Developing more accurate assessments of physical activity (PA) and sedentary behavior (SB) is an important public health\nresearch priority. Assessing PA and SB is challenging in all segments of the population, but it is especially difficult in children\ndue to cognitive limitations and more sporadic and intermittent activity patterns. Moreover, they are influenced by several factors\nincluding temporal-spatial constraints and social conditions. To accurately assess PA and SB, it is essential to clearly define methods\nfor describing all these factors. The goal of this paper is to potentiate advances in the field by proposing a base ontology for\ncharacterizing physical activity, sedentary behavior, and the context in which it occurs. The ontology would establish a flexible\nbase language to facilitate standardized descriptions of these behaviors for researchers and public health professionals.
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