Resumen El objetivo es exponer las representaciones sociales a partir de la información, el campo de representación y las actitudes sobre la profesión de la educación física y deporte que comparten educadores físicos en formación de la Universidad de Colima, México. El estudio es de carácter descriptivo y, para la indagación empírica, se utilizó un cuestionario semiestructurado que se aplicó a 166 estudiantes mediante la plataforma de Google Forms. Los resultados señalan que la información que poseen los estudiantes sobre la profesión proviene de los medios digitales, la familia, los amigos y conocidos cercanos, y gira en torno a las características del educador físico y perfiles laborales. También se determina que el campo de representación abarca cinco imágenes de la profesión: fácil y desacreditada; alta vocación inicial; perfil de deportista y docente; entusiastas, versátiles, apasionados y comprometidos; y agentes sociales en salud, bienestar físico y valores. Respecto de las actitudes, se revela una inclinación positiva, ya que existe una vinculación directa entre la vocación por esta disciplina y los intereses personales en el camino laboral que desean tomar. Se concluye que la profesión de la educación física y deporte está subvalorada socialmente; no obstante, los estudiantes perfilan imágenes y actitudes positivas acerca de la formación y el ámbito laboral.

Abstract The text is aimed to expound the social representations, from the information, field of representation and attitudes regarding the physical education and sports profession which are shared by physical educators in training at the University of Colima, Mexico. Is a descriptive study. For the empirical inquiry, a semi-structured questionnaire was applied to 166 students through Google Forms platform. Results of the information students possess regarding the profession derives from digital means, family, friends, and acquaintances, and mainly revolves on the physical educator’s characteristics and job profiles. Also, it is possible to determine that the field of representation includes five views of the profession: easy and discreditable; initial high vocation; athlete and teacher profile; enthusiastic, versatile, passionate, and committed; and social agents in health, physical well-being and values. Regarding attitudes, the results reveal a positive inclination, whereas there is a direct link between the vocation they have for this discipline and their personal interests in the career path they wish to take. It is concluded that physical education and sports profession is socially undervalued, but students have positive views and attitudes in the context of training and job field.

Introduction: The analysis of body composition through direct and indirect methods allows the study of the various components of the human body, becoming the central hub for assessing nutritional status. Objective: The objective of the study was to develop equations for predicting body fat% from circumferential body arm, waist and calf and propose percentiles to diagnose the nutritional status of school children of both sexes aged 4-10 years. Methods: We selected intentionally (non-probabilistic) 515 children, 261 children and 254 being girls belonging to Program interaction and development of children and adolescents from the State University of Campinas (Sao Paulo, Brazil). Anthropometric variables were evaluated for weight, height, triceps and subscapular skinfolds and body circumferences of arm, waist and calf, and the% fat determined by the equation proposed by Boileau, Lohman and Slaughter (1985). Through regression method 2 were generated equations to predict the percentage of fat from the body circumferences, the equations 1 and 2 were validated by cross validation method. Results: The equations showed high predictive values ranging with a R² = 64-69%. In cross validation between the criterion and the regression equation proposed no significant difference (p > 0.05) and there was a high level of agreement to a 95% CI. Conclusion: It is concluded that the proposals are validated and shown as an alternative to assess the percentage of fat in school children of both sexes aged 4-10 years in the region of Campinas, SP (Brazil).

Introducción: El análisis de la composición corporal a través de métodos directos e indirectos permite el estudio de los distintos componentes del cuerpo humano, constituyéndose en el eje central para valorar el estado nutricional. Objetivo: Desarrollar ecuaciones de predicción del % de grasa corporal a partir de circunferenciales corporales del brazo, cintura y pantorrilla y proponer percentiles para diagnosticar el estado nutricional de niños escolares de ambos sexos de 4-10 años. Métodos: Fueron seleccionados de forma intencional (no-probabilística) 515 niños, siendo 261 niños y 254 niñas pertenecientes al Programa de interacción y desarrollo del niño y del adolescente de la Universidad Estatal de Campinas (Sao Paulo, Brasil). Se evaluó las variables antropométricas de peso, estatura, pliegues cutáneos tricipital y subescapular y las circunferencias corporales del brazo, cintura y pantorrilla. Se determino el % de grasa a través de la ecuación propuesta por Boileau, Lohman y Slaughter (1985). A través del método de regresión se generaron 2 ecuaciones para predecir el porcentaje de grasa a partir de las circunferencias corporales; las ecuaciones 1 y 2 fueron validadas a través del método de validación cruzada. Resultados: Las ecuaciones obtenidas mostraron altos valores predictivos, oscilando con un R²= 64-69%. En la validación cruzada entre el criterio y las ecuaciones de regresión propuestas no hubo diferencias significativas (p < 0,05) y se observó un alto grado de concordancia a un CI 95%. Conclusión: Las ecuaciones son validadas y son una alternativa para evaluar el porcentaje de grasa en niños escolares de ambos sexos de 4-10 años del Programa de interacción y desarrollo del niño y del adolescente de la Universidad Es tatal de Campinas (Sao Paulo, Brasil).

Background: The lack of catch up growth (CUG) in small for gestational age (SGA) children may be related to a reduced sensitivity to insulin growth factor 1 (IGF-I). Aim: To assess the sensitivity to IGF-I in small for gestational age children, measuring basal and post IGF-I nocturnal profile of growth hormone (GH). Patients and methods: We studied 34 prepubertal SGA children aged 4 to 11 years. Twenty three had CUG and 11 did not have CUG. As an IGF-I sensitivity test, nocturnal GH levels were measured every 20 minutes from 23:00 h to 07:00 h, both under baseline conditions and after the administration of a subcutaneous bolus of 1 mg/kg/body weight of the IGF-I + IGFBP-3 complex (Somatokine®). Results: At the time of the study, the Z scores for height among children with and without CUG were -1.55 ± 0.22 and -3.24 ± 0.28, respectively (p <0.0001). There were no statistical differences between CUG + vs CUG- patients in mean basal GH (6.6 ± 0.5 and 5.6 ± 0.6 ng/ml, respectively). After Somatokine® administration, mean GH, and the mean GH area under the curve (AUC) decreased significantly in both groups. However, mean overnight GH AUC decreased in all SGA children with CUG, after Somatokine® administration, whereas 3 out of 11 SGA children without CUG had an increase in their mean GH AUC in response to Somatokine®. Conclusions: These findings suggest that pituitary sensitivity to IGF-I may be decreased in some SGA children without CUG

Foi determinada, no sul do Chile, a prevalência de espécies termotolerantes de Campylobacter e seus biotipos, em crianças normais e diarréicas, bem como em cães e aves domésticas. Campylobacter foi isolado em 34,5% do total das amostras estudadas sendo sua frequência de isolamento de 16,3% e 6,4% nas crianças com diarréia e normais, respectivamente. C. jejuni foi a espécie mais freqüente. Porém, C. coli foi isolado em 29% das crianças com diarréia. Somente os biotipos I e II, tanto de C. jejuni como de C. coli, foram isolados das crianças, os quais foram também os mais frequentemente encontrados nos animais, sugerindo uma possível associação epidemiológica entre eles

The prevalence of thermotolerant Campylobacter in diarrhoeic and healthy children as well as in dogs, hens, ducks and pigeons was determined in Southern Chile. Campylobacter were found in 34.5% of the faecal samples examined. The isolation rate of Campylobacter in diarrhoeic and healthy children was 16.3% and 6.4% respectively. Despite C.jejuni was always more frequent than C. coli, the latter was isolated with a high frequency (29%) from patients with diarrhoea. C.jejuni and C. coli biotypes I and II were found in healthy and diarrhoeic children and were predominant in all the animals species studied. This may point out towards the possible origin of strains infecting children.