Differences in the physical demands between handball and beach handball players / Diferenças nas exigências físicas entre jogadores de handebol e handebol de praia

Abstract Handball is one of the most practiced team sports worldwide that consists of different modalities, with the aim of reaching as many users as possible. One of the modalities with increasing interest in the last years is Beach Handball, as it takes the advantage of the absence of competitive calendar in the standardized modality so that users continue practicing. A comparative analysis was performed between standard handball (indoor) and beach handball athletes in order to determine the demands of both modalities and determine if they are similar. The competition was evaluated by analyzing external load variables: number of steps, jumps, impacts and Player load. The selected sample was composed of U-16 players from both modalities. Each player was equipped with WIMUTM inertial device. The results showed that the standard modality requires greater physical demands than the beach modality. For this reason, the physical demands of the different modalities require different training processes to obtain the best possible results in the competition.

Resumo O handebol é um dos esportes coletivos mais praticados em todo o mundo, que consiste em diferentes modalidades, com o objetivo de atingir o maior número possível de usuários. Uma das modalidades em expansão nos últimos anos é o Handebol de Praia, pois aproveita a ausência de calendário competitivo na modalidade padronizada para que os usuários continuem praticando. Uma análise comparativa foi realizada entre atletas de handebol padronizado (na pista) e handebol de praia, a fim de determinar as demandas de ambas as modalidades e determinar se essas demandas são semelhantes. A competição foi avaliada através da análise das variáveis externas de carga: número de etapas, saltos, impactos e Player Load. A mostra selecionada foram jogadores de ambas as disciplinas na categoria cadete. Cada jogador foi equipado com um dispositivo inercial WIMUTM. Os resultados mostraram que a modalidade padronizada exige dos atletas maior demanda física que a modalidade de praia. Por esse motivo, os requisitos físicos de ambas as modalidades exigem diferentes processos de treinamento para obter os melhores resultados possíveis na competição.

Are there differences between the loading of an anaerobic capacity test and an agility test in basketball players? / Há diferenças entre a carga de um teste de capacidade anaeróbica e um teste de agilidade em jogadores de basquete?

Abstract The objective of this article was to know players' needs in the selected tests, to search for differences between categories and to know if there is any relationship between different tests. The sample consists of 2 teams (u-14, u-16, n=24), which were equipped with a WimuR inertial device. The selected tests were 2 agility tests and a lactic anaerobic capacity test. Neuromuscular and kinematic variables were selected. Descriptive analysis, inferential analysis and analysis of correlation among variables were carried out. Once players' needs are described, there are no significant differences among kinematic variables depending on the sample category. Nonetheless, there is relationship between kinematic and neuromuscular variables of the different tests. It is frequently claimed that capacity tests are those that cause more fatigue in athletes. For this reason, an analysis was carried out comparing a lactic anaerobic capacity test with an agility test in its two versions. The obtained results can facilitate the work and the evaluation time of a physical condition test since results of athletes in a capacity test could be known by performing tests of lesser requirement. In addition, this would avoid players from experiencing a situation of maximum effort and possible injury, also saving training time.

Resumo O objetivo desse trabalho foi conhecer as demandas dos jogadores nos testes selecionados, buscar diferenças entre categorias e buscar conhecer se havia alguma diferença entre distintas provas. A amostra foi formada por duas equipes (sub-14, sub-16; n = 24) que foram monitorados com dispositivo de inércia WimuR. Selecionaram-se dois testes de agilidade e um teste de capacidade anaeróbica lática, e testes para variáveis neuromusculares e cinemáticas. Empregou-se a análise descritiva e inferencial. Não houve diferenças significativas entre as variáveis cinemáticas, dependendo da categoria da amostra, porém houve relação entre as variáveis cinemáticas e neuromusculares. Afirma-se frequentemente queos testes de capacidade são os que causam maior fadiga no atleta. Por esse motivo, foi realizada uma análise na qual um teste de capacidade anaeróbica lática foi comparado com um teste de agilidade em suas duas versões. Os resultados obtidos podem facilitar o trabalho e o tempo de avaliação do teste de aptidão física, pois, ao realizar testes de menor exigência, os resultados do atleta podem ser conhecidos em um teste de capacidade, evitando que ele enfrente uma situação de esforço máximo, uma possível lesão e economia tempo de treinamento .

Traducción y adaptación cultural del cuestionario exercise fear avoidance scale para su uso en adultos mayores chilenos / Translation and cultural adaptation of the Exercise Fear Avoidance Scale for Chilean older adults / Tradução e adaptação cultural do questionário de escala do exercício para evitar o uso em idosos chilenos

RESUMEN Objetivo Traducir y adaptar culturalmente el cuestionario Exercise Fear Avoidance Scale (EFAS) al español para su uso en adultos mayores chilenos. Materiales y Métodos Doble traducción directa con armonización de versiones, retro-traducción y análisis de la comprensibilidad mediante entrevistas cognitivas. En el proceso de entrevistas cognitivas participaron 20 adultos mayores con edades comprendidas entre 63 y 83 años. Resultados Todos los ítems fueron evaluados como claros y comprensibles. Mediante la técnica de parafraseo e indagación 3 ítems (de un total de 16) se tuvieron que adaptar para lograr una mejor comprensión. Dos de estas adaptaciones consistieron en reemplazar un concepto por uno más utilizado en el contexto chileno y otra modificación fue en relación con la redacción, puesto que su lectura resultaba compleja para esta población. Conclusiones Se obtuvo una versión en español del cuestionario EFAS, la cual demostró ser comprensible y adaptada para su uso en adultos mayores chilenos.(AU)

ABSTRACT Objective To translate and culturally adapt the Exercise Fear Avoidance Scale (EFAS) Into Spanish for Chilean older adults. Materials and Methods Double direct translation with harmonization, back translation and analysis of text comprehensibility through cognitive interviews. A sample of 20 older adults between the ages of 63 and 83 participated in the cognitive interview process. Results All items were assessed as clear and understandable. Using the paraphrasing and inquiry techniques, 3 items (out of 16) were adapted to achieve better understanding. Two of these adaptations consisted in replacing one concept with another, as the latter was more used in the Chilean context, and making a non-literal translation, since the literal one was too complex for the elderly to understand. Conclusions A Spanish version of the EFAS was obtained, which proved to be understandable and adapted for its use with Chilean older adults.(AU)

OBJETIVO Traduza e adapte culturalmente o questionário da Escala de Evitação do Medo do Exercício (EFAS) ao espanhol para uso em idosos chilenos. MATERIAIS E MÉTODOS Tradução direta dupla com harmonização de versões, retrotradução e análise de compreensibilidade por meio de entrevistas cognitivas. Vinte idosos entre 63 e 83 anos participaram do processo de entrevista cognitiva. RESULTADOS Todos os itens foram avaliados como claros e compreensíveis. Usando a paráfrase e a técnica de investigação, três itens (de um total de 16) tiveram que ser adaptados para alcançar uma melhor compreensão. Duas dessas adaptações consistiram em substituir um conceito por outro mais utilizado no contexto chileno e outra modificação em relação à redação, uma vez que sua leitura era complexa para essa população. CONCLUSÕES Foi obtida uma versão em espanhol do questionário EFAS, que se mostrou compreensível e adaptado para uso em idosos chilenos.(AU)

[Translation and cultural adaptation of the Exercise Fear Avoidance Scale for Chilean older adults]. / Traducción y adaptación cultural del cuestionario Exercise Fear Avoidance Scale para su uso en adultos mayores chilenos.

OBJECTIVE: To translate and culturally adapt the Exercise Fear Avoidance Scale (EFAS) Into Spanish for Chilean older adults. MATERIALS AND METHODS: Double direct translation with harmonization, back translation and analysis of text comprehensibility through cognitive interviews. A sample of 20 older adults between the ages of 63 and 83 participated in the cognitive interview process. RESULTS: All items were assessed as clear and understandable. Using the paraphrasing and inquiry techniques, 3 items (out of 16) were adapted to achieve better understanding. Two of these adaptations consisted in replacing one concept with another, as the latter was more used in the Chilean context, and making a non-literal translation, since the literal one was too complex for the elderly to understand. CONCLUSIONS: A Spanish version of the EFAS was obtained, which proved to be understandable and adapted for its use with Chilean older adults.

OBJETIVO: Traducir y adaptar culturalmente el cuestionario Exercise Fear Avoidance Scale (EFAS) al español para su uso en adultos mayores chilenos. MATERIALES Y MÉTODOS: Doble traducción directa con armonización de versiones, retro-traducción y análisis de la comprensibilidad mediante entrevistas cognitivas. En el proceso de entrevistas cognitivas participaron 20 adultos mayores con edades comprendidas entre 63 y 83 años. RESULTADOS: Todos los ítems fueron evaluados como claros y comprensibles. Mediante la técnica de parafraseo e indagación 3 ítems (de un total de 16) se tuvieron que adaptar para lograr una mejor comprensión. Dos de estas adaptaciones consistieron en reemplazar un concepto por uno más utilizado en el contexto chileno y otra modificación fue en relación con la redacción, puesto que su lectura resultaba compleja para esta población. CONCLUSIONES: Se obtuvo una versión en español del cuestionario EFAS, la cual demostró ser comprensible y adaptada para su uso en adultos mayores chilenos.

Criterion-Referenced Fitness Standards Associated with Maintaining Functional Capacity in Chilean Older Adults.

The aim of the current study was to develop fitness standards associated with maintaining physical capacity in older adults at two different levels-that needed for advanced functioning and that needed for maintaining moderate (independent) functional ability. This was a cross-sectional study of 406 Chilean adults aged 60 and more. Functional capacity was measured through the Composite Physical Function (CPF) scale. A battery of validated fitness tests for this population was used. Based on the results of the CPF, two variables were created: "advanced physical capacity" (defined as those scoring 24 on the CPF scale) and "moderate (independent) physical capacity," defined as those scoring between 14 and 23 on the CPF scale. Fitness cut-off values were calculated for each of the two created variables to evaluate the risk of losing the independence through Receiver Operating Characteristic (ROC) curves analysis and logistic regression. The developed cut-off points provide important information for professionals working directly with older adults, to detect the risk of losing functionality and independence.

Validity of the International Fitness Scale "IFIS" in older adults.

OBJECTIVE: To validate the "International Fitness Scale" (IFIS) in older adults. METHODS: Firstly, cognitive interviews were performed to ensure that the questionnaire was comprehensive for older Chilean adults. After that, a transversal study of 401 institutionalized and non-institutionalized older adults from Maule region in Chile was conducted. A battery of validated fitness tests for this population was used in order to compare the responses obtained in the IFIS with the objectively measured fitness performance (back scratch, chair sit-and-reach, handgrip, 30-s chair stand, timed up-and-go and 6-min walking). RESULTS: Indicated that IFIS presented a high compliance in the comprehension of the items which defined it, and it was able of categorizing older adults according to their measured physical fitness levels. The analysis of covariance ANCOVA adjusted by sex and age showed a concordance between IFIS and the score in physical fitness tests. CONCLUSION: Based on the results of this study, IFIS questionnaire is a good alternative to assess physical fitness in older adults.

Associations between different components of fitness and fatness with academic performance in Chilean youths.

OBJECTIVES: To analyze the associations between different components of fitness and fatness with academic performance, adjusting the analysis by sex, age, socio-economic status, region and school type in a Chilean sample. METHODS: Data of fitness, fatness and academic performance was obtained from the Chilean System for the Assessment of Educational Quality test for eighth grade in 2011 and includes a sample of 18,746 subjects (49% females). Partial correlations adjusted by confounders were done to explore association between fitness and fatness components, and between the academic scores. Three unadjusted and adjusted linear regression models were done in order to analyze the associations of variables. RESULTS: Fatness has a negative association with academic performance when Body Mass Index (BMI) and Waist to Height Ratio (WHR) are assessed independently. When BMI and WHR are assessed jointly and adjusted by cofounders, WHR is more associated with academic performance than BMI, and only the association of WHR is positive. For fitness components, strength was the variable most associated with the academic performance. Cardiorespiratory capacity was not associated with academic performance if fatness and other fitness components are included in the model. CONCLUSIONS: Fitness and fatness are associated with academic performance. WHR and strength are more related with academic performance than BMI and cardiorespiratory capacity.

[Translation and cultural adaptation of the Composite Physical Function for its use in Chile]. / Traducción y adaptación cultural del cuestionario de independencia física Composite Physical Function para su uso en Chile.

UNLABELLED: Aging is directly related with loss of physical independency. Composite Physical Function questionnaire (CPF) assess, throw 12 items, a range of daily life activities in order to determine dependency levels in elderly. However, there is not a Spanish version of this instrument. AIM: To translate and culturally adapt the CPF to Spanish for its use in Chilean elderly. METHOD: Standardized international methodology was used in this study, which consisted in double direct translation to Spanish, harmonization of versions and back-translation to English. Acceptability and familiarity of the obtained version was analyzed using probing and paraphrasing methods using a sample of 20 older adults aged from 65 to 80 years old. RESULTS: All items were clear and understandable, although minor adaptations needed to be done in order to improve the understandability of two items. These adaptations consisted in adding information in brackets at the end of the sentence. CONCLUSION: Spanish version of the CPF questionnaire was obtained to its use in Chile. This questionnaire has been proved to be understandable and adapted to its use in Chilean older adults. Its ease of use makes this questionnaire potentially useful in future researches and surveys.

[ASSOCIATION BETWEEN HEALTH RELATED QUALITY OF LIFE, BODYWEIGHT STATUS (BMI) AND PHYSICAL ACTIVITY AND FITNESS LEVELS IN CHILEAN ADOLESCENTS]. / ASOCIACIÓN ENTRE LA CALIDAD DE VIDA RELACIONADA CON LA SALUD, EL ESTADO NUTRICIONAL (IMC) Y LOS NIVELES DE ACTIVIDAD FÍSICA Y CONDICIÓN FÍSICA EN ADOLESCENTES CHILENOS.

AIM: the objective of this study was to analyze the potential relationships between Health Related Quality of Life (HRQoL) with weight status, physical activity (PA) and fitness in Chilean adolescents in both, independent and combined analysis. METHOD: a sample of 767 participants (47.5% females) and aged between 12 and 18 (mean age 15.5) was employed. All measurements were carried out using selfreported instruments and Kidscreen-10, iPAQ and IFIS were used to assess HRQoL, PA and Fitness respectively. One factor ANOVA and linear regression models were applied to analyze associations between HRQoL, weight status, PA and fitness using age and sex as confounders. RESULTS: body mass index, level of PA and fitness were independently associated with HRQoL in Chilean adolescents. However, the combined and adjusted by sex and age analysis of these associations showed that only the fitness was significantly related with HRQoL. CONCLUSION: general fitness is associated with HRQoL independently of sex, age, bodyweight status and level of PA. The relationship between nutritional status and weekly PA with HRQoL are mediated by sex, age and general fitness.

Objetivos: el objetivo del presente estudio fue analizar las posibles relaciones entre la Calidad de Vida Relacionada con la Salud (CVRS) con el estado nutricional y los niveles de Actividad Física (AF) y Condición Física (CF) en adolescentes chilenos, de manera independiente e interactiva. Método: se utilizó una muestra de 767 participantes (47,5% chicas) con edades comprendidas entre los 12 y los 18 años de edad (edad media 15,5 años). Todas las medidas utilizadas se obtuvieron mediante instrumentos auto- administrados. Se utilizó el Kidscreen-10, iPAQ e IFIS para evaluar la CVRS, la AF y la CF, respectivamente. Se realizaron análisis de ANOVA de un factor y modelos de regresión lineal para analizar las asociaciones entre la CVRS, el estado nutricional, la AF y la CF utilizando la edad y el sexo como variables confusoras. Resultados: se ha encontrado una asociación independiente del Índice de Masa Corporal, el nivel de AF y de CF con el nivel de CVRS de adolescentes chilenos. Sin embargo, al analizar esta asociación de forma combinada y ajustada por sexo y edad tan solo el nivel de CF general se asocia de forma significativa con la CVRS. Conclusión: el nivel de CF general se asocia con la CVRS en adolescentes chilenos independientemente del sexo, la edad, el estado nutricional y el nivel de AF. La relación entre el estado nutricional y el nivel de AF semanal con la CVRS están mediadas por el sexo, la edad y el nivel de CF general.

Traducción y adaptación cultural del cuestionario de independencia física Composite Physical Function para su uso en Chile / Translation and cultural adaptation of the Composite Physical Function for its use in Chile

Aging is directly related with loss of physical independency. Composite Physical Function questionnaire (CPF) assess, throw 12 items, a range of daily life activities in order to determine dependency levels in elderly. However, there is not a Spanish version of this instrument. Aim: To translate and culturally adapt the CPF to Spanish for its use in Chilean elderly. Method: Standardized international methodology was used in this study, which consisted in double direct translation to Spanish, harmonization of versions and back-translation to English. Acceptability and familiarity of the obtained version was analyzed using probing and paraphrasing methods using a sample of 20 older adults aged from 65 to 80 years old. Results: All items were clear and understandable, although minor adaptations needed to be done in order to improve the understandability of two items. These adaptations consisted in adding information in brackets at the end of the sentence. Conclusion: Spanish version of the CPF questionnaire was obtained to its use in Chile. This questionnaire has been proved to be understandable and adapted to its use in Chilean older adults. Its ease of use makes this questionnaire potentially useful in future researches and surveys.

Physical Growth, Biological Age, and Nutritional Transitions of Adolescents Living at Moderate Altitudes in Peru.

BACKGROUND: Peru is experiencing a stage of nutritional transition where the principal characteristics are typical of countries undergoing development. OBJECTIVES: The objectives of this study were the following: (a) compare physical growth patterns with an international standard; (b) determine biological age; and (c) analyze the double nutritional burden of adolescents living at a moderate altitude in Peru. DESIGN: Weight, standing height, and sitting height were measured in 551 adolescents of both sexes (12.0 to 17.9 years old) from an urban area of Arequipa, Peru (2328 m). Physical growth was compared with the international standard of the CDC-2000. Biological age was determined by using a non-invasive transversal technique based on years from age at peak height velocity (APHV). Nutritional state was determined by means of weight for age and height for age. Z scores were calculated using international standards from the CDC-2000. RESULTS: Body weight for both sexes was similar to the CDC-2000 international standards. At all ages, the girls' height (p < 0.05) was below the standards. However, the boys' height (p < 0.05) was less at ages, 15, 16, and 17. Biological age showed up in girls at age 12.7 years and for boys at 15.2 years. Stunted growth (8.7% boys and 18.0% girls) and over weight (11.3% boys and 8.8% girls) occurred in both groups. A relationship existed in both sexes between the categories of weight for the age and stunted growth by sex. CONCLUSIONS: Adolescents living at a moderate altitude exhibited stunted linear growth and biological maturation. Furthermore, adolescents of both sexes showed the presence of the double nutritional burden (stunted growth and excessive weight).

[Association between dietary habits and the presence of overweight/obesity in a sample of 21,385 chilean adolescents]. / ASOCIACIÓN ENTRE LOS HÁBITOS DIETÉTICOS Y LA PRESENCIA DE SOBREPESO/OBESIDAD EN UNA MUESTRA DE 21.385 ADOLESCENTES CHILENOS.

AIM: The main aim of the present study was to explore the potential associations between dietary habits and the presence of overweight and obesity in Chilean adolescents. METHODS: For the present study dietary habits of 21,385 Chilean students were analyzed and weight and height assessed, in order to determine potential associations between eating patterns and body mass index (BMI) values. RESULTS: The majority of participants have lunch and a snack in the afternoon every day a week (81% and 71.2%, respectively), although only a 59.5% have breakfast every day and a 22% have dinner every night. To have breakfast is common for thin and normal weight subjects, but only a half of overweight and obese individuals usually have it. The obese is the group having less dairy products. A 50.2% of all subjects have legumes once or never in a week. Around a 15% have sweets all days and nearly a 50% of all the participants consume fizzy drinks every day of the week. Interestingly, having breakfast was found to be associated with less truancy. CONCLUSIONS: Nutritional education strategies should be carried out within students in Chile, since inadequate dietary habits are related to the higher values of BMI.

Objetivos: El principal objetivo del presente trabajo fue evaluar las posibles asociaciones entre los hábitos dietéticos y la presencia de sobrepeso y obesidad en adolescentes Chilenos. Método: Para este trabajo se analizaron los hábitos dietéticos de 21.385 estudiantes Chilenos y se determinaron el peso y la talla, con el fin de explorar posibles asociaciones entre los patrones de alimentación y los valores de índice de masa corporal (IMC). Resultados: La mayoría de los participantes realiza la toma del almuerzo (81%) y de la merienda (71,2%) todos los días de la semana. Sólo el 59,5% de los encuestados toma desayuno cada día y un 22% cena todas las noches. Desayunar es común entre los sujetos delgados y con peso normal, pero únicamente la mitad de los individuos con sobrepeso u obesidad desayuna habitualmente. Los obesos son el grupo que consume menos productos lácteos. Un 50,2% de todos los participantes nunca toma legumbres o lo hace una vez por semana. En torno a un 15% toma dulces todos los días y casi la mitad de los encuestados ingiere bebidas carbonatadas cada día de la semana. Además, tomar desayuno de forma habitual se asoció inversamente con el absentismo escolar. Conclusión: Se necesitan llevar a cabo estrategias de educación nutricional entre los estudiantes chilenos, ya que los hábitos dietéticos inadecuados se encuentran asociados con valores más elevados de IMC.

[Waist-height ratio and risk of metabolic syndrome in Chilean adolescent]. / Ratio cintura-estatura y riesgo de síndrome metabólico en adolescentes chilenos.

OBJECTIVES: the aims of this study are twofold: i) to analyze the prevalence of risk of Metabolic Syndrome (MS) using the waist to height ratio (WHR) in a national representative sample of Chilean adolescents; and ii) to obtain percentile tables of WHR by sex and age for this population. METHODS: cross-sectional study with a sample of 23180 adolescents (boys n=11253; girls n=11927) from 13 to 16 years old. It was obtained anthropometric measures of height, weight and waist circumference. Risk of MS was calculated by the WHR with a cutoff of 0.5. Prevalence for risk of MS was calculated for all Chilean regions. Percentile table of WHR was calculated for this population. RESULTS: participants who had a WHR higher than 0.5 was 22.4%. This prevalence was higher in the most extreme regions (both north and south). Girls aged 15 and 16 showed higher WHR than boys. Results of this study shows higher values in WHR than published in previous international studies. CONCLUSION: It has been calculated the risk of MS for Chilean adolescents using WHR and it is associated to sex and region. Additionally percentile tables of WHR for Chilean adolescents aged 13 to 16 have been calculated.

Objetivos: El propósito de este estudio fue: i)analizar la prevalencia del riesgo de sufrir Síndrome Metabólico (SM) mediante la Relación Cintura-Estatura (RCE) en una muestra de adolescentes chilenos representativa a nivel nacional; y ii) obtener tablas de percentiles de la RCE por sexo y edad para esta población. Métodos: estudio transversal con una muestra de 23.180 adolescentes (chicos n= 11.253; chicas n= 11.927) de 13 a 16 años. Se llevaron a cabo medidas antropométricas de altura, peso y perímetro de cintura. El riesgo de sufrir SM se calculó mediante la RCE estableciendo el punto de corte en 0,5 y se obtuvo su prevalencia para todas las regiones chilenas. Se calcularon los percentiles de la RCE para esta población. Resultados: El 22,4% de los participantes mostraron una RCE superior a 0,5 siendo el riesgo la prevalencia de sufrir SM más elevada en las regiones extremas del país (norte y sur). Las chicas de 15 y 16 años mostraron valores de RCE superior a los chicos. Los resultados obtenidos muestran valores de RCE superiores a los publicados en otros estudios a nivel internacional. Conclusión: Se ha determinado el riesgo de sufrir SM en adolescentes chilenos a partir de la RCE, estando éste asociado al sexo y la región donde se vive. Adicionalmente se han obtenido los percentiles de RCE para los jóvenes chilenos de 13 a 16 años en una muestra representativa a nivel nacional.

Influence of parents and physical education teachers in adolescent physical activity.

The objective of this study was to analyze the influence of parents and Physical Education teachers on adolescent's extracurricular Physical Activity. Data were obtained from the Chilean System for the Assessment of Educational Quality test with a large representative sample of 23,180 students (11,927 females and 11,253 males aged 13.7 and 13.8 years respectively). The analyzed variables were the extracurricular physical activity of adolescents, parents' and physical education teachers' encouragement to do physical activity and parents' physical activity behavior. Associations between variables were analyzed using chi-squared tests. Two logistic regression models, one adjusted and the other unadjusted, were performed for each physical activity variable (vigorous, moderate, mild and total) in order to obtain odds ratios from parents' and physical education teachers' influence variables. Results showed that parents' influence is more relevant than physical education teachers' influence in order to promote physical activity in adolescents, regardless of age, sex and physical condition.

El objetivo del estudio fue analizar la influencia de los padres y los profesores de Educación Física en la Actividad Física extracurricular de los adolescentes. Los datos fueron obtenidos del Sistema Chileno de Medición de la Calidad de Educación, en una muestra representativa de 23,180 estudiantes (11,927 niñas y 11,253 niños, con una edad media de 13,7 y 13,8 años). Las variables analizadas fueron la Actividad Física extracurricular de los adolescentes, la influencia que ejercían los padres y los profesores de Educación Física para que realicen Actividad Física y la Actividad Física de los padres. Se analizó la asociación entre las variables a través del chi-cuadrado. Dos regresiones logísticas, con y sin ajuste del modelo, fueron realizadas para cada nivel de la Actividad Física (vigorosa, media, baja y total) con el objetivo de obtener los Odds Ratios de las variables relativas a la experiencia de los padres y los profesores de Educación Física. Los resultados muestran que la influencia de los padres es más relevante que la de los profesores de Educación Física a la hora de promover la Actividad Física en los adolescentes, independientemente de la edad, el género o la condición física.