Jose Elvira

• Miguel Hernández University of Elche

Bridges and bird-dog exercises are commonly used in general training, as well as in warm-up and cool-down routines for young athletes to boost performance and prevent injuries. They are frequently paired with limb and other trunk exercises, and performed without precise control over intensity, which hinders the understanding of their actual impact....

Background: The scientific literature about the effect of a football match on leg force production is scarce, particularly for competitive matches in female football players. This investigation aimed to assess the acute effect of a competitive football match on the quadriceps and hamstrings’ rate of force development (RFD) and isometric peak force...

Bicycle set-up dimensions and cycling kinematic data are important components of bicycle fitting and cyclist testing protocols. However, there are no guidelines on how bicycles should be measured and how kinematic data should be collected to increase the reliability of outcomes. This article proposes a consensus regarding bicycle set-up dimensions...

Miralles-Iborra, A, Del Coso, J, De Los Ríos-Calonge, J, Elvira, JLL, Barbado, D, Urban, T, and Moreno-Pérez, V. Deceleration capacity during directional change as a time-efficient (ecological) prescreening of hip adductor force status in amateur soccer players. J Strength Cond Res XX(X): 000-000, 2024-Reduced isometric adductor muscle strength has...

Objectives Determine if (a) a better trunk stability and endurance are associated with an improved whole‐body dynamic balance, and if (b) the assessment tests can be interchanged within each capability. Methods Sixty‐three physically active young males performed three trunk stability (i.e., the lumbopelvic stability, the unstable sitting and the s...

Bike fitting aims to optimize riders’ positions to improve their performance and reduce the risk of injury. To calculate joint angles, the location of the joint centers of the lower limbs needs to be identified. However, one of the greatest difficulties is the location of the hip joint center due to the frequent occlusion of the anterior superior i...

This study aimed to assess the acute effect of a competitive football match on jump performance and kinematic parameters during jump landing in semiprofessional female football players. Twenty‐two semiprofessional players (20 ± 3 years) underwent a drop jump task for a posterior video analysis of the landing phase. These measurements were obtained...

Objectives: The purpose of this study was 1) to determine and compare kinetic parameters during the realization of a countermovement jump (CMJ) between footballers with cerebral palsy (CP) and non-impaired footballers, and 2) to analyze the differences in this action between different players’ impairment profiles and a group of non-impaired footbal...

Featured Application Knee injuries, such as an anterior cruciate ligament tear, may occur when there are deficits in the hamstring and quadriceps strength as the force production of these muscles is key to maintaining dynamic knee stability during athletic manoeuvres. The current study presents a field-based test with acceptable day-to-day reliabil...

The present study presents a novel specific multi-joint isometric test to assess upper limb strength impairment for evidence-based classification in wheelchair sports. Sixteen wheelchair athletes participated in this study and were classified according to their type of physical impairment and health condition as follows: athletes with neurological...

El objetivo de este estudio fue analizar la relación entre la producción de potencia en ciclismo, y variables analíticas de core, como la fuerza, la estabilidad y la cinemática durante el pedaleo. En este estudio participaron 30 ciclistas de tres disciplinas, los cuales realizaron un test de estabilidad sedente, un test de fuerza de extensores y fl...

Three-dimensional (3D) motion capture systems have been used to identify athletes in high risk of injury, but due to their cost, lack of portability and qualified technicians, an alternative is needed, such as two-dimensional (2D) systems. The purpose of this study was to examine the criterion-related validity of three measures of frontal plane kne...

Advances in technology provide an opportunity to enhance the accuracy of gait and balance assessment, improving the diagnosis and rehabilitation processes for people with acute or chronic health conditions. This study investigated the validity and reliability of a smartphone-based application to measure postural stability and spatiotemporal aspects...

Background Different eccentric strength assessments are used to identifying the risk of hamstring injury in athletes. However, there is scarce information to determine the association between Nordic-based measurements and the gold standard measurement of eccentric hamstring strength in an isokinetic dynamometer. Objective To investigate the relati...

Kinematic analysis of the cycling position is a determining factor in injury prevention and optimal performance. Fatigue caused by high volume training can alter the kinematics of the lower body and spinal structures, thus increasing the risk of chronic injury. However, very few studies have established relationships between fatigue and postural ch...

The aim of this systematic review is to analyze how, after additional trunk-focused training programs (ATEP), motor recovery after a stroke is modulated by potential effect modifiers. Twenty randomized controlled studies that carried out ATEP were included. Results showed moderate-to-high effects in favor of ATEP for trunk function, balance ability...

BACKGROUND Sprinting at the start of a BMX race is considered one of the most important determinants of performance. Therefore, different devices and technologies have been developed to improve this ability to sprint, such as non-circular CR (CR) systems. OBJECTIVE To compare new pedalling performance determinants for the first meters of the accel...

The main purpose of this study was to conduct a systematic review and meta-analysis quantifying the incidence of injuries in futsal players. A systematic search was conducted using MEDLINE, PubMed, Web of Science and Scopus databases and subsequently six studies (14 cohorts) were selected. Two reviewers independently extracted data and assessed tri...

Accelerometers are becoming popular in sport performance, as they are easy to wear, affordable, and usable in the field. Eccentric chainrings have been commercialised to improve pedalling performance, but little is known about their possible effects in the first pedal strokes (PS) of maximal sprint starts. To analyse the effects of the Q-Ring chain...

The main purpose of the current study was to analyze the injury incidence, characteristics and burden among sub-elite female futsal players. Individual exposure to match play and training, injury incidence and characteristics (player position, injury mechanism, type of injuries, severity of injuries, recurrent vs. new injuries, season variation of...

Vertical jump is a relevant variable in the classification of football for individuals with cerebral palsy. In this regard, the literature is limited. There are no studies assessing vertical jumping ability through kinematic methods and in more specific football game situations, such as jumps with a header. The goals of the present study were to as...

Purpose The purpose of this study was to analyse the relationship between several parameters of neuromuscular performance with dynamic postural control using a Bayesian Network Classifiers (BN) based analysis. Methods The y-balance test (measure of dynamic postural control), isokinetic (concentric and eccentric) knee flexion and extension strength...

The purpose of this study was to examine the validity of a highly popular pedometer application (Samsung Health). Sixteen adults (28.8 ± 8.9 years of age) wore two Samsung smartphone models, Samsung Galaxy Core Prime (SGCP) and Samsung Galaxy S4 (SGS4), at three body locations (waist, arm, and hand) while walking and running over a 50-m test. All t...

Objective To analyze the training effects of the FIFA 11+ kids on several parameters of physical performance in male youth football players.Materials and methodsTwenty-three youth players were randomized within each team into two groups (control vs. intervention). The intervention group performed the FIFA 11+ kids programme 2 times a week for 4 wee...

Background: Glenohumeral internal rotation deficit and external rotation strength have been associated with the development of shoulder pain in overhead athletes. Objective: To examine the bilateral passive shoulder rotational range of motion (ROM), the isometric rotational strength and unilateral serve speed in elite tennis players with and wit...

Background: Despite the high groin-injury (GI) prevalence in tennis, no studies have assessed the extent to which intrinsic groin injury risk factors, such as hip muscle strength, have recovered in elite tennis players with a history of previous GI. Objective: To investigate whether elite tennis players with a history of GI show differences in h...

La elección del calzado infantil durante el desarrollo del niño/a puede ser determinante en la aparición o prevención de problemas asociados con el pie por las diferentes características intrínsecas de los niños. Por ello, el objetivo del presente trabajo fue evaluar los movimientos del pie durante el apoyo en marcha y carrera con y sin calzado. Pa...

a elección del calzado infantil durante el desarrollo del niño/a puede ser determinante en la aparición o prevención de problemas asociados con el pie por las diferentes características intrínsecas de los niños. Por ello, el objetivo del presente trabajo fue evaluar los movimientos del pie durante el apoyo en marcha y carrera con y sin calzado. Par...

ABSTRACT Introduction: Ankle sprains are injuries that commonly occur during physical activity. They constitute between 15-75% of all sport injuries, and they can develop into chronic ankle instability (CAI) and functional disability. Subjects with CAI have exhibited diminished dynamic balance and weakness in the hip abductor muscles. Therefore, th...

Trunk/core stability is considered a key component of training programs, because it could contribute to prevention of low-back and lower-limb injuries and to sports performance. Based on the specificity principle, sports-related trunk stability tests would be required in elite sports performance. However, there may be some generic qualities underly...

Un adecuado control postural es considerado fundamental para la realización de muchas actividades de la vida diaria, especialmente en la población femenina ya que es más susceptible de padecer enfermedades degenerativas, como la osteoporosis, que pueden afectar al control postural. La estabilidad y la fuerza del tronco son factores que podrían tene...

Los problemas en el control del equilibrio corporal incrementan de manera importante la probabilidad de caídas en las personas mayores. Diversos autores sugieren que el desarrollo de la capacidad de estabilización del tronco y de la fuerza de la musculatura de la cadera podrían ayudar a mejorar el equilibrio corporal. No obstante, existen pocas evi...

Background & Study Aim: As any martial art, taekwondo can be classified as a specialty that requires high technical skills, such as a fine motor control both in static and dynamic conditions. Practitioners predominantly use kicks with high amplitude in both combat and technique (poomse) modalities. The aim of this study was the knowledge about trun...

El objetivo de este trabajo fue revisar las características de los métodos utilizados para valorar la estabilidad de la zona central del cuerpo (core stability), así como las características más importantes de los programas de ejercicios de estabilización del tronco. Los resultados de la revisión indican que métodos biomecánicos, como la aplicación...

The aim of this study was to review both the characteristics of the tests used to assess core stability and the most important features of trunk stabilization exercise programs. The results of this review suggest that biomechanical methods such as sudden and controlled trunk loading and unloading, unstable sitting paradigm and mathematical modeling...

In this work we present a scientific literature review on core stability with the aim of clarifying the meaning of this concept and its relation with sport performance and injury. The results of this review show that the use of the term core stability is ambiguous, as there is a great terminological confusion in both scientific literature and profe...

Trunk exercise speed has significant effects on neuro-mechanical demands; however, the influence of a variety of exercise speeds on motor control of the trunk displacement remains unknown. The aim of this study was to assess the effect of performance speed on trunk motion control during the curl-up exercise by analyzing the kinematic variance about...

Resisted sprint training is believed to increase strength specific to sprinting. Therefore, the knowledge of force output in these tasks is essential. The aim of this study was to analyze the effect of sled towing (10%, 15% and 20% of body mass (Bm)) on sprint performance and force production during the acceleration phase. Twenty-three young experi...

One of the most frequently used methods for training the sprint-specific strength is the sled towing. To date, no studies have been conducted to explore the effects of this method after a training period in well-trained athletes. The purpose of this study was to determine the effects of 4 weeks of resisted sprint training with sled towing. Twenty-t...

Judokas commonly train the seoi-otoshi technique (aka, drop-knee seoi-nage). A controversy exists about the convenience of its use by the younger judokas due to the risk of high loads produced by the impacts on their growing structures. The aim of the present paper was to measure the impacts against the tatami when executing the knee seoi-otoshi te...

Análisis biomecánico de la foto secuencia del record de España junior de salto de altura (2.27m) de Miguel Ángel Sancho [Biomechanical analysis and photo-sequence of under-18 Spanish record of high jump (2.27m) - Miguel Ángel Sancho]

The aim of this study was to analyze the trunk muscle coactivation during spine stabilization exercises. The electromyography of rectus abdominis, external and internal oblique and erector spinae was recorded while performing the back bridge, the front bridge and the right and left side bridge exercises. The muscular activation levels needed to sta...

Abstract The influence of speed on trunk exercise technique is poorly understood. The aim of this study was to analyse the effect of movement speed on the kinematics and kinetics of curl-up, sit-up and leg raising/lowering exercises. Seventeen healthy, recreationally trained individuals (13 females and 4 males) volunteered to participate in this st...

Objective: To analyze within subject differences in ground reaction forces. The tests were carried out by comparing the ankle with a previous lateral ligament injury (with permanent ligament loosening) and the one without ligament loosening. Material and methods: Eighteen volunteers were recruited for the study (8 women and 10 men), all of them phy...

RESUMEN Si bien el paradigma del asiento inestable ha sido utilizado con éxito para valorar la estabilidad del tronco en poblaciones patológicas, éste no ha sido utilizado para estudiar la influencia de la práctica deportiva sobre la estabilización activa del tronco (EAT). El objetivo del estudio fue analizar el efecto de la especialización deporti...

The objective was to determine the biomechanical parameters of the high jump where differences occur between female and male jumpers in different age categories. The analysed sample consisted of 69 elite jumpers: 37 men (13-15 years, n = 11, 17-18 years, n = 13, and 18-34 years, n = 13) and 32 women (13-14 years, n = 11, 17-18 years, n = 9, and 15-...

L’objectiu va ser determinar els parametres biomecanics del salt d’alcada en que es produeixen diferencies entre saltadors i saltadores en diferents categories d’edat. La mostra analitzada va estar formada per 69 saltadors d’elit, 37 homes (13-15 anys, n = 11; 17-18 anys, n = 13, i 18-34 anys, n = 13) i 32 dones (13-14 anys, n = 11; 17-18 anys, n =...

The high jump is a sport movement with high technical complexity. The purpose of the high jump is to pass-over a bar located at a variable height using a single support take-off. Understanding the causes and effects of the different movements and positions is an essential piece to improve performance. This paper reviews the mechanical principles in...

El objetivo de este estudio fue fijar las variables biomecánicas que más correlacionan con el rendimiento del salto de altura en función del grupo de edad. Se analizó el mejor salto de las finalistas en el campeonato nacional: 11 saltadoras de categoría cadete, nueve de categoría junior, y 12 de categoría senior. Se calcularon 25 variables de cada...

The purpose of this study was to establish reference values for various kinematic variables in high jump that allow us to determine an execution model of Spanish athletes and compare it with the technical model proposed in the bibliography. The best jump of the first 25 finalists in the 2009 Spanish indoor championship were analyzed (13 males: heig...

El presente trabajo describe la ejecución de la prueba atlética de lanzamiento de disco, desde un punto de vista cualitativo, explicando las leyes biomecánicas que afectan sobre el movimiento el disco en la fase de vuelo. El documento busca incrementar la información sobre la prueba y la comprensión del porqué de los diferentes aspectos que afecta...

El presente trabajo revisa los aspectos teóricos y las consideraciones metodológicas a tener en cuenta cuando se realiza un análisis del movimiento en el ámbito deportivo mediante fotogrametría tridimensional. Las consideraciones abordadas se agrupan en: 1) sistema de registro, 2) características de las cámaras, 3) número y ubicación de las cámaras...

El presente trabajo describe la ejecución de la prueba atlética de lanzamiento de disco, desde un punto de vista cualitativo, explicando las leyes biomecánicas que afectan sobre el movimiento del sistema lanzador-disco. El documento busca incrementar la información sobre la prueba y la comprensión del porqué de los diferentes movimientos que realiz...

Performing sprints on a sand surface is a common training method for improving sprint-specific strength. For maximum specificity of training the athlete’s movement patterns during the training exercise should closely resemble those used when performing the sport. The aim of this study was to compare the kinematics of sprinting at maximum velocity o...

The aim of the study was to analyse the differences in critical features of high jump take-off in different ages. 3D photogrammetry was used to analyse the best jump of the participants of 3 Spanish Indoor Championships (2009) (13-15 y, 17-18 y, and 18-34 y). The variables measured were horizontal velocity of the centre of mass (CM) at touchdown (V...

The aim of the study was to analyse the differences in critical features of high jump take-off in different ages. 3D photogrammetry was used to analyse the best jump of the participants of 3 Spanish Indoor Championships (2009) (13-15 y, 17-18 y, and 18-34 y). The variables measured were horizontal velocity of the centre of mass (CM) at touchdown (V...

p class="resumenyabstract" align="justify">The aims were to describe the behavior of the subtalar joint and foot in the race walk, and seek for correlations between them and the footprint. 12 race walkers participated in the study. The arch index was calculated on their footprints. Plantar pressures were measured and 3D photogrammetry used on a sin...

Objective The purpose of this study was to analyse within subject differences in a number of static balance tests, performed during monopodal stance.Material and methodsThe tests were carried out comparing the ankle with a previous lateral ligament injury (with permanent ligament loosening) and the one without ligament loosening. Fourteen volunteer...

There are different training methods for improving sprint performance, and resisted sprint training methods are one of the most popular. Sprint resisted methods are characterized by executing sprints with an added load. The direction of the resistance applied to the athlete is different for each device, and so each device has different effects on t...

The present study aimed 1) to investigate the gender differences in jump performance and muscle architecture between men and women; and 2) to determine whether the differences in jump performance could be attributed to gender differences in the muscle architecture of the leg extensor muscles. Sixty-two subjects volunteered for the study (34 women a...

An excessive load in resisted sprint training can produce changes in running patterns. Therefore, load control is essential to ensure the specificity of these training methods. The most common way to control it is through the percentage of velocity lost in relation to maximum velocity. The present paper describes a study that aimed to establish the...

The success in many actions in team sports is determined by the player’s ability to develop high speed and acceleration. There are many resisted methods for training the strength within the specific running technique, each one with different application according to the characteristics of the overload. Uphill sprinting is one of these methods. A cr...

Resisted sprint running is a common training method for improving sprint-specific strength. For maximum specificity of training, the athlete's movement patterns during the training exercise should closely resemble those used when performing the sport. The purpose of this study was to compare the kinematics of sprinting at maximum velocity to the ki...

Although exercise speed is an acute variable to prescribe abdominal strengthening programs, current literature lacks studies analyzing the influence of speed on muscular activation in abdominal exercises. The aim of this work was to determine the influence of trunk curl-up speed on the amplitude of muscular activation and the way in which the trunk...

The aim of the paper was to analyze the relationship between footprint arch index and subtalar joint movement in race walkers. Thirteen young, highly skilled race walkers volunteered to participate. We obtained dominant-foot footprints in a bipedal stance. The arch index was measured to classify arch height. We also conducted a photogrammetric vide...

This study aimed to test the effectiveness of ankle taping on the limitation of forced supination during a change of direction, as well as the losses of effectiveness after a 30-minute training session. Fifteen young men with no ankle injury volunteered for the study. The static and dynamic ranges of movement (ROM) were measured before and after a...

The aims were to describe the behavior of the subtalar joint and foot in the race walk, and seek for correlations between them and the footprint. 12 race walkers participated in the study. The arch index was calculated on their footprints. Plantar pressures were measured and 3D photogrammetry used on a single support while they race walked at their...

Much discussion exists about which is the most effective technique to improve spine stability. The purpose of this study was to evaluate the effectiveness of abdominal bracing and abdominal hollowing maneuvers to control spine motion and stability against rapid perturbations. Eleven healthy males were posteriorly loaded in different experimental co...

Tecnologías aplicadas a la evaluación táctica de los deportes. IV.1 Concepto de táctica. IV.2 Problemática en los procesos de evaluación táctica. IV.3 Perspecticvas en el análisis de la competición en deportes colectivos.-V. Análisis del comportamiento visual aplicado al deporte. V.1 Sistemas de seguimiento de la mirada. V.2 Ejemplos de trabajos de...

The purpose of this paper was to determine the effect of the race walking exercise on the structures of the foot, so much in the immediate responses to the practice as in the long term training adaptations. Footprints were recorded tree times using the photopodogram methodology on a sample of 17 young race walkers. The first one and second footprin...

El propósito de este trabajo fue determinar el efecto que tiene la práctica de la marcha atlética sobre las estructuras del pie, tanto en las respuestas inmediatas a la práctica como en las adaptaciones a largo plazo por el entrenamiento. Para ello se realizaron tres tomas de la huella plantar por el método el fotopodograma a una muestra de 17 marc...

RESUMEN El objetivo de este estudio fue determinar la eficacia de cuatro juegos motores ("el túnel", "la pelea de gallinas", "el tentetieso" y "la carretilla") para el fortalecimiento de los músculos del abdomen. Para ello, se registró la electromiografía de los músculos rectus (RA), obliquus externus (OE) y obliquus internus abdominis (OI) de 12 v...

Feints are associated with ankle sprains mechanism of injury. The effectiveness of preventive ankle taping in the limitation of ankle supination and extension during a feint and the degree of loss of restriction after 30 minutes training was analysed. The results of passive measures were compared with dynamic ones during a feint, using 3D digital v...

This paper describes biomechanical analysis of 11 valid throws of the Spanish record-breaker Manuel Martínez in 3 Spanish Championships from 1996 to 1998. The aim of these studies was to describe the individual technique as much as identify the cinematic variables that more correlated with the distance of throw. Possible technique improvements are...

There is a lack of experimental biomechanical studies on wrestling sports. This lack is more evident in kinematics due to the difficulty of the digitising process, since a great number of hidden points are created. In this paper a method is shown the aim of which is to analyse 'breaking-in' techniques in any wrestling sport. This method is implemen...

The standing long jump (SLJ) is often used to test the explosive force of the lower extremities. Compared to other tests such as the counter- movement and squat jumps, the good reproducibility and validity of the standing long jump have been assessed in some studies. In spite of all, several authors criticise it (SLJ) because of its high technical...

An aspect frequently studied in Biomechanics is the performance of the shot-putters' lower extremities. On performing the put, two tendencies were defined in the linear technique, the 'short-long' and the 'long-short' executions. They were described according to the value of the distance covered by the right foot in its initial stage of the flight,...

The special strength training in each sporting activity implies the undertaking of the exercises which follow the structure of the physical movement in an athletic competition. A shot put cinematic study was carried out in a real situation with 3D video technique. The movement of the throwing arm and forearm as well as the line of the shoulders and...