Muscular development and physical activity as major determinants of femoral bone mass acquisition during growth

[EN] OBJECTIVES: To investigate to what extent bone mass accrual is determined by physical activity and changes in lean, fat, and total body mass during growth. METHODS: Twenty six physically active and 16 age matched control boys were followed up for three years. All subjects were prepubertal at the start of the survey (mean (SEM) age 9.4 (0.3) years). The weekly physical activity of the active boys included compulsory physical education sessions (80-90 minutes a week), three hours a week of extracurricular sports participation, and occasional sports competitions at weekends. The physical activity of the control group was limited to the compulsory physical education curriculum. Bone mineral content (BMC) and areal density (BMD), lean mass, and fat mass were measured by dual energy x ray absorptiometry. RESULTS: The effect of sports participation on femoral bone mass accrual was remarkable. Femoral BMC and BMD increased twice as much in the active group as in the controls over the three year period (p < 0.05). The greatest correlation was found between the increment in femoral bone mass and the increment in lean mass (BMC r = 0.67 and BMD r = 0.69, both p < 0.001). Multiple regression analysis revealed enhancement in lean mass as the best predictor of the increment in femoral bone BMC (R = 0.65) and BMD (R = 0.69). CONCLUSIONS: Long term sports participation during early adolescence results in greater accrual of bone mass. Enhancement of lean mass seems to be the best predictor of this bone mass accumulation. However, for a given muscle mass, a greater level of physical activity is associated with greater bone mass and density in peripubertal boys.

La evaluación del Trabajo Fin de Grado a través de la rúbrica

[ES] En el área de Ciencias Sociales en la actualidad, dada la situación novedosa y compleja de la evaluación de la asignatura Trabajo Fin de Grado (TFG), se precisa de nuevos modelos que orienten a los diferentes agentes que tendrán que desarrollar la evaluación: tutores, miembros del tribunal, etc. El objetivo en este artículo es presentar una propuesta de evaluación alternativa que oriente a los tutores en la valoración de las competencias transversales de los TFG de las titulaciones de Educación Infantil y Primaria a través de la rúbrica. Presentamos el proceso de diseño que hemos seguido en dos rúbricas para establecer su calidad. Las orientaciones que ofrecemos han surgido de una revisión de la literatura existente y de un trabajo de campo. [EN] The Final Year Project, a new compulsory subject linked to Social Sciences, has been recently introduced in the Spanish University Degrees. Given its novelty and the difficulties its assessment entails, those agents, involved in evaluating the students’ perform ance on this subject (e.g. supervisors, members of the assessment committee), need a fresh set of guidelines to assist their work. In order to meet this need in the Degrees of Preschool and Primary Education, our objective in this paper is to propose an alternative assessment model to help supervisors judge the TFGs by means of a rubric, and we offer two examples of this instrument. These assessment tools have been adapted for the TFGs where students specifically carry out a bibliographic review. The guidelines that we suggest here are the result of both the revision of existing research and fieldwork.

El aula de múscia: múltiples realidades superpuestas

[ES] En el área de Ciencias Sociales en la actualidad, dada la situación novedosa y compleja de la evaluación de la asignatura Trabajo Fin de Grado (TFG), se precisa de nuevos modelos que orienten a los diferentes agentes que tendrán que desarrollar la evaluación: tutores, miembros del tribunal, etc. El objetivo en este artículo es presentar una propuesta de evaluación alternativa que oriente a los tutores en la valoración de las competencias transversales de los TFG de las titulaciones de Educación Infantil y Primaria a través de la rúbrica. Presentamos el proceso de diseño que hemos seguido en dos rúbricas para establecer su calidad. Las orientaciones que ofrecemos han surgido de una revisión de la literatura existente y de un trabajo de campo. [EN] The Final Year Project, a new compulsory subject linked to Social Sciences, has been recently introduced in the Spanish University Degrees. Given its novelty and the difficulties its assessment entails, those agents, involved in evaluating the students’ performa ce on this subject (e.g. supervisors, members of the assessment committee), need a fresh set of guidelines to assist their work. In order to meet this need in the Degrees of Preschool and Primary Education, our objective in this paper is to propose an alternative assessment model to help supervisors judge the TFGs by means of a rubric, and we offer two examples of this instrument. These assessment tools have been adapted for the TFGs where students specifically carry out a bibliographic review. The guidelines that we suggest here are the result of both the revision of existing research and fieldwork.