using surface electromyography has never been analyzed among these three exercises. Therefore, the objectives of the present study were to evaluate the amplitude of the EM...

The main purpose of this review was to systematically analyze the literature concerning studies which have investigated muscle activation when performing the Deadlift exercise and its variants. This study was conducted according to the Preferred Reporting Items for Systematic Reviews and Meta-Analysis Statement (PRISMA). Original studies from incep...

A decrease in ankle dorsiflexion causes changes in biomechanics, and different instruments have been used for ankle dorsiflexion testing under static conditions. Consequently, the industry of inertial sensors has developed easy-to-use devices, which measure dynamic ankle dorsiflexion and provide additional parameters such as velocity, acceleration,...

The aim of this study was to describe the performance in a live heart rate monitoring physical education class using WIMU Fit.

To date, this App has been used mainly within sport environments. There is a lack of literature attending the use of this App in the context of teaching and learning processes in concern of basic motor skills and sports gesture pattern acquisition. Thereby, the main aim of this study was to propose a novel and alternative resource for youth motor s...

In strength or resistance training, the patterns of movement of the load and the muscle activation can be adapted to the training objective according to the muscle conditioning machine selected. Traditionally, free-weight bench press is extensively used for athlete training. One of the main features of such kind of machine is the significant influe...

The main aim was to compare electromyographic activity (EMG) of 6 thigh muscles while performing the forward lunge exercise between men and women. Vastus lateralis and vastus medialis of quadriceps femoris showed significantly greater electrical activity (p < 0.05) than the rest of muscles tested for both gender groups. Muscle activity pattern appe...

The main aim was to compare electromyographic activity of 6 thigh muscles while performing the unilateral squat exercise between men and women. Results showed a similar muscle activation pattern for the unilateral squat exercise between gender groups. Vastus lateralis and vastus medialis of quadriceps muscles showed significantly greater muscle act...

The main aim was to compare electromyographic activity of 6 thigh muscles while performing the lateral step-up exercise between men and women. Vastus lateralis and vastus medialis of quadriceps femoris showed significantly the greatest muscle activity (p < 0.05) in comparison to the rest of evaluated muscles for both gender groups. Aversely, biceps...

El objetivo del presente estudio fue analizar la excitación neuromuscular de 6 músculos del muslo durante el ejercicio step-up lateral en mujeres jóvenes entrenadas. El ejercicio step up lateral puede ser una alternativa adecuada a incluir en un programa de entrenamiento orientado al fortalecimiento del tren inferior en mujeres jóvenes entrenadas,...

El objetivo del presente estudio fue analizar la excitación neuromuscular de 6 músculos del muslo durante el ejercicio squat unilateral en mujeres jóvenes entrenadas. El ejercicio squat unilateral, debido a su elevada excitación neuromuscular, puede considerarse como una buena alternativa en la programación de ejercicios para el acondicionamiento m...

The present study aimed to evaluate and compare the levels of electromyographic activation in the pectoralis major, anterior deltoid, triceps brachii, forearm, rectus abdominis, external oblique, and rectus femoris muscles during a horizontal bench press in two situations: 1) with the feet on the ground; and 2) with active hip flexion and 90° of kn...

Introduction: There are certain anthropometric attributes common to most high-level paddlers and among the determinants for optimal performance consecution in senior categories. Objective: the present investigation aimed to determine the evolution of morphological characteristics of elite paddlers during adolescence and to compare them with the val...

El ejercicio de lunge frontal es comúnmente realizado como ejercicio de acondicionamiento muscular de los miembros inferiores al realizarse de manera dinámica y tener transferencia positiva hacia el gesto técnico de la marcha y/o la carrera. El objetivo del presente estudio fue evaluar el porcentaje de activación de los músculos: glúteo mayor y med...

La realización del ejercicio de press de banca (benchpress) es muy común en el entrenamiento deportivo para mejorar los niveles de fuerza de la musculatura de los miembros superiores. Una de las variantes de este ejercicio es su realización en una máquina sentado, la cual dispone de dos tipos de agarres (prono y pronosupino). El objetivo del presen...

This study investigates the relationship of trunk rotational velocity with mobility and curvature of the spine in wheelchair table tennis players. Eleven para table tennis players and 13 able-bodied athletes performed 5 seated trunk rotations to each side with 1 kg barbell placed on the shoulders. Trunk rotational velocity and respective angular di...

El objetivo del presente estudio fue analizar la adhesión a la dieta mediterránea y su relación con las variables antropométricas en piragüistas cadetes de élite. Para ello, 110 piragüistas varones de categoría cadete (media de edad: 15,51 ±0,66 años y IMC medio: 22,66 ± 2,03 kg·m-2) fueron valorados antropométricamente siguiendo las indicaciones d...

Introduction We describe a new nerve conduction study technique with reference values for the three branches of the supraclavicular nerve (SCN) in young healthy subjects and application of it in two patients. Methods The recording electrode was placed at the posterior border of the sternocleidomastoid muscle, 6–7 cm from the sternoclavicular joint...

Introduction: We describe a new nerve conduction study technique with reference values for the three branches of the supraclavicular nerve (SCN) in young healthy subjects and application of it in two patients. Methods: The recording electrode was placed on the posterior border of the sternocleidomastoid muscle, 6-7 cm from the sternoclavicular j...

Traditionally, physical and anthropometrical profiles of the most successful kayak athletes have been identified in male kayakers. This study attempted to identify the differences in morphology and fitness level of two performance-based groups of young elite female paddlers. Eighty-six female kayakers, aged 13.62 ± 0.57 years (mean ± SD) were alloc...

Este estudio tuvo como objetivo analizar la repercusión de un programa de actividad física en la salud calidad de vida en trabajadores de una cooperativa de frutas y hortalizas en Andalucía, España. Un total de 129 trabajadores, la mayoría de ellos mujeres (94.6%) de mediana edad (39,7 ± 10,5 años), participaron voluntariamente en el estudio. Se di...

Objective: To evaluate the test-retest reliability and validity of the MOCAP system for measuring spinal sagittal thoracic and lumbar curvatures and sacral inclination in a standing posture. Methods: Twenty-five male adults were evaluated on lateral standing radiographs. The thoracic and lumbar curvatures were calculated by Harrison's posterior...

This study had two main goals. The first was to determine the reliability of the Wimu® system (accelerometer) for mean velocity measurements during resistance exercises at 40% and 80% 1 repetition maximum (1RM). The second was to compare the results for the Wimu system to a linear encoder (gold standard) for mean velocity measurements when clipped...

Objective: To evaluate the test-retest reliability and validity of the MOCAP system for measuring spinal sagittal thoracic and lumbar curvatures and sacral inclination in a standing posture. Methods: Twenty-five male adults were evaluated on lateral standing radiographs. The thoracic and lumbar curvatures were calculated by Harrison's posterior...

The aims of the current study were 1) to evaluate the validity of the WIMU® system for measuring hamstring muscle extensibility in the passive straight leg raise (PSLR) test using an inclinometer for the criterion and 2) to determine the test-retest reliability of the WIMU® system to measure hamstring muscle extensibility during the PSLR test. 55 s...

The aim of this study was to determine the anthropometric and physical characteristics of youth elite paddlers and to identify the differences between kayakers and canoeists. A total of 171 male paddlers (eighty-nine kayakers and eighty-two canoeists), aged 13.69 ± 0.57 years (mean ± SD) volunteered to participate in this study. The participants co...

BACKGROUND: Systematic repetition postures adopted during trainings could generate alterations in the sagittal spinal curvatures. OBJECTIVE: The purposes were: 1) to analyse the sagittal spinal curvatures and pelvic tilt in Latin American style dancers; 2) to compare the spinal sagittal mobility and hamstring muscle extensibility between Latin Am...

The aim of this study was to compare the thoracic and lumbar curvatures and pelvic tilt in relaxed standing and maximal trunk flexion among highlytrained young athletes from three different sports disciplines. Thirty-two male canoeists, 30 male kayakers and 24 male tennis players were recruited for the study. The Spinal Mouse® system was used to me...