Mixed Methods in Tactical Analysis Through Polar Coordinates and Function Estimation: The Transition Play in ACB Basketball.

Nowadays, getting advantageous offensive situations in high-level basketball is being increasingly harder, so taking advantage of any situation in the game since the team has the ball is essential to be competitive. Therefore, the goal to achieve in this study is to evaluate using a mixed method strategy the behaviors happening in the application of the technical-tactical means performed in the transition play of professional basketball in Spain. An ad hoc observation tool made of 11 criteria and 83 exhaustive and mutually exclusive categories (E/ME) has been designed and validated by means of data quality and generalizability analyses. Indexes obtained show high reliability and validity allowing the proposed actions to be recorded (correlation coefficients are above 0.95 and generalizability coefficients are above 0.90 in all cases). A total number of 128 situations corresponding to eight games of Unicaja de Málaga in the Endesa League in the 18/19 season were observed with the Hoisan software. The analysis of the relationships among behaviors was performed using the polar coordinates technique where the one-on-one initiation, outside the zone, has been used as focal behavior. The estimation of the functions representing the vectors has also been performed to model the best fit that estimates, starting from a focal category, the relationship among this focal behavior and the rest of the mating behaviors for possible future observations. The results show significant relationships between the selected focal behavior and the mating behaviors, showing indications of behaviors allowing tactical interpretation of the game and the definition of intervention programs to improve the performance of the team.

Influencia del juego interior de la selección española de baloncesto en el rendimiento: análisis de coordenadas polares / Influência do jogo interno da selecção nacional de basquetebol espanhola no desempenho: análise das coordenadas polares / The influence of Spanish basketball team inside game in performance: polar coordinates analysis

En los últimos años se ha incrementado el interés por conocer las acciones más efectivas durante la competición ya que este hecho se ha mostrado esencial para mejorar el rendimiento de los jugadores en el deporte de élite; particularmente en los deportes colectivos el análisis táctico ha crecido de forma exponencial. El objetivo de este estudio fue detectar las relaciones que se establecen entre las conductas de finalización de los jugadores interiores de un equipo de baloncesto y su repercusión en el rendimiento del equipo. Para ello, y utilizando un diseño nomotético, de seguimientoy multidimensional, se realizó un análisis de coordenadas polares con las observaciones del juego de la Selección Española de Baloncesto Senior Masculina durante su participación en el Campeonato de Europa de 2015. La herramienta de observación creada ha superado el análisis de calidad del dato exigible en Metodología Observacional y está compuesta por 5 criterios y 29 categorías exhaustivas y mutuamente excluyentes. Se registraron un total de 316 acciones ofensivas, que pusieron de manifiesto la influencia de los jugadores que ocupan las posiciones interiores en el ataque estático. Los resultados muestran una alta efectividad cuando los ataques son acabados por ellos y la alta producción ofensiva de estos jugadores en acciones individuales, siendo capaces de conseguir canastas o provocar faltas a sus defensores. El análisis de coordenadas polares se ha mostrado como una técnica útil para el análisis táctico de las conductas que suceden en el deporte de competición. (AU)

In recent years, there has been an increased interest in knowing the most effective actions during competition, as this fact has proven essential to improve the performance of players in elite sport; particularly in team sports, tactical analysis has grownexponentially. The objective of this study was to detect the relationships that were obtained between the finishing behaviors of the inside players of a basketball team and it is impact on team performance. To do so, and using nomothetic, follow-up and multidimensional observational design, polar coordinates analysis was performed from the observations of the game of the Spanish men basketball team during European Championships in 2015. The observational tool, formed by 5 criteria and 29 exhaustive and mutually exclusive categories, was created and passed the data quality analysis required in Observational Methodology. A total of 316 offensive actions were registered and revealed the influence of the inside players in the static attack. The results showed ahigh effectiveness when the attacks are finished by inside players, and the high offensive production of these players in individual actions, being able to get baskets or cause fouls to their defenders. Polar coordinates analysis has been shown as a useful technique to tactical analysis of the behaviors that occur in competitive sport. (AU)

Nos últimos anos tem havido um interesse crescente em conhecer as acções mais eficazes durante a competição, uma vez que este facto se revelou essencial para melhorar o desempenho dos jogadores no desporto de elite; particularmente nos desportos colectivos, a análise táctica tem crescido exponencialmente. O objectivo deste estudo era detectar as relações estabelecidas entre os comportamentos finais dos jogadores internos de uma equipa de basquetebol e o seu impacto no desempenho da equipa. Para o fazer, e utilizando um design nomotético, de seguimento e multidimensional, foi realizada uma análise de coordenadas polares com as observações do jogo da Selecção Espanhola de Basquetebol Masculino Sénior durante a sua participação no Campeonato Europeu de 2015. O instrumento de observação criado passou a análise da qualidade dos dados exigida na Metodologia de Observação e é composto por 5 critérios e 29 categorias exaustivas e mutuamente excludentes. Foi registado um total de 316 acções ofensivas, que mostraram a influência de jogadores que ocupavam posições internas no ataque estático. Os resultados mostram uma elevada eficácia quando os ataques são finalizados por eles e a elevada produção ofensiva destes jogadores em acções individuais, podendo obter cestos ou causar faltas aos seus defensores. A análise das coordenadas polares demonstrouser uma técnica útil para a análise táctica dos comportamentos que ocorrem no desporto de competição. (AU)

Polar Coordinate Analysis to study counterattacks in senior and under-16 Men's Handball / Análisis de Coordenadas Polares para estudiar el contraataque senior y sub 16 en balonmano masculino / Análise do contra-ataque sênior e sub 16 no handebol masculino usando coordenadas polares

The aim of this study was to analyze counterattack actions by elite and under-16 players in men's handball using a methodologically validated taxonomic system. We analyzed counterattack actions in 17 games involving elite players as well as 10 games in Spanish championship of under-16 regional teams. We used the HOISAN software package and employed the polar coordinate analysis technique from the perspective of genuine retrospectivity. The taxonomy of the coding system was developed through a combination of a field format system and an exhaustive and mutually exclusive (E/ME) system of categories. The instrument includes 19 criteria and 148 categories. The focal categories used in this study were behaviors having to do with ball recovery, ball transport and counterattack completion. Differences between the studied populations were found for counterattack completion, deployment, transport and ball recovery. Technical errors were associated with the 6:0 defense in the elite categories and with the 5:1 defense in the under-16 category. In the senior categories, the number of players participating in counterattacks tended to be higher and a numerical advantage in the opponent's half of the court was associated with the team being ahead in the score; in the under-16 category, this behavior was associated with trailing in the score. We also observed that greater defender and goalkeeper effectiveness gives rise to more counterattack situations and under more favorable circumstances, and that this effectiveness is a determining factor in the success of a counterattack. The polar coordinate technique has estimated the technical-tactical relations in competition, which will allow to determine the psychological intervention strategies that improve performance

El objetivo de este estudio fue analizar las acciones de contraataque de jugadores de élite y sub'16 en el balonmano masculino utilizando un sistema taxonómico validado metodológicamente. Analizamos las acciones en 17 partidos con jugadores de élite, así como 10 partidos en el campeonato de España de selecciones territoriales sub'16. Utilizamos el software HOISAN y empleamos la técnica de análisis de coordenadas polares desde la perspectiva de una retrospectividad genuina. La taxonomía del sistema de codificación se desarrolló mediante una combinación de un sistema de formato de campo y un sistema de categorías exhaustivo y mutuamente excluyente (E/ME). El instrumento incluye 19 criterios y 148 categorías. Las categorías focales utilizadas en este estudio fueron los comportamientos relacionados con la recuperación del balón, el transporte y la finalización del contraataque. Se encontraron diferencias entre las poblaciones estudiadas para la finalización del contraataque, el despliegue, el transporte y la recuperación. Los errores técnicos se asociaron con la defensa 6:0 en las categorías de élite y con la defensa 5:1 en la categoría de menores de 16 años. En las categorías senior, el número de jugadores que participaron en los contraataques tendió a ser mayor y una ventaja numérica en la mitad del campo se asoció con el equipo que estaba delante en el marcador; en la categoría sub'16, este comportamiento se asoció con el seguimiento en la puntuación. También se observa que una mayor efectividad del defensor y el portero da lugar a más situaciones de contraataque y en circunstancias más favorables, y que esta efectividad es un factor determinante en el éxito del contraataque. La técnica de coordenadas polares ha estimado las relaciones técnico-tácticas en competición, lo que permitirá determinar las estrategias de intervención psicológica que mejoren el rendimiento

O objetivo deste trabalho foi analisar as ações de contra-ataque no handebol masculino em dois grupos de jogadores de elite e um menor de 16 anos. Este trabalho tem como objetivo contribuir para a compreensão das ações no Handebol Masculino a partir de uma nova perspectiva. A partir de um sistema taxonômico validado metodologicamente, foram analisadas as ações de contra-ataque de 17 partidas de elite (10 da categoria espanhola mais alta de 2007-08 e 7 da equipe nacional no Campeonato Europeu de 2007) e 10 do campeonato de equipes regionais. sub 16 2006. Para isso, a técnica de coordenadas polares foi usada em sua versão genuína com o software Hoisan. As categorias focais têm sido utilizadas para recuperação de bola, transporte e comportamento de completação. Foram encontradas diferenças entre as terminações de contra-ataque nas três populações estudadas, bem como no modo de implantação, transporte e recuperação do celular. O erro técnico se manifesta desde a defesa 6: 0 nos seniores e 5: 1 no sub 16. Além disso, observouse que nas categorias seniores um número maior de jogadores participa e a superioridade numérica no centro do campo é alcançada com uma pontuação para por favor, estar no sub 16 com pontuação contra. Além disso, observouse que o aumento da eficiência defensiva e da meta traz mais situações de contra-ataque e em circunstâncias mais favoráveis, sendo decisivas para o sucesso do contra-ataque

Actividad física, funcionamiento cognitivo y psicosocial en una muestra preadolescente / Physical activity, cognitive and psychosocial functioning in a preadolescent sample / Atividade física, funcionamento cognitivo e psicossocial em uma amostra pré-adolescente

El objetivo de este estudio fue analizar las diferencias existentes en diversas variables de funcionamiento cognitivo, psicosocial y condición física entre dos grupos de preadolescentes en función de la cantidad de práctica física semanal que realizaban. La muestra estuvo compuesta por 149 participantes (113 niños), entre 10 y 13 años de edad (M = 11.60; DT = 0.49). Para analizar el funcionamiento cognitivo se utilizó el Test de atención D2, las pruebas de interferencia y senderos de la batería de Evaluación Neuropsicológica de las Funciones Ejecutivas en Niños (ENFEN) y las pruebas de búsqueda de símbolos y claves de la Escala de Inteligencia para niños WISC-IV. Los instrumentos utilizados para evaluar el funcionamiento psicosocial fueron el Cuestionario Autoconcepto Forma 5 (AF5) y la Escala de autoeficacia para niños (EAN). La condición física se evaluó a través del test de velocidad 5x10 metros, el test de Course Navette y el test de salto horizontal. Los resultados mostraron mejores puntuaciones en condición física (e. g. , VO2máx = p < .001; d' Cohen= 0.85, 95% IC [0.51, 1.18]), funcionamiento cognitivo (e. g. , Velocidad de procesamiento = p < .05; d' Cohen= 0.44, 95% IC [0.11, 0.77]) y psicosocial (e. g. , autoconcepto físico = p < .001; d' Cohen = 0.69, 95% IC [0.35, 1.02]) en los participantes que realizaban mayor actividad física semanal. Estos resultados son congruentes con investigaciones previas y sugieren la necesidad de promocionar la práctica física entre los niños y adolescentes por sus implicaciones en la salud y el bienestar

The objective of this study was to analyze the differences in various variables of cognitive and psychosocial functioning, as well as physical condition between two groups of preteens depending on the amount of weekly physical practice they performed. The sample consisted of 149 participants (113 preadolescent) with ages between 10 to 13 years old (M= 11.60; DT= 0.49). Regarding the cognitive function analysis, it was used the D2 Attentiveness questionnaire, the interference and paths of the battery of Neuropsychological Evaluation of the Executive Functions in Children (ENFEN) and the tests of search of symbols and keys of the Intelligence Scale for children (WISC-IV). The tests or tools used to size up the psychosocial wellness were the Self-concept Questionnaire Form 5 (AF5) and the Self-efficacy scale for children (EAN). In regard to the physical condition, Speed test 5x1, Course Navette test and Horizontal jump test were used. The results discharged by the research showed highest results in physical condition (e. g. , VO2max = p < .001; d' Cohen = 0.85, 95% IC [0.51, 1.18]), cognitive (e. g. , Processing speed = p < .05; d' Cohen = 0.44, 95% IC [0.11, 0.77]) and psychosocial functioning (e. g. , Physical self-concept = p < .001; d' Cohen = 0.69, 95% IC [0.35, 1.02]) in the participants who perform more physical activity per week. These results are congruent with previous research and suggest the need to promote physical practice among children and adolescents for their health and well-being implications

O objetivo deste estudo foi analisar as diferenças em várias variáveis do funcionamento cognitivo, condição psicossocial e física entre dois grupos de pré-adolescentes, de acordo com a quantidade de prática física semanal realizada. A amostra foi composta por 149 participantes (113 crianças), com idades entre 10 e 13 anos (M = 11.60; DP = 0.49). Para analisar o funcionamento cognitivo, foram utilizados o Teste de Atenção D2, testes de interferência e percursos de bateria da Avaliação Neuropsicológica de Funções Executivas em Crianças (ENFEN) e os testes de símbolos e chaves da Escala de Inteligência para crianças. (WISC-IV). Os instrumentos utilizados para avaliar o funcionamento psicossocial foram o Questionário de Autoconceito Form 5 (AF5) e a Escala de Autoeficácia Infantil (EAN). A condição física foi avaliada através do teste de velocidade de 5x10 metros, do teste Course Navette e do teste de salto horizontal. Os resultados mostraram melhores pontuações em condição física (e. g. , VO2máx = p < .001; d' Cohen = 0.85, 95% IC [0.51, 1.18]), funcionamento cognitivo (e. g. , velocidade de processamento = p < .05; d' Cohen = 0.44, 95% IC [0.11, 0.77]) e psicossocial (e. g. , autoconceito físico = p < .001; d' Cohen = 0.69, 95% IC [0.35, 1.02]) em participantes que realizavam atividade física mais semanal . Esses resultados são consistentes com pesquisas anteriores e sugerem a necessidade de promover a prática física de crianças e adolescentes devido às suas implicações para a saúde e o bem-estar

Perfil psicológico deportivo y ansiedad estado competitiva en triatletas / Psychological sport profile and competitive state anxiety in triathletes

El propósito de este trabajo fue examinar las relaciones entre el perfil psicológico y la ansiedad estado competitiva en un grupo de triatletas. Participaron en el estudio 94 triatletas con edades entre 19 y 55 años (M = 35.44; DT = 8.17). Se utilizó el Inventario Psicológico de Ejecución Deportiva (IPED) para analizar el perfil psicológico de los participantes y el Inventario de Ansiedad Estado en Competición-2 (CSAI-2) para evaluar la ansiedad estado. Los análisis de correlación efectuados pusieron de manifiesto relaciones significativas entre la mayoría de los constructos estudiados, menos entre el control viso imaginativo y nivel motivacional con la ansiedad cognitiva y somática. Además, los modelos de regresión lineal generados indicaron que el control de afrontamiento negativo predecía las puntuaciones de ambas manifestaciones de la ansiedad estado, y que la autoconfianza era predicha por el control de afrontamiento negativo, el control atencional y el control viso-imaginativo

The purpose of this study was to examine the relationship between psychological profile and competitive state anxiety in a group of triathletes. Participated in this study 94 athletes aged between 19 and 55 years (M = 35.44; SD = 8.17). Psychological Inventory for Sport Performance (IPED) was used to analyze the psychological profile of the participants and the Inventory for Anxiety State in Competition-2 (CSAI-2) to assess state anxiety. Correlation analyzes performed showed significant relationships between the constructs studied, except for the visual-imaginative control and the motivational level with the cognitive and somatic state anxiety. In addition, the proposed linear regression models proved that both anxiety manifestations were predicted by the negative coping control, and that self-confidence was predicted by the negative coping control, the attentional control and the visual-imaginative control

Relaciones entre el perfil psicológico deportivo y la ansiedad competitiva en jugadores de balonmano playa / The relationsship between the sports psychological profile and competitive anxiety in beach handball players / A relação entre o perfil psicológico desportivo e a ansiedade competitiva em jogadores de andebol de Praia

El objetivo de la presente investigación fue examinar las relaciones entre el perfil psicológico deportivo y la ansiedad competitiva en una muestra de jugadores de balonmano playa. En el estudio participaron un total de 112 jugadores sub-19 y senior con edades entre 17 y 32 años (M = 23.23; DE = 6.81). Un 55.36% de género masculino (n = 62) y el 44.64% de género femenino (n = 50). Se utilizó el Inventario Psicológico de Ejecución Deportiva (IPED) para analizar el perfil psicológico deportivo de los participantes y el Inventario del Estado de Ansiedad en Competición-2 (CSAI 2) para evaluar el estado de ansiedad y la autoconfianza. Los análisis de correlación y de regresión lineal efectuados pusieron de manifiesto relaciones significativas entre los constructos estudiados. Para el total de la muestra el control de afrontamiento negativo y el nivel motivacional fueron los mejores predictores de la ansiedad, y el control de afrontamiento negativo y positivo los predictores más importantes de la autoconfianza, existiendo algunas diferencias en función del género en todos los modelos. Los resultados hallados denotan una relación entre las variables analizadas y sugieren que el conocimiento de los perfiles psicológicos deportivos podría ayudar a analizar los estados de ansiedad y confianza en los deportistas

The aim of this research was to examine the relationship between the sports psychological profile and competitive anxiety in a group of beach handball players. 112 under-19's and adult players aged between 17 and 32 years (M = 23.23; SD = 6.81) took part in the study. 55.36% of the participants were male (n = 62) and 44.64% were female (n = 50). The Psychological Inventory of Sports Performance (IPED) was used to analyse the psychological profile of the participants and the Competitive State Anxiety Inventory-2 (CSAI-2) to evaluate their state of anxiety and self-confidence. The correlation of the analysis and linear regression carried out revealed significant relationships between the studied constructs. For the total sample, negative coping control and motivational level were the best predictors of anxiety, with negative and positive coping control being the most important predictors of confidence. Some differences existed depending on gender in all the models. The results found revealed a relationship between the variables analysed and they suggest that knowledge about psychological sporting profiles could help analyse the state of anxiety and confidence in athletes

O objectivo da presente investigação foi examinar as relações entre o perfil psicológico desportivo e a ansiedade competitiva numa amostrade jogadores de andebol de praia. No estudo participaram um total de 112 jogadores sub-19 e sénior com idade compreendida entre os 17 e os 32 anos(M= 23.23; DP= 6.81). Destes, 55.36% eram do género masculino (n= 62) e 44.64% do género feminino (n= 50). Foi utilizado o QuestionárioPsicológico de Execução Desportiva(IPED) para analisar o perfil psicológico desportivo dos participantes e o Questionário de Estado de Ansiedade emCompetição(CSAI-2) para avaliar o estado de ansiedade e autoconfiança. As análises de correlação e de regressão linear efectuadas evidenciam relaçõessignificativas entre os construtos estudados. Para o total da amostra, o coping negativo e o nível motivacional foram os melhores preditores de ansiedade,e o coping negativo e positivo os preditores mais importantes de autoconfiança, existindo algumas diferenças em função do género em todos os modelos.Os resultados encontrados denotam uma relação entre as variáveis analisadas e sugerem que o conhecimento dos perfis psicológicos desportivos poderiamajudar a analisar os estados de ansiedade e confiança dos desportistas

Efectos de la actividad física sobre las funciones ejecutivas en una muestra de adolescentes / Effects of physical activity on executive function in a sample of adolescents

El propósito de este trabajo fue analizar los efectos de un programa de actividad física, con una duración de 8 semanas y basado en juegos reducidos, sobre diversas variables cognitivas vinculadas al constructo funciones ejecutivas como memoria de trabajo, inhibición y flexibilidad cognitiva. Los participantes fueron 54 adolescentes, físicamente inactivos, de la ciudad de Priego (Córdoba, España), con edades entre los 15 y 16 años (M= 15.35; DT= .48). Se empleó un diseño pre-post con dos grupos aleatorizados, control y experimental. Los instrumentos utilizados para evaluar las habilidades cognitivas fueron el test Dígitos y el test Letras y Números, de la Escala de Inteligencia de Wechsler para Niños (WISC-IV), el Trail Making Test y el Test Stroop. Se realizó un análisis de la varianza mixta 2x2 para determinar los efectos del tratamiento. Los resultados indicaron efectos positivos del programa de actividad física sobre la memoria de trabajo y la flexibilidad cognitiva, aunque con un tamaño del efecto bajo. Se propone incrementar el tiempo de intervención y aplicar diferentes programas para observar el impacto del tipo de actividad en futuras investigaciones

The aim of this study was to analyse the effects of a physical activity program, eight-week and based on small sided games, on some variables associated to executive functions construct such as working memory, inhibition and cognitive flexibility. The participants in the study were 54 adolescents, who were physically inactive, from the city of Priego (Córdoba, Spain), whose age ranged between 15 and 16 years old (M=15.35; SD= .48). The study was based on a quasi-experimental pre-post design with two randomized groups, control and experimental. The instruments used to evaluate the cognitive skills were Digits and Letters and Numbers tests of the Wechsler Intelligence Scale for Children (WISC-IV), the Trail Making Test (A and B) and the Stroop Test. It was realized an analysis of the mixed variance 2x2 to determine the effects of the treatment. Results showed positive effects of the physical activity program on working memory and cognitive flexibility, although the effect size was weak. It is proposed to increase the time of intervention and apply different treatments to observe the impact of type of activity for future research

[Effects of small-sided exercises on body composition and maximal oxygen uptake in adolescents]. / Efecto de los juegos reducidos en la composición corporal y la condición física aeróbica en un grupo de adolescentes escolares.

BACKGROUND: The regular practice of physical activity contributes to weight control and improves maximal oxygen uptake (VO2max), socialization and quality of life. AIM: To determine the effect of moderate-to-vigorous physical activity on body composition and VO2max in a group of overweight school-age males. MATERIAL AND METHODS: We studied fifty-five overweight males aged 15.6 ± 0.7 years. Participants were divided in two groups (experimental and control groups). The intervention in the experimental group was the practice of small-sided games during 60 minutes, two days per week and during 11 weeks. At baseline and the end of the intervention, body composition was measured using bioimpedance and VO2max was calculated using the Course Navette test. RESULTS: A 7% reduction in the percentage of body fat and a 9% increase in VO2max were observed in the experimental group (p < 0.01). No changes were recorded in the control group. CONCLUSIONS: Eleven weeks of small-sided exercises performed twice per week increased VO2max and reduced fat mass in overweight adolescents.

Efecto de los juegos reducidos en la composición corporal y la condición física aeróbica en un grupo de adolescentes escolares / Effects of small-sided exercises on body composition and maximal oxygen uptake in adolescents

Background: The regular practice of physical activity contributes to weight control and improves maximal oxygen uptake (VO2max), socialization and quality of life. Aim: To determine the effect of moderate-to-vigorous physical activity on body composition and VO2max in a group of overweight school-age males. Material and Methods: We studied fifty-five overweight males aged 15.6 ± 0.7 years. Participants were divided in two groups (experimental and control groups). The intervention in the experimental group was the practice of small-sided games during 60 minutes, two days per week and during 11 weeks. At baseline and the end of the intervention, body composition was measured using bioimpedance and VO2max was calculated using the Course Navette test. Results: A 7% reduction in the percentage of body fat and a 9% increase in VO2max were observed in the experimental group (p < 0.01). No changes were recorded in the control group. Conclusions: Eleven weeks of small-sided exercises performed twice per week increased VO2max and reduced fat mass in overweight adolescents.

Relación del autoconcepto con la condición física y la composición corporal en una muestra de adolescentes / Relationships of self-concept with physical fitness and body composition in a sample of adolescents

El propósito de este trabajo es examinar las relaciones entre el autoconcepto y diferentes variables de la condición física, así como el porcentaje de masa grasa. Han participado en el estudio 283 adolescentes de la ciudad de Málaga (España), en edades comprendidas entre los 14 y 16 años (M=15.14; DT= .76). Se ha utilizado el Cuestionario Autoconcepto Forma 5 (AF5) para evaluar el autoconcepto multidimensional (académico, social, emocional, familiar y físico). Se ha medido el porcentaje de masa grasa corporal usando un instrumento de bioimpedancia eléctrica y el consumo máximo de oxígeno a través del test de Course Navette. Además, se ha estimado el tiempo en recorrer 50 metros lisos, la distancia alcanzada mediante salto horizontal y la amplitud de movimiento con la prueba flexión profunda de tronco. Los análisis de correlación y regresión lineal efectuados ponen de manifiesto la conexión entre las variables objeto de estudio, siendo el porcentaje de masa grasa y el consumo de oxígeno máximo aquellas que mejor se han relacionado con el autoconcepto. Además, las dimensiones física y emocional son las que han sido predichas con un mayor porcentaje de la varianza explicada

The aim of this study is to analyse the relationship between self-concept and several variables of physical fitness, as well as the body fat percentage. The participants in the study were 283 teenagers from the city of Malaga (Spain), whose age ranged between 14 and 16 years old (M = 15.14; SD = .76). The "Autoconcepto Forma 5" questionnaire (AF5) was used to evaluate the multidimensional self-concept (academic, social, emotional, physical, and family self-concept). Moreover, the body fat percentage was measured by means of a bioelectrical impedance analysis. The Course-Navette test was used to assess the maximal oxygen consumption. Other measured variables were the time to run 50 metres, the distance jumped horizontally, and the range of movement (by means of a deep trunk flexion test). The linear regression and correlation analysis highlighting that the variables which have the strongest association with self-concept are the body fat percentage and the maximal oxygen consumption. Besides, physical and emotional dimensions are those that have been predicted with a higher percentage of explained variance