The objective of the study was to verify whether (FFM), maturity status (MS) and chronological age (CA) are determinants of physical fitness performance, and to analyze FFM and physical performance aligned by CA and MS in children and adolescents. A descriptive correlational study was carried out in 863 schoolchildren. Weight, height, and waist circumference (WC) were evaluated. Body mass index (BMI), FFM, fat mass (FM), MS (Age at peak height velocity, APHV) were calculated. The physical tests of velocity 20 m, agility 5 m x 10rep, and horizontal jump (HJ) were evaluated. The APHV was estimated in boys at 14.0 ± 0.36APHV and in girls at 11.96 ± 0.49APHV. The relationships between CA and APHV with FFM was r = 0.80 in boys and r = 0.44 to 0.45 in girls. The relationships between FFM and physical tests in boys were [HJ (r = 0.70), agility 5m x 10rep (r = -0.68), velocity (r = -0.61)] and in girls [HJ (r = 0.42), agility 5m x 10rep (r = -0.52), velocity (r = -0.20)]. The differences in FFM and physical fitness tests were more pronounced when aligned by APHV than by CA. It was verified that both FFM, CA, and APHV are determinants of physical fitness performance. In addition, the APHV should be introduced in physical education as a means of ranking physical performance among schoolchildren.

Healthy ageing means optimizing opportunities that allow older individuals to participate actively in society without discrimination. Learning adaptive behaviors (AB) may be extremely important for individuals for all stages of life. The goal of this study was: (a) to create a scale for self-perceived adaptive behavior, and (b) propose percentiles for evaluating AB in older adult women. A self-perception scale was created to measure adaptive behavior. Anthropometric and physical fitness variables for 192 older Chilean women (ages 60 to 88) were collected and evaluated. Content validity reflected agreement from 0.75 to 1.0. Construct validity carried out with exploratory factor analysis (EFA) resulted in 11 dimensions with 62 items in groups. Saturation oscillated between 0.62 and 0.85 with the explanation of variation as 46.27%. Cronbach’s Alpha was r = 0.83. The results indicated that the scale developed was valid and reliable for the Chilean women studied. This scale may be used to measure self-perception of AB patterns in older women. Furthermore, the percentiles allow for classification of the AB by age and anthropometric indices.

Aim: To analyze the association of social and personal influence on the practice of physical activity according to gender and age in high school students of the commune of Talca-Chile. Methods: Cross-sectional quantitative study, 744 schoolchildren (X=15.11 years; 459 males (28.81%) and 285 females (15.22%)). The IPAQ and the questionnaire of influences on Physical Activity and Health were applied. Results: Men are more influenced by parents in the motivations and social support to talk and do physical activity (61.4%) and in women, the influence is greater from school. Personal interest is the most relevant influence at the level of motivation; however, it is also recognized as one of the negative influences on physical activity. The reasons for low regular physical activity are lack of free time, personal interest and lack of motivation. Conclusion: Gender is associated with personal and social influence to practice physical activity, and age is inversely associated with social influence to talk, number of times of physical activity with friends and reasons for not doing physical activity.

The objectives of this study were to characterize the bibliometric indicators of scientific productivity on adaptive behavior (AB) in children and adolescents with autism spectrum disorders (ASD) during the year 2021. The PubMed database was used to summarize information from quantitative scientific articles (cross-sectional, longitudinal and experimental) and reviews (bibliographic, systematic review and meta-analysis). The data collected for each of the articles were: year of publication, journal name, country, language of publication and type of published document (cross-sectional study, longitudinal, experimental, biographical review, systematic review and meta-analysis). The United States (USA) published more articles than any other country in the world (n = 28), followed by Italy with 13 studies, China and Spain with six studies. A total of 44 scientific journals were identified that have published a total of 89 scientific articles related to AB in children and adolescents with ASD. Regarding the type of published paper, 63 quantitative studies were identified (cross-sectional studies, 9 longitudinal studies, 15 experimental studies). In addition, 14 literature reviews, 9 systematic reviews, and 3 systematic reviews/meta-analyses were identified. These results suggest practitioners and researchers to address and decide where to read and publish scientific articles related to AB in youth with ASD

Objetivos: Analizar la relación de la fuerza de prensión manual FPM con el Flujo espiratorio Máximo FEM y verificar como estos parámetros en conjunto pueden contribuir sobre la salud ósea en niños y adolescentes. Metodología: Se efectuó un estudio descriptivo (correlacional). Se estudió de forma probabilística a 253 niños y adolescentes (134 hombres y 119 mujeres). El rango de edad fue de 6,0 hasta 15,0 años. Se evaluó el peso, la estatura de pie, estatura sentada, longitud del antebrazo derecho, el diámetro del fémur derecho, la fuerza de prensión manual FPM derecha e izquierda y el flujo espiratorio máximo FEM. Se calculó la densidad mineral ósea DMO y el contenido mineral óseo CMO por medio de ecuaciones de regresión antropométrica. Resultados: Se observó correlaciones positivas entre FPM con el FEM en ambos sexos (R2adjust = 30 a 37%). La FPM de forma individual explica la DMO y el CMO entre 58 a 69%, mientras que el FEM entre 35 a 42%. Ambas variables en conjunto (FPM derecha e izquierda + FEM) explican la DMO y el CMO entre 67 a 68%. Conclusión: Se observó correlaciones positivas entre la FPM y FEM en escolares de ambos sexos. Ambos variables son determinantes para predecir la salud ósea de niños y adolescentes. Estos resultados sugieren que ambos parámetros pueden servir como indicadores de aptitud funcional para identificar la fragilidad ósea entre niños y adolescentes. Objectives: To analyze the relationship between manual grasping force (FPM) and Maximum expiratory flow (FEM), and to verify how these parameters together can contribute to bone health in children and adolescents. Methodology: A descriptive (correlational) study was carried out. A total of 253 children and adolescents (134 boys and 119 girls) were selected probabilistically. The age range is 6.0 to 15.0 years old. Weight, standing height, sitting height, right forearm length, right biepicondylar femur diameter, right and left FPM, and peak FEM were evaluated. Bone mineral density (BMD) and bone mineral content (CMD) were calculated by means of anthropometric regression equations. Results: Positive correlations were observed between FPM and FEM in both sexes (R2adjust = 30 to 37%). FPM individually explains BMD and CMD by 58% to 69%, while FEM by 35% to 42%. Both variables together (right and left FPM + FEM) explain BMD and CMD by 67% to 68%. Conclusion: Positive correlations were observed between FPM and FEM in schoolchildren of both sexes. Both variables are determinant to predict children's and adolescents' bone health. These results suggest that both parameters can serve as indicators of functional aptitude to identify bone fragility among children and adolescents.

The aim of this study was to compare bibliometric indicators of scientific productivity in physical activity (PA) in children and adolescents with Autism spectrum disorder (ASD) and Down syndrome (DS) in the PubMed database. A bibliometric study was conducted for the last 5 years (2017 to 2021). The data collected for each article were: year of publication, language of publication, country, journal name, and type of paper. The results showed that there was higher scientific productivity in the population with DS (20 studies) relative to their counterparts with ASD (31 studies). The language of publication in both cases was English. There were 10 countries that published on PA in ASD and 14 countries that published on DS. Overall, the greatest interest in publishing on PA in children and adolescents with ASD was in North America (6 studies), followed by Asia (5 studies) and Europe (4 studies). In the DS population it was in Europe (13 studies), North America (9 studies) and South America (4 studies). Nineteen journals were identified that published in the ASD population and 29 journals in DS. Six experimental studies were identified in ASD and 7 in DS. There was a higher scientific productivity with original studies. There was a positive trend of increasing scientific productivity over the years in both populations. We suggest the need to promote research on PA in both populations, regardless of the type of study, as it is an indicator of overall health status.