El presente artículo tiene como objetivo comprender el significado del periodo formativo práctica profesional, que vivenciaron estudiantes de la carrera de pedagogía en Educación Física de dos universidades regionales ubicadas en la región del Maule, Chile, durante la pandemia Covid-19 en el primer semestre del año 2020. Desde el punto de vista metodológico, el estudio se instala en la perspectiva interpretativa-cualitativa, de tal manera que se realizaron tres grupos focales y seis entrevistas en profundidad a un total de 34 estudiantes en proceso de práctica profesional. Las entrevistas grupales e individuales se realizaron vía Zoom producto de las restricciones de la autoridad sanitaria. Los resultados dan cuenta de un escaso contacto con los estudiantes de los establecimientos educacionales, utilización de redes sociales como estrategias de enseñanza, y un impacto negativo en los niveles motivacionales producto de la enseñanza virtual, cuestiones que emergen a partir de los procesos reflexivos y de autoaprendizaje de los estudiantes en formación. Estas reflexiones, se sugiere sean consideradas en los procesos de formación inicial, en consideración a la relevancia de la práctica profesional en la construcción del ethos docente, por parte de futuros profesores de Educación Física. This article aims at understanding the meaning of the professional curricular internship period experienced by physical education trainees of two regional universities located in the Maule Region, Chile, during the Covid-19 pandemic in the first semester 2020. From the methodological standpoint, the study takes an interpretive-qualitative stance, hence three focus groups were organized and six in-depth interviews were conducted totalling 34 students in the process of professional curricular internship. The group and individual interviews were carried out via Zoom due to the health authority restrictions. The results show scarce contact with the students in the educational establishments, scarce use of social networks as teaching strategies, and a negative impact on motivational levels resulting from virtual teaching. The aforementioned issues emerge from the reflective processes and self-learning of the trainees. This study suggests pondering these reflections in the initial teaching training processes taking into account the relevance of the professional curricular internship in the construction of the teaching ethos of future Physical Education teachers.

The objective was to analyze anthropometric and physical performance variables as a function of chronological age and biological maturity in young Chilean tennis players. The study was observational, cross-sectional, with descriptive and analytical characteristics. Eighty-seven tennis players were evaluated (58 men 15.1 ± 0.8 years and 29 women, 15.3 ± 0.8 years). The measured anthropometric variables were a sprint test of 20m; a modified agility test; a sit-and-reach test and shoulder flexibility; manual grip strength; horizontal jump in feet; a medicine ball throw; a countermovement vertical jump; an abalakov vertical jump and a 20-m shuttle-run test. The growth velocity acceleration peak (APHV), skeletal muscle mass and fat mass were calculated, R² and standard error of estimate (SEE) were examined. The results show that chronological age explained the anthropometric variables between 1 and 23% in men and 1 and 29% in women; by biological age, variables were explained between 3 and 53% in men and 2 and 42% in women. Of the physical performance variables, chronological age described between 2 and 24% of them in men and 1 and 29% in women; the same were explained by biological age between 1 and 19% in men and 1 and 26% in women. We conclude that anthropometric variables showed a better relationship with biological age, except for volume of fat tissue, while physical performance variables showed low association with both biological and chronological age.

La condición física corresponde a la capacidad fisiológica para realizar actividades de la vida diaria con normalidad, de manera segura, independiente, sin fatiga excesiva y que depende de la indemnidad de aptitudes físicas, tales como; fuerza, resistencia aeróbica, flexibilidad, agilidad y equilibrio dinámico⁸. El déficit en los componentes de la condición física han sido vinculados con discapacidad, mayor riesgo de caídas, fracturas y disminución en la calidad de vida^9,10.

Introduction: Physical activity is important for achieving healthy aging. Objective: To analyze changes in anthropometric parameters and physical fitness among Chilean older adults after participating in a 16-week physical activity program and to evaluate whether there were differences in relation to their baseline nutritional status or not. Materials and methods: Pre-experimental quantitative study. The study population consisted of 176 older adults (155 women and 21 men) distributed in three groups: normal weight (n=56), overweight (n=67) and obese (n=53). The following variables were evaluated: body mass index (BMI), waist circumference (WC), waist-to-height ratio (WHR) and physical fitness. Results: Significant decreases between pre- and post-measurements were found for WC (p<0.001), BMI (p=0.015), and WHR (p<0.001). Improvements were observed in the following tests: chair stand (p<0.001), arm curl (p<0.001), 2-min step (p<0.001), chair sit-&-reach (p=0.018) and back scratch (p=0.014). Regarding BMI, significant changes were observed between normal weight vs. overweight participants (p=0.001) and between normal weight vs. obese participants (p=0.001). Conclusion: Older adult participants that regularly attended the physical activity program were able to reduce their WC, BMI and WHR, and also improved their physical-functional performance on the chair stand, arm curl, 2-min step, chair sit-&-reach and back scratch tests. In addition, anthropometric parameters and physical fitness also improved regardless of their baseline nutritional status.

This study protocol aims to analyze and compare the effects of combined movement and storytelling intervention (CMSI) on fundamental motor skills (locomotor skills and object control), language development (language comprehension, language expression, vocabulary and language description), and physical activity levels (light intensity, moderate-to-vigorous intensity and sedentary time) in children aged 3 to 6 years. The sample will consist of 144 children from 12 class groups, randomly assigned to 3 experimental groups (n = 72 children) and 3 control groups (n = 72 children), belonging to 4 class groups of upper-middle-level classes (2 experimental and 2 control; 3 to 4 years), 4 transition level 1 classes (2 experimental and 2 control; 4 to 5 years) and 4 transition level 2 classes (2 experimental and 2 control; 5 to 6 years). The experimental groups will perform CMSI for 3 sessions per week (40 min per session) over 12 weeks (using one motor story per week), while the control groups will not receive any treatment. The main outcome will provide information about fundamental motor skills, language development, and physical activity levels. Our hypothesis indicates that CMSI has the potential to generate significant increases in selected assessments. If this intervention proves to be beneficial, it could contribute to preschool and school curricula.

Esta investigación tuvo como objetivo analizar la relación entre el sprint de 5 m con la composición corporal, maduración biológica e indicadores antropométricos en hombres jóvenes tenistas. El estudio fue correlacional y de corte transversal con la participación de 35 jóvenes tenistas hombres (15±0.5 años) de nacionalidad chilena, seleccionados de manera no probabilística por accesibilidad. Se midió el sprint de 5 m en las canchas de tenis y se registraron variables antropométricas como masa corporal, talla, perímetros corporales (brazo, muslo y pierna) y pliegues cutáneos (tríceps, muslo anterior y pierna medial). Se calcularon el pico de aceleración de la velocidad de crecimiento (APVC), el porcentaje de grasa corporal (GC) y la masa muscular esquelética (MME). Los resultados evidenciaron que el sprint de 5 m se asoció principalmente con el pliegue de la pierna medial (R2=24%; p˂0.01) y el GC (R2=13%; p˂0.05). Además, se encontró que un incremento en estos indicadores de adiposidad se relaciona con un mayor tiempo en el sprint de 5 m (β= 0.02; 0.04 s, respectivamente). Sin embargo, la masa corporal, la talla, el APVC y la MME mostraron una relación baja con el sprint 5 m (p>0.05). En conclusión, el sprint de 5 m muestra mayor asociación con indicadores de adiposidad, principalmente con el pliegue de la pierna medial y el GC. Adicionalmente, mejores niveles en estos indicadores se asocian con un menor tiempo en el sprint de 5 m. Palabras clave: composición corporal; antropometría; rendimiento físico; maduración; adolescentes; tenis. The research aimed to analyze the relationship between the 5m sprint with body composition, biological maturation, and anthropometric indicators in young male tennis players. The study utilized a correlational cross-sectional design with the participation of 35 male young tennis players (15±0.5 years old) of Chilean nationality, selected through non-probabilistic convenience sampling. The 5m sprint was measured on tennis courts, and anthropometric variables such as weight, height, body circumferences (arm, thigh, and leg), and skinfolds (triceps, anterior thigh, and medial leg) were recorded. Peak height velocity (APVC), body fat percentage (GC), and skeletal muscle mass (MME) were calculated. The results showed that the 5m sprint was primarily associated with the medial leg skinfold (R2=24%; p<0.01) and GC (R2=13%; p0.05). In conclusion, the 5m sprint shows greater association with adiposity indicators, mainly with the medial leg crease and GC. Additionally, better levels in these indicators are associated with a shorter time in the 5m sprint. Key words: body composition; anthropometry; physical performance; maturation; young boys; tennis.