Consolidation, Stages of Change, and Loyalty among Users of Public Sports and Health Services Aged 12-16.

There are two main lines of inquiry in the literature on adherence and/or loyalty to the practice of physical activity and to health services: one focuses on the impact of perceived quality of sports and health services and satisfaction with these services on user loyalty, while the other concludes that users with more self-determined motivation at more advanced stages of physical activity display higher levels of physical activity and greater intentions to continue this activity. The objective of this study is to ascertain the impact of different dimensions of sports service quality on satisfaction and loyalty among users aged 12 to 16 years old and to identify any differences between adolescent users at more and less consolidated stages of physical activity. A total of 1717 minors with a mean age of 13.83 ± 1.32 years who practise organised physical activity at public sports centres in Nuevo León (Mexico), 51.5% of whom were boys, participated in the study. The model of structural equations linking quality, satisfaction, and loyalty displayed adequate indices. The results showed that the staff, specific activity, and user satisfaction are predictors of loyalty. Significant differences were only found between minors at consolidated and non-consolidated stages of physical activity in the relationship between service personnel and loyalty. In conclusion, human resources and their deployment are predictive of loyalty towards sports and health services among adolescents.

Customer Loyalty in Recreational Long-Distance Races: Differences Between Novice and Experienced Runners.

A growing number of recreational races are being held in different locations, drawing many local and visiting runners. This study examined the relationships between quality, value, satisfaction, and loyalty among runners in a recreational race and examines potential differences in relationships between these constructs based on the runners' experience. The participants were 985 runners with a mean age of 40.74±9.41years. Validated, reliable ad hoc instruments were used. A multi-group analysis was performed to ascertain the existence of relationships between the constructs and differences in the relationships between the different study groups. The results show that quality is a direct antecedent of value and satisfaction. Value is directly related to satisfaction and indirectly related to loyalty. Satisfaction is related to the loyalty of participants in the race. Differences in the relationship between satisfaction and loyalty were dependent upon the runners' experience. Loyalty to a race depends primarily on satisfaction and is modified by the runners' experience.

Psychological Wellbeing in Physical Education and School Sports: A Systematic Review.

Mental health in children and adolescents has become an increasingly important topic in recent years. It is against this backdrop that physical education and school sports play an important role in promoting psychological wellbeing. The aim of this review was to analyse interventions for improving psychological wellbeing in this area. To this end, a literature review was conducted using four databases (WOS, SPORTDiscus, SCOPUS and ERIC) and the following keywords: psychological wellbeing, physical education, and school sports. Twenty-one articles met the inclusion criteria. The results showed that interventions varied greatly in terms of duration and used a wide range of strategies (conventional and non-conventional sports, physical activity, games, etc.) for promoting psychological wellbeing, primarily among secondary school students. There was a lack of consensus as to the conceptualisation of the construct of psychological wellbeing, resulting in a variety of tools and methods for assessing it. Some studies also suggested a link between psychological wellbeing and other variables, such as basic psychological needs and self-determination. Finally, this study provides a definition of psychological wellbeing through physical activity based on our findings.

Implementing Service-Learning Programs in Physical Education; Teacher Education as Teaching and Learning Models for All the Agents Involved: A Systematic Review.

Service-learning (SL) is the subject of a growing number of studies and is becoming increasingly popular in physical education teacher education (PETE) programs. The objective of this study was to conduct a systematic review of the implementation of SL programs with PETE students. The databases used were Web of Science, SPORTDiscus (EBSCO), and SCOPUS. Articles were selected on the basis of the following criteria: (a) published in a peer-reviewed journal; (b) covers the use of SL programs with PETE students; (c) relates to physical education or physical activity programs; (d) availability of a full-text version in English and/or Spanish. Thirty-two articles met the inclusion criteria. Two types of findings were observed: firstly, findings relating to the study characteristics and objectives and, secondly, recommendations for improvement of this type of intervention. The objectives of the different studies focused on (a) the impact of the SL methodology on PETE students' professional, social, and personal skills; (b) its impact on the community; (c) analysis of the effectiveness and quality of the programs. All but two studies analyzed the impact of SL on PETE, while only four analyzed community participants and only three analyzed the quality of the SL program. Recommendations for improving SL programs used with PETE students included: all stakeholders, e.g., students and community participants, should be studied and coordinated; the quality of the programs should be assessed, as studying the effectiveness of SL programs could help to attain the objectives of both students and the community; mixed methods should be used; and intervention implementation periods should be extended to provide more objective, controlled measurements.

Communication as a Strategy to Promote Sports and Health Activities Designed for Adolescents.

Physical activity reduces the risk of developing noncommunicable diseases and improves quality of life, providing health benefits for present and future generations. This is especially relevant for adolescents. Educational institutions are promoters of healthy habits through the organisation of different activities such as extracurricular sports programmes. These activities increase the rates of sports practice among adolescents. The literature shows that the perceived quality of sports and health services is an antecedent of users' behavioural intentions. The aim of this paper is to find out whether communication from educational/sports organisations influences adolescents' intentions to continue engaging in physical activity. A total of 1080 students participated, with a mean age of 13.76 ± 1.39 years, 34.1% of whom were girls. Tests were conducted to verify the validity and reliability of the model that relates communication with value, satisfaction, and future intentions. Tests were conducted to verify the validity (average variance extracted was between 0.754 and 0.583) and reliability (composite reliability was between 0.925 and 0.813) of the model that relates communication with value, satisfaction, and future intentions. Confirmatory analyses and factor invariance tests were performed. The results revealed that communication is an antecedent of value, satisfaction, and future intentions. In conclusion, communication is a good strategy to consolidate sporting habits in both male and female adolescents.

Women and Physical Activity in Fitness Centres. Analysis of Future Intentions and Their Relationship with Age.

Physical activity is an important tool for promoting women's health. Increasing adherence to physical activity is a challenge for governments and private entities. One of the main objectives of the fitness sector is to build customer loyalty. Their behavioural intentions according to gender and age may be a determining factor. The aim of this study was to establish a model that relates the fitness centre's quality as perceived by female customers, these customers' future intentions, satisfaction, and age. A total of 745 women participated in this study, with a mean age of 32.97 ± 14.11, divided into three age groups. A confirmatory analysis, a factor invariance analysis, and a multi-group analysis were conducted to verify the validity and reliability of the model. The results revealed that quality is an antecedent of both perceived value and satisfaction in the three age groups. Perceived value is a precursor of satisfaction, except in the group of women over 45 years old. The only antecedent to adaptation to price is quality, except in the older age group. Finally, perceived value was found to be related to adaptation to price. These results will facilitate the development of strategies to promote physical activity among women according to their age.

Asociación entre condición fisica y autoconcepto fisico en estudiantes españoles de 12-16 años / Association between physical fitness and physical self-concept in 12-16 year-old spanish schoolchildren

Resumen El objetivo del trabajo fue examinar la asociación de la fuerza muscular, potencia aeróbica y composición corporal con el autoconcepto físico en adolescentes de diferente sexo. Un total de 1816 adolescentes españoles (12-16 años) participaron en este estudio transversal. Se administró el Cuestionario de Autoconcepto Físico, las pruebas de fuerza muscular y potencia aeróbica de la batería ALPHA y se calculó el índice de masa corporal a partir de medidas objetivas. Los análisis de regresión logística mostraron que los adolescentes de ambos sexos con baja fuerza muscular, potencia aeróbica y con sobrepeso u obesidad tuvieron significativamente mayores odds ratios de reportar autoconcepto físico bajo. Los resultados de la asociación entre fuerza muscular y autoconcepto físico fueron sensibles al sexo y a la prueba de evaluación. Unos niveles de condición física saludable estuvieron asociados con el autoconcepto físico positivo en adolescentes. La influencia del sexo en esta asociación debe considerarse cuando se busque mejorar el autoconcepto físico.

Abstract The aim of this study was to examine the association of muscular fitness, cardiorespiratory fitness and body composition with physical self-concept in adolescents of different sex. A total of 1816 Spanish adolescents (aged 12-16) participated in this cross-sectional study. Physical Self-concept Questionnaire and ALPHA battery tests were administered to evaluate muscular fitness and cardiorespiratory fitness, and body mass index was calculated from objective measurements. Logistic regression analysis showed that adolescents of both genders with low muscular fitness, cardiorespiratory fitness, and overweight had significantly higher odds ratios of showing a low physical self-concept. The results of the association between muscular fitness and physical self-concept were sensitive to gender and the evaluation test. Healthy fitness levels were associated with a positive physical self-concept in adolescents. Gender differences should be considered when seeking to enhance physical self-concept.

[Not Available]. / Influencia de padres y amigos sobre la actividad física de tiempo libre en escolares españoles de 12-16 años: diferencias por sexo e intensidad.

Introducción y objetivos: examinar la asociación del apoyo de los padres y de los amigos con diferentes intensidades de actividad física durante el tiempo libre de adolescentes españoles de ambos sexos.Métodos: un total 352 adolescentes españoles (51.70% chicos; 12-16 años) cumplimentaron el International Physical Activity Questionnarie for Adolescents y un cuestionario validado sobre apoyo social. Se realizaron análisis de regresión linear ajustados por edad.Resultados: el apoyo social de padres y amigos influyó positivamente sobre los niveles de actividad física vigorosa que los adolescentes españoles realizan durante su tiempo libre (ß=.226 y ß=.285 en chicos y ß=.167 y ß=.181 en chicas, para el apoyo de padres y amigos respectivamente) y sobre los de intensidad moderada en el caso de las chicas (ß=.195 y ß=.200, respectivamente).Conclusiones: el apoyo de padres y amigos contribuye a los niveles de actividad física moderada o vigorosa en adolescentes españoles.

Influencia de padres y amigos sobre la actividad física de tiempo libre en estudiantes españoles de 12-16 años: diferencias por sexo e intensidad / Influence of parents and friends on free time physical activity in Spanish students in years 12 to 16: gender and intensity differences

Introducción y objetivos: examinar la asociación del apoyo de los padres y de los amigos con diferentes intensidades de actividad física durante el tiempo libre de adolescentes españoles de ambos sexos. Métodos: un total 352 adolescentes españoles (51,70% chicos; 12-16 años) cumplimentaron el International Physical Activity Questionnarie for Adolescents y un cuestionario validado sobre apoyo social. Se realizaron análisis de regresión lineal ajustados por edad. Resultados: el apoyo social de padres y amigos influyó positivamente sobre los niveles de actividad física vigorosa que los adolescentes españoles realizan durante su tiempo libre (β = 0,226 y β = 0,285 en chicos y β = 0,167 y β = 0,181 en chicas, para el apoyo de padres y amigos respectivamente) y sobre los de intensidad moderada en el caso de las chicas (β = 0,195 y β = 0,200, respectivamente). Conclusiones: el apoyo de padres y amigos contribuye a los niveles de actividad física moderada o vigorosa en adolescentes españoles (AU)

Background and objectives: This study examined the association of parents and friends support with differents intensities of free time physical activity in Spanish adolescents of both genders. Methods: A total of 352 Spanish adolescents (51.70% boys; 12-16 years) completed the International Physical Activity Questionnaire for Adolescents and a validated questionnaire about social support. Linear regression analysis were performed adjusted for age. Results: Social support from parents and friends infl uenced positively on vigorous free time physical activity in Spanish adolescents (β = 0.226 and β = 0.285 in boys, and β = 0.167 and β = 0.181 in girls, for parents and friends support respectively), and on moderate free time physical activity levels in girls (β = 0.195 and β = 0.200 respectively). Conclusions: Parents and friends support contributes to moderate-or-vigorous physical activity levels in Spanish adolescents (AU)

Relationship of physical activity and sedentarism with tobacco and alcohol consumption, and Mediterranean diet in Spanish teenagers / Relación de actividad física y sedentarismo con el consumo de tabaco y alcohol y dieta mediterránea en adolescentes españoles

Background and objectives: This study examined the association of physical activity and sedentarism with tobacco and alcohol consumption, and adherence to the Mediterranean diet in teenagers of both genders. Methods: A total number of 1897 Spanish teenagers (12-16 year-olds) took part in the present cross-sectional study. The variables were measured by means of questionnaires previously validated for these ages. Results: Physical activity was positively associated to the degree of adherence to the Mediterranean diet for both genders (ß = .144, P < .001 for boys and ß = .066, P < .05 for girls), and inversely associated to smoking for boys (ß = -.135, P = < .05, respectively) and girls (ß = -.148 and ß = -.141, both P < .01 and ß = .199, P < .001, respectively). Conclusion: results suggest that physical activity and sedentary behaviours have an important relationship with the adherence to the Mediterranean diet in teenagers. Also, higher levels of physical activity in boys can lead to reduced tobacco use, while watching TV and PC leisure can lead to increased alcohol consumption in girls (AU)

Introducción y objetivos: Este estudio examinó la asociación de la actividad física y el sedentarismo con el consumo de alcohol y tabaco, y la adherencia a la dieta mediterránea en adolescentes de ambos sexos. Métodos: Un total de 1897 adolescentes españoles (12- 16 años) participaron en el presente estudio transversal. Las variables fueron medidas mediante cuestionarios previamente validados para estas edades. Resultados: La actividad física estuvo positivamente asociada con el grado de adherencia a la dieta mediterránea en ambos sexos (ß = ,144, P < ,001 para chicos y ß = ,066, P < ,05 en chicas), e inversamente asociada con el tabaquismo en chicos (ß = -,135, P = < ,05, respectivamente) y chicas (ß = -,148 y ß = -,141, ambos P < ,01 y ß = ,199, P < ,001, respectivamente). Conclusión: Los resultados sugieren que la actividad física y el sedentarismo tienen una relación importante relación con la adherencia a la dieta mediterránea en adolescentes. Así mismo, altos niveles de actividad física en chicos puede ayudar a reducir el consume de tabaco, mientras que ver la televisión y el uso recreativo del ordenador pueden conducir a un incremento del consumo de alcohol entre las chicas (AU)

Relationship of physical activity and sedentarism with tobacco and alcohol consumption, and Mediterranean diet in Spanish teenagers.

BACKGROUND AND OBJECTIVES: This study examined the association of physical activity and sedentarism with tobacco and alcohol consumption, and adherence to the Mediterranean diet in teenagers of both genders. METHODS: A total number of 1897 Spanish teenagers (12-16 year-olds) took part in the present cross-sectional study. The variables were measured by means of questionnaires previously validated for these ages. RESULTS: Physical activity was positively associated to the degree of adherence to the Mediterranean diet for both genders (ß = .144, P < .001 for boys and ß = .066, P< .05 for girls), and inversely associated to smoking for boys (ß = -.135, P = <.001). Sedentary behaviors for leisure purposes (TV and PC) were negatively associated to adherence to the Mediterranean diet for both boys (ß =-.100 and ß = -.104, both P < .05, respectively) and girls (ß= -.148 and ß = -.141, both P <.001), and positively associated to alcohol consumption for girls (ß = .114, P < .01 and ß = .199, P < .001, respectively). CONCLUSION: results suggest that physical activity and sedentary behaviors have an important relationship with the adherence to the Mediterranean diet in teenagers. Also, higher levels of physical activity in boys can lead to reduced tobacco use, while watching TV and PC leisure can lead to increased alcohol consumption in girls.

Introducción y objetivos: Este estudio examinó la asociación de la actividad física y el sedentarismo con el consumo de alcohol y tabaco, y la adherencia a la dieta mediterránea en adolescentes de ambos sexos. Métodos: Un total de 1897 adolescentes españoles (12-16 años) participaron en el presente estudio transversal. Las variables fueron medidas mediante cuestionarios previamente validados para estas edades. Resultados: La actividad física estuvo positivamente asociada con el grado de adherencia a la dieta mediterránea en ambos sexos (ß = ,144, P < ,001 para chicos y ß = ,066, P < ,05 en chicas), e inversamente asociada con el tabaquismo en chicos (ß = -,135, P =.

Intention to be Physically Active is Influenced by Physical Activity and Fitness, Sedentary Behaviours, and Life Satisfaction in Adolescents.

The aim of this study was to determine the association of levels of physical activity (PA), physical fitness (PF), sedentary lifestyle and life satisfaction with the intention to be physically active after secondary school graduation, in teenagers of both genders. A total of 1986 Spanish adolescents (12-16 years) participated in this cross-sectional study. PA, sedentary lifestyle, life satisfaction and intention to be physically active were assessed through validated questionnaires, and PF was evaluated objectively with the ALPHA battery tests. In both genders, adolescents who had significantly higher odds ratios (OR) of showing low intention to be physically active had low level of PA, cardiorespiratory fitness and muscular fitness in the lower body, and they were more sedentary in front of the computer. The girls that spent a lot of time watching TV and the boys with low life satisfaction also showed higher OR of having low intention to be physically active.

Association of fitness with life satisfaction, health risk behaviors, and adherence to the Mediterranean diet in Spanish adolescents.

The aim of this study was to examine the association between aerobic, musculoskeletal, and motor capacity and life satisfaction, risk behavior, and adherence to the Mediterranean diet in adolescents. A total of 1,988 Spanish adolescents (12-16 years old) participated in this cross-sectional study. Life satisfaction, risk behavior, and adherence to the Mediterranean diet were measured by validated questionnaires for these ages. Aerobic, musculoskeletal muscle, and motor capacity were evaluated objectively with the ALPHA battery tests. Adolescents with low aerobic capacity had a higher risk of showing less (vs. very happy) life satisfaction (odds ratio [OR] = 1.303, 95% confidence interval [CI] = 1,054-1,611). These adolescents were also more likely to report risk behaviors such as sometimes (vs. never) of smoking tobacco (OR = 1.752, 95% CI = 1,218-2,520), besides having a low adherence to the Mediterranean diet (vs. high) (OR = 1.410, 95% CI = 1,113-1,786). Adolescents with low upper-body musculoskeletal capacity showed a lower risk of reporting risk behaviors such as alcohol consumption or getting drunk occasionally (vs. never) (OR = 0.662, 95% CI = 520-843; OR = 0.561, 95% CI = 419-753, respectively). The results suggest that the aerobic capacity contributes significantly to greater adherence to the Mediterranean diet, greater life satisfaction, and lower tobacco consumption, whereas musculoskeletal capacity seems to be related to alcohol consumption.

Adherencia a la dieta mediterránea en adolescentes rurales y urbanos del sur de España, satisfacción con la vida, antropometría y actividades físicas y sedentarias / Adherence to the Mediterranean diet in rural and urban adolescents of southern Spain, life satisfaction,anthropometry, and physical and sedentary activitie

Introducción: La dieta mediterránea es uno de los modelos más saludables de dieta. Los patrones alimentarios mediterráneos están sufriendo un deterioro que puede afectar especialmente a niños y adolescentes. Objetivo: Determinar la adherencia a la dieta mediterránea de los adolescentes del sur de España y su relación con el área de residencia, sexo, edad, satisfacción con la vida, características antropométricas y hábitos de actividad física y sedentaria. Métodos: Un total de 1.973 adolescentes (11-18 años) del sur de España participaron en este estudio descriptivo transversal. El punto de corte entre poblaciones rurales y urbanas fue 10.000 habitantes. La adherencia a la dieta mediterránea fue calculada a partir del cuestionario KIDMED. Satisfacción con la vida, actividad física y sedentarismo también mediante cuestionarios fiables y válidos. Índice de masa corporal y % de grasa corporal fueron medidos utilizando el analizador corporal TANITA BC-420-S. Resultados: El 30,9% de los adolescentes reportó una dieta de calidad óptima, porcentaje superior en poblaciones rurales (P < 0,05). La adherencia fue menor en los adolescentes de mayor edad (P < 0,001), sin diferir entre sexos ni según las variables antropométricas. Los adolescentes más satisfechos con sus vidas (P < 0,001), más activos (P < 0,001), más estudiosos (P < 0,001) y menos sedentarios delante de una pantalla (P < 0,001) mostraron mayor adherencia al patrón alimentario mediterráneo. Conclusión: La mayoría de adolescentes necesitan mejorar su calidad nutricional. En comparación con estos sujetos, los más adheridos a la dieta mediterránea llevaban un estilo de vida más saludable y mostraron mayor satisfacción con sus vidas (AU)

BACKGROUND: The Mediterranean diet is one of the healthier diet models. Mediterranean food patterns are suffering a deterioration that can especially affect children and adolescents. OBJECTIVE: Determine adherence to the Mediterranean diet in adolescents of southern Spain and its relationship with the residence area, sex, age, life satisfaction, anthropometry, and habits of physical activity and sedentary activities. METHODOLOGY: A total of 1973 adolescents (11-18 years) of southern Spain participated in this descriptive cross-sectional study. Cut-off value between rural and urban locations was 10000 inhabitants. Adherence to the Mediterranean diet was calculated from the KIDMED questionnaire. Life satisfaction, physical activity, and sedentary activities also were measured through valid and reliable questionnaires. Body mass index and % body fat were measured using the TANITA BC-420-S body analyzer.RESULTS:30.9% of the adolescents reported an optimal quality diet, percent higher in rural locations (P < 0.05). Adherence was lower in older adolescents (P < 0.001), it was not different between sexes or according to anthropometric variables. Adolescents more satisfied with their lives (P < 0.001), more active (P < 0.001), more studious (P < 0.001), and less sedentary in front of a screen (P < 0.001) showed greater adherence to the Mediterranean food pattern. CONCLUSION: The majority of adolescents need to improve their nutritional quality. Compared with these subjects, the adolescents most adherent to the Mediterranean diet had a healthier lifestyle and they showed greater life satisfaction (AU)

[Adherence to the Mediterranean diet in rural and urban adolescents of southern Spain, life satisfaction, anthropometry, and physical and sedentary activities]. / Adherencia a la dieta mediterránea en adolescentes rurales y urbanos del sur de España, satisfacción con la vida, antropometría y actividades físicas y sedentarias.

BACKGROUND: The Mediterranean diet is one of the healthier diet models. Mediterranean food patterns are suffering a deterioration that can especially affect children and adolescents. OBJECTIVE: Determine adherence to the Mediterranean diet in adolescents of southern Spain and its relationship with the residence area, sex, age, life satisfaction, anthropometry, and habits of physical activity and sedentary activities. METHODOLOGY: A total of 1973 adolescents (11-18 years) of southern Spain participated in this descriptive cross-sectional study. Cut-off value between rural and urban locations was 10000 inhabitants. Adherence to the Mediterranean diet was calculated from the KIDMED questionnaire. Life satisfaction, physical activity, and sedentary activities also were measured through valid and reliable questionnaires. Body mass index and % body fat were measured using the TANITA BC-420-S body analyzer. RESULTS: 30.9% of the adolescents reported an optimal quality diet, percent higher in rural locations (P < 0.05). Adherence was lower in older adolescents (P < 0.001), it was not different between sexes or according to anthropometric variables. Adolescents more satisfied with their lives (P < 0.001), more active (P < 0.001), more studious (P < 0.001), and less sedentary in front of a screen (P < 0.001) showed greater adherence to the Mediterranean food pattern. CONCLUSION: The majority of adolescents need to improve their nutritional quality. Compared with these subjects, the adolescents most adherent to the Mediterranean diet had a healthier lifestyle and they showed greater life satisfaction.

Introducción: La dieta mediterránea es uno de los modelos más saludables de dieta. Los patrones alimentarios mediterráneos están sufriendo un deterioro que puede afectar especialmente a niños y adolescentes. Objetivo: Determinar la adherencia a la dieta mediterránea de los adolescentes del sur de España y su relación con el área de residencia, sexo, edad, satisfacción con la vida, características antropométricas y hábitos de actividad física y sedentaria. Métodos: Un total de 1.973 adolescentes (11-18 años) del sur de España participaron en este estudio descriptivo transversal. El punto de corte entre poblaciones rurales y urbanas fue 10.000 habitantes. La adherencia a la dieta mediterránea fue calculada a partir del cuestionario KIDMED. Satisfacción con la vida, actividad física y sedentarismo también mediante cuestionarios fiables y válidos. Índice de masa corporal y % de grasa corporal fueron medidos utilizando el analizador corporal TANITA BC-420-S. Resultados: El 30,9% de los adolescentes reportó una dieta de calidad óptima, porcentaje superior en poblaciones rurales (P < 0,05). La adherencia fue menor en los adolescentes de mayor edad (P < 0,001), sin diferir entre sexos ni según las variables antropométricas. Los adolescentes más satisfechos con sus vidas (P < 0,001), más activos (P < 0,001), más estudiosos (P < 0,001) y menos sedentarios delante de una pantalla (P < 0,001) mostraron mayor adherencia al patrón alimentario mediterráneo. Conclusión: La mayoría de adolescentes necesitan mejorar su calidad nutricional. En comparación con estos sujetos, los más adheridos a la dieta mediterránea llevaban un estilo de vida más saludable y mostraron mayor satisfacción con sus vidas.

School-age involvement in sport and perceived quality of sport services.

Creating an active and healthy lifestyle starts in infancy and adolescence. A number of individual and collective factors affect whether or not sport is taken up and continued, which is an essential element in achieving a healthy lifestyle in adolescence and extending this into adult life. This study sets out to determine the perceived quality of the sport service provided by schools with organised physical activities, and whether the most positively assessed public organisations have a higher percentage of participation than those with a more negative assessment. The study population was 1109 adolescents from 28 towns comprising part of a sport provision system. A self-devised questionnaire with all the necessary properties, validity and reliability was conducted. The results showed that 42% of the adolescents take part in organised physical sport, and give the service provided a positive assessment. It was found that in organisations with a more positive assessment, the town has a higher rate of involvement in sporting activities.

Predicción de lesiones deportivas mediante modelos matemáticos / Predicting sports injuries by means of mathematical models

Las lesiones deportivas que afectan a los miembros inferiores en los deportes de más impacto, como atletismo o baloncesto, se pueden predecir mediante el uso de ecuaciones de regresión logística. El primer índice predictor de lesiones fue descrito por Shambaugh en 1991, empleando como variables dependientes el desequilibrio del peso en apoyo bipodal y la desviación del ángulo Q del cuadriceps. Salazar (2000) desarrolló una fórmula matemática predictora de lesiones basada en la de Shambaugh mediante una ecuación de regresión logística y Fernández (2004) introdujo el grosor del muslo como variable trascendente en la predicción de lesiones, aportando una ecuación más precisa. Estas investigaciones muestran que el análisis de regresión logística puede ser un método válido en la discriminación de parámetros antropométricos relacionados con las lesiones deportivas, aportando un método fiable y sencillo que se podría utilizar en la práctica médica deportiva habitual

Sports injuries affecting the lower extremities in high impact sports, such as athletics or basketball, can be predicted by means of logistic regression equations. The first injury score was described by Shambaugh in 1991, using imbalance in bilateral weight and deviation of the Q-angle of the quadriceps as dependent variables. Salazar (2000) developed a mathematical equation to predict lesions based on Shambaugh's score and constructed through logistic regression analysis, while Fernández (2004) introduced thigh thickness as a transcendence variable in the prediction of injuries, leading to a more precise equation. These investigations show that logistic regression analysis can be a valid method for discriminating among anthropometric parameters related to sports injuries, providing a simple and reliable method that could be used in the routine practice of sports medicine (AU)