
Francisco Javier NuñezPablo de Olavide University | UPO · Department of Sports and Computer Sciences
Francisco Javier Nuñez
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Publications (78)
Soccer is a team sport in which players expend high-intensity intermittent efforts that require the production of sprints, accelerations, decelerations, changes of direction, and jumps. The aim of this study was to analyze the effects of training with portable and low-cost flywheel devices, using multi-directional exercises over 8 weeks, on the per...
Team sports are demanding, making the constant monitoring of internal and external load crucial for comprehensive development. The relationship between load and injury has been widely studied with the aim of preventing injuries and improving athlete performance. Sports institutions and coaches should focus on the implementation of Decision Support...
This study aimed to compare the effects of an accentuated eccentric training programme on physical performance between men and women. Distributed in two groups by gender, 21 male and 21 female athletes performed four sets of seven repetitions of the half-squat exercise twice per week for 6 weeks. Both groups lifted the same absolute load using a ro...
El objetivo de esta tesis doctoral fue registrar, analizar y cuantificar, por primera vez, el perfil CT y CF mediante tecnología IMU en jugadores profesionales de fútbol durante partidos.
La investigación está basada en un diseño observacional del análisis de la CT y CF
durante partidos de un equipo profesional de fútbol. Un total de 18 futbolistas...
The purpose of this study was to investigate the effects of light and heavy loads in the squat exercise on kinematics and mechanical variables in recreationally trained men and women. Twenty-two men and sixteen women were assigned to 4 groups: 40% and 80% one-repetition maximum (1RM) male (M40 and M80) and female (F40 and F80). Over 6 weeks, partic...
This study aimed to record, analyze and quantify professional soccer players’ technical (TL) and physical load (PL) in friendly matches to compare their records during the first and second halves and between players with different positions. Eighteen professional soccer players, 24.6 ± 2.7 years, 1.78 ± 0.3 height (m), 74.6 ± 4.5 body mass (kg), 9....
The purpose of this study was to compare the fascicle length, angle pennation and mechanical properties of the biceps femoris long head (BFlh) in dominant and non-dominant limbs in previously injured and uninjured professional football players. Fifteen professional football players were recruited to participate in this study. Seven players had suff...
Objective:
The aim of the present study was to compare the fascicle length, pennation angle, muscle thickness and stiffness of the biceps femoris long head, and eccentric hamstring strength between injured dominant limbs, injured non-dominant limbs, uninjured dominant limbs and uninjured non-dominant legs in previously injured players, and between...
Traditionally, strength coaches prescribed resistance training based on constant and concentrically oriented goals. However, most movements in the field require players to produce forces in variable and unpredictable contexts, with an emphasis on the eccentric (ECC) component. If movement repetition varies during competition, it makes sense to cond...
Since most movements on the field require athletes to produce forces in variable and unpredictable contexts, the use of training programs based on identical repetitions of an exercise may not be optimal for movement transference. Therefore, the aim of this study was to analyse the effects of unexpected eccentric load variability during resistance t...
The presence of inter-limb asymmetries can influence strength performance and represent an injury risk factor for team sport athletes. The present study aimed to investigate the effects of changes in resistance loads using different assessment modalities on the magnitude and the direction of inter-limb asymmetry within the same leg. Fifteen young e...
Flywheel resistance training devices can be classified by their shaft shape. The objective of this study was to analyze whether using two flywheel resistance training devices shaft shapes can influence force and velocity production, regardless of the inertia used. Thirty-nine (n = 39) healthy active men participated in this study. They were randomi...
The aim was to determine if players with a prior hamstring strain injury (HSI) exhibit bilateral deficits in knee flexor eccentric strength and hamstring muscle volume and differences in sprinting performance compared with players without a history of HSIs. Forty-six male professional soccer players participated in this study. Eccentric knee flexor...
It is known that muscle fibres have a greater capacity to generate force during the eccentric phase of a movement compared with the concentric phase of the same movement. Thus, some authors argue that training protocols where exercise is overloaded during the eccentric phase of movement achieve greater strength gains than those in which the load is...
We outline a case of success in the rehabilitation of a Romanian first-division soccer player who sustained an anterior cruciate ligament (ACL) rupture with a meniscal tear during competition in the 2012–2013 season. The ligament was reconstructed with an autologous hamstrings graft and partial meniscectomy was performed. The player returned to sam...
Several studies have confirmed the efficacy of strength training to maximize soccer player performance during competition. The aim of this meta-analysis was to determine the effects of different strength training protocols on short-sprint and vertical jump performance of professional soccer players from the first division of their countries. The fo...
High intraset variability has been considered as a potential aid in the treatment of tendinopathy by producing forces in variable and unpredictable contexts that allow the athlete to return to sport pain free. The aim of this study was to compare the intraset variability in force profiles between different rotational inertia devices (RIDs) during c...
Background:
The purpose of the present study was to analyse the internal and external loads on regular and floater players during standardized small-sided games (SSGs) with different numbers of players (teams of 3, 5, or 7 players).
Methods:
Fifteen male semi-professional football players played different SSGs maintaining the same relative area...
It has been showed that previous experience in the use of rotational inertia devices (RIDs) enhances acute performance outcomes. The purpose of this study was to examine the differences in kinetic and kinematic profiles between athletes with and without experience in the use of different RIDs. Thirty-nine healthy men performed a half-squat incremen...
Objectives: This systematic review and meta-analysis aimed to analyze the technologies and main training variables used in the literature to monitor flywheel training devices in real-time. In addition, as the main research question, we investigated how eccentric overload can be effectively monitored in relation to the training variable, flywheel sh...
Most movements in the field require players to produce forces in variable and unpredictable contexts, with an emphasis on the eccentric (ECC) component . Biomechanical analyses of the production of athletic movements have indicated that even after thousands of repetitions, it is possible to see significant different levels of variability in the mov...
The aim of the current study was to analyze the possible differences between the use of different kinds of thresholds to assess high-intensity acceleration efforts, both in number and distance covered in young elite soccer players. A total of 26 young soccer players were analyzed during 18 competitive matches (n=108). High-intensity acceleration ef...
The primary aim of the present study was to analyze mechanical responses during inertial knee- and hip-dominant hamstring strengthening exercises (flywheel leg-curl and hip-extension in conic-pulley), and the secondary aim was to measure and compare regional muscle use using functional magnetic resonance imaging. Mean power, peak power, mean veloci...
Coaches at the professional level are often concerned about negative side effects from testing and intensive resistance training periods, and they are not willing to base their training prescriptions on data obtained from semiprofessional or amateur football players. Consequently, the purpose of this study was to analyze the reliability and effecti...
The purpose of the study was to examine the differences in bilateral deficit (BLD) at different loadings during the half-squat jump (SJ) and horizontal countermovement jump (HCMJ) to determine if there is a relationship with linear sprint or change of direction (COD). The second goal was to check if fast players were more powerful in SJ and HCMJ th...
The aims of this study were to compare the force profile of using a horizontal cylinder-shaped axis or a vertical cone-shaped axis to provide resistance in rotary inertia devices, and to report the evolution of kinetic and kinematic variables in experienced athletes during a half-squat exercise. Twenty-two healthy active men participated in the ass...
The aim of the study was to investigate the relationships between countermovement jump (CMJ) height and inertial power in squat and sprint variables with change of direction (COD) performance. Fifty young healthy active males participated in the study. To determine these relationships, we carried out a 10-m linear sprint test (T 10 m), vertical jum...
Muñoz-López, A, De Hoyo, M, Nuñez, FJ, and Sañudo, B. Using tensiomyography to assess changes in knee muscle contraction properties after concentric and eccentric fatiguing muscle actions. J Strength Cond Res XX(X): 000-000, 2020-The purposes of this study were to analyze the effects of different types of muscle contraction (concentric and eccentri...
The aim of this study was to determine the most effective anthropometric equations or bioelectrical impedance analysis (BIA) devices for quantifying the sensitivity to change in fat-free mass (FFM) in elite young soccer players, in comparison with measurements using dual-energy X-ray absorptiometry (DXA), between the pre- and mid-season. A total of...
The aim of this systematic review was to evaluate the current evidence by assessing the effectiveness of integrative neuromuscular training programs in injury prevention and sports performance in young athletes. Different data sources were analyzed up to January 2018. Eligible studies contained information on population (young athletes), interventi...
The aims of this study were to analyse the effect of chronic strength training over concentric power (CON), eccentric power (ECC), ECC/CON ratio, and 20 m linear sprint performance in elite young soccer players. Twenty young elite Spanish soccer players were assigned to an experimental group (CPG) which performed a front-step exercise using a conic...
Based on the high financial and logistical costs associated with the assessment of body composition with dual-energy X-ray absorptiometry (DXA), this study determined which field method has the best correlation with DXA data, and developed an equation to estimate fat-free mass (FFM) using the field anthropometric data in international soccer player...
El objetivo de este estudio fue describir los cambios en la composición corporal, la fuerza y el rendimiento de sprint en respuesta a toda una temporada competitiva de entrenamiento de fútbol complementada con 2 sesiones a la semana de entrenamiento con sobrecarga excéntrica inercial en jóvenes futbolistas profesionales masculinos. Se evaluó la com...
de Hoyo, M, Núñez, FJ, Sañudo, B, Gonzalo-Skok, O, Muñoz-López, A, Romero-Boza, S, Otero-Esquina, C, Sánchez, H, and Nimphius, S. Predicting loading intensity measuring velocity in barbell hip thrust exercise. J Strength Cond Res 35(8): 2075-2081, 2021-The barbell hip thrust is an increasingly used exercise to target the hip extensors. Direct and i...
The aim of the present study was to analyze the number and the % of maximum accelerations, and the distance covered among different soccer players' positions, classifying them with GPS technology according to an individual threshold based on the maximum acceleration capacity. 20 players were observed during four matches (n=80). All players undertoo...
Martínez-Cabrera, FI, Núñez-Sánchez, FJ, Losada, J, Otero-Esquina, C, Sánchez, H, and De Hoyo, M. Use of individual relative thresholds to assess acceleration in young soccer players according to initial speed. J Strength Cond Res XX(X): 000–000, 2018—The aims of the current study were (a) to analyze the characteristics of acceleration efforts usin...
The aim of this study was to describe the changes in body composition, strength and sprint performance in response to an entire competitive season of football training supplemented with 2 inertial eccentric-overload training sessions a week in young male professional soccer players. Whole body and regional composition (assessed using dual-energy X-...
The aim of the present study was to analyze the number and the % of maximum accelerations, and the distance covered among different soccer players’ positions, classifying them with GPS technology according to an individual threshold based on the maximum acceleration capacity. 20 players were observed during four matches (n=80). All players undertoo...
RESUMEN En la actualidad, las lesiones de rodilla continúan afectando a un gran porcentaje de la población deportiva, especialmente en deportes de equipo o multidireccionales. Aunque en los últimos años se están implementando programas de prevención como el FIFA 11+ con el objetivo de reducir la tasa lesional, las cifras permanecen siendo elevadas,...
Trabajo de TFM del Máster en Rendimiento Fïsico y Deportivo. Primer metaanálisis y mucho que mejorar.
Encontramos pocos artículos que realmente cuantifiquen el dolor y ofrezcan en la metodología la descripción de cómo se ha llevado a cabo el entrenamiento. Las únicas variables que resultan significativas en una mejora del dolor de rodilla tras la...
The study aimed to compare the chronic eccentric-overload training effects of unilateral (lateral lunge) vs bilateral (half-squat) using an inertial device, on hypertrophy and physical performance. Twenty-seven young team sports male players performed a 4 sets of 7 repetitions of inertial eccentric overload training, biweekly for 6 weeks, distribut...
The aim of the current research was to find out the differences that exist between the external load in high-velocity actions (SP+) in
competitions and in training sessions of professional soccer team. We took as SP+ indicators those actions that the soccer players performed over 23
km·h
-1
and could be held for at least 1 second. It was monitored...
Background:
The aim of the current study was to analyse the acceleration profile in elite professional soccer players according to their initial speed but also considering players' position.
Methods:
Players' accelerations profiles were analysed using a relative acceleration profile according to the initial speed (S1, from 0 to 7 km/h; S2, from...
The aim of the current research was to find out the differences that exist between the external load in high-velocity actions (SP+) in competitions and in training sessions of professional soccer team. We took as SP+ indicators those actions that the soccer players performed over 23 km·h-1 and could be held for at least 1 second. It was monitored 2...
Background:
Metabolic power and speed running are in the top-10-ranked variables used to quantify the physical demand in soccer matches or training practices. The purpose of this study were 1) to compare metabolic power (MP) and the traditional approach using speed running during soccer matches in absolute values and 2) in zones of intensity in fu...
Núñez Sanchez, FJ and Sáez de Villarreal, E. Does flywheel paradigm training improve muscle volume and force? A meta-analysis. J Strength Cond Res 31(11): 3177–3186, 2017—Sev-eral studies have confirmed the efficacy of flywheel paradigm training for improving or benefiting muscle volume and force. A meta-analysis of 13 studies with a total of 18 ef...
The aim of the study was to compare the relative running demands (m·min-1), among different soccer players positions, coded by an absolute threshold vs. an individualized threshold based on splits of 10% of peak velocity, during friendly games, with the same tactical system and monitoring with a GPS. To this end he had 20 players on a semiprofessio...
The aim of the study was to compare the relative running demands (ṁmin-1), among different soccer players positions, coded by an absolute threshold vs. an individualized threshold based on splits of 10% of peak velocity, during friendly games, with the same tactical system and monitoring with a GPS. To this end he had 20 players on a semiprofession...
BACKGROUND: Adductor Longus Enthesopathy-related Groin Pain (ALErGP) is the most common cause of groin pain in soccer players. The aim of this study was to evaluate the therapeutic utility of Intratissue Percutaneous Electrolysis (EPI®) technique in combination with an Active Physical Therapy (APT) program to treat ALErGP.
METHODS:Twenty-four non-p...
The aim of this study was to examine the kinematics and kinetics (force, velocity and acceleration) and blood lactate concentration of the Versapulley (VP) device in comparison with free weight (FW) exercise at a similar external load. Fifteen rugby players randomly performed two training sessions of 6 sets of 6 repetitions with 20 s of recovery in...
The aim of this study was to examine the kinematics and kinetics (force, velocity and acceleration) and blood lactate concentration of the Versapulley (VP) device in comparison with free weight (FW) exercise at a similar external load. Fifteen rugby players randomly performed two training sessions of 6 sets of 6 repetitions with 20 s of recovery in...
Tensiomyography (TMG) is a relatively new technique to assess the muscles mechanical properties in response to a single electrical stimulus. The purpose of the present study was to assess the acute effect of a foam roller (FR) in the rectus femoris muscle using TMG. Seventeen male professional soccer players (age 21.4 ± 3.8 years, height 180.5 ± 7....
Tensiomyography (TMG) is a relatively new technique to assess the muscles mechanical properties in response to a single electrical stimulus. The purpose of the present study was to assess the acute effect of a foam roller (FR) in the rectus femoris muscle using TMG. Seventeen male professional soccer players (age 21.4 ± 3.8 years, height 180.5 ± 7....
BACKGROUND: Rectus abdominis-related groin pain (RAGP) is one of the possible clinical patterns that determine pubalgia. RAGP is one of the typical patterns in footballers and is due to the degeneration and tendinopathy of the distal tendon at the level of the two pubic tubercles. Intratissue percutaneous electrolysis (EPI) is a novel technique use...
Purpose:
The objectives of this study were to describe the repeated high-intensity activity and internal training load of rugby sevens players during international matches and to compare the differences between the first and second halves.
Methods:
Twelve international-level male rugby sevens players were monitored during international competiti...
El objetivo de este estudio fue comparar las demandas físicas que exigen dos modalidades de juego distintas en fútbol a jugadores jóvenes (Fútbol 7 (F7) vs. Fútbol 11 (F11)). 26 sujetos de entre 12 y 15 años fueron valorados durante la primera parte de 8 partidos (4 de F7 y 4 de F11). Los datos se midieron con GPS de 1 Hz. Los principales resultado...
Examine the effect of repeated-sprint training vs. combined repeated-sprint and resistance training with superimposed vibrations on repeated-sprint ability (RSA) and lower body power output in male rugby players.
Players were divided into two training groups. One group performed repeated-sprint training (RST;n=10) two days a week and the other perf...
Purpose:
To examine the effects of several matches per day on running performance and cardiovascular stress in referees during a national Rugby Sevens championship.
Methods:
Seven referees, who refereed 3 matches/ day, were monitored by GPS during 21 matches.
Results:
Referees' movement patterns were relatively stable from the 1st to the 2nd m...
Cada partído de rugby sevens está controlado por un árbitro principal y sus asistentes, cuya función es encargarse de que el reglamento se cumpla durante el transcurso del mismo. La capacidad del árbitro para poder mantenerse en una posición cercana a la acción de juego durante el transcurso del patiido es de vital importancia de cara a las decisio...
Suarez-Arrones, LJ, Nuñez, FJ, Portillo, J, and Mendez-Villanueva, A. Running demands and heart rate responses in men rugby sevens. J Strength Cond Res 26(11): 3155-3159, 2012-The purpose of this study was to examine match running performance and exercise intensity in a Rugby Sevens (7s) team during competitive club-level matches. Time-motion analy...
The purpose of this study was to describe the match-play demands of professional female rugby players competing in Rugby Sevens (Rugby 7's) matches. Time-motion analyses (global position system) were performed on 12 elite female rugby players during 5 competitive matches in a 2-day international tournament. Data revealed that players covered an ave...
The effect of explicitly providing goalkeeper's movement advanced cue to the kicker during a real penalty kick task was assessed. 32 expert soccer players (M age= 23.2 yr.), who were divided into four groups: an experimental group, a discovery group, a placebo group, and a control group, participated. Rate of success in the task was assessed, as we...
This study analyse the influence of Knowledge of Results (KR) with different accuracy levels on the learning rate of a throwing skill of spatial non-vision accuracy, during the acquisition stage. We assessed the number of successful events, the distance from the target and the consistency of the responses obtained by 180 subjects. We applied three...
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El objetivo de nuestro estudio es comprobar la influencia de un programa de actividad física en la condición física de mujeres adultas (fuerza del tren superior e inferior, equilibrio estático, consumo máximo de oxígeno y la movilidad articular de tronco) y ver si el tipo de programa condiciona la mejora de las variables analizadas. La muestra...
The purpose of this work is to study the goalkeeper behavior and movement precue during the approaching race of the shooter to the ball, and compare professional (1ª y 2ª Division) and amateur (3ª Division) precue movement. Six professional goalkeepers (29.66+3.5 age) and 6 amateur goalkeepers (23.16+3.7 age) part in this study. The goalkeepers mov...
In the present study, effects of using precues of the goalkeeper's movements during a penalty kick on the penalty taker's response time and rate of success when selecting the points at which shots were taken were evaluated. 20 male players included 10 expert players (M=25.7 yr., SD=4.2 yr.) and 10 novices (M=22.1 yr., SD=2.5 yr.), whose response ti...
Tesis Univ. Granada. Departamento de Educación Física y Deportiva. Leída el 13 de julio de 2006
Este estudio tiene dos objetivos, por un lado ver como afectan diferentes variables a la
adherencia a los programas de actividad física en las escuelas deportivas y por otro
observar el papel que desempeñan las diferentes conductas del monitor respecto de la
adherencia de sus alumnos. El propósito final pero a n en fase experimental seria, por
un l...
El objetivo de este trabajo es estudiar las características sociodemográficas de la
población, de la zona norte de Granada, que realiza alún tipo de actividad física
dentro de las Escuelas deportivas de la FCCAFD de Granada. Hemos desarrollado un
diseño seccional descriptivo en el que hemos introducido como variables dependientes
las característica...
En la tarea de planificar un programa de actividad física se deben tener en cuenta estrategias para lograr la adherencia a dichos programas. Frecuentemente asociamos una mayor adherencia con una mayor rentabilidad económica.
Este estudio analiza las consecuencias de la aplicación de diferentes estrategias económicas para lograr la adherencia de los...
Desde hace ya algunos a os el movimiento Junior Empresa está floreciendo en nuestro país.
Como formula de iniciación a gestión empresarial lleva bastantes años en práctica, pero dentro del campo de la actividad física y del deporte es novedoso. SERVISPORT JUNIOR EMPRESA es la primera que se dedica a la gestión de actividades e instalaciones deporti...
Esta investigación analiza los efectos que ocasiona, sobre la percepción subjetiva del esfuerzo total, el retrasar su determinación en 0, 24 y 48 horas tras el término de la sesión de entrenamiento, en jugadores de categoría juvenil de fútbol, así como la aplicación de información específica de la misma en formato escrito durante 6 meses. Para la v...
The purpose of this work is to study the goalkeeper behavior and movement precue during the approaching race of the shooter to the ball, and compare professional (1ª y 2ª Division) and amateur (3ª Division) precue movement. Six professional goalkeepers (29.66+3.5 age) and 6 amateur goalkeepers (23.16+3.7 age) part in this study. The goalkeepers mov...
Número de publicación: 2 255 359 Número de solicitud: 200302040 Sistema de evaluación y entrenamiento de la decisión motora consistente en una unidad central de tratamiento de señales que soporta hasta 5 unidades periféricas detectoras, electrónico, inalámbrico, con autonomía en cada una de sus unidades proporcionada por batería de CC, teniendo la...