Patrones, fraccionamiento y directrices de la actividad físicala relevancia de la actividad física escolar sobre el consumo máximo de oxígeno

Resum

The overall aim of this Doctoral Thesis was to describe physical activity levels and different bouts during several school-based activities (recess time and physical education), and out-of-school activities, and also analyze associations among physical activities intensities and maximum oxygen uptake among 668 elementary and secondary school students. GT3X accelerometers and a portable breath by breath metabolic unit Cortex Metamax 3B were used for this purpose. The most important results show that a) the main predictors of maximum oxygen uptake are age, daily sedentary time and body mass index category; b) recess and physical education classes allow accruing higher physical activity per hour than other activities; c) differences in physical activities, net and accumulated bouts were displayed during physical education, recess and non-physical education or recess activities; d) school-aged subjects should discourage sedentary time during recess because those who met more than 15-minute had higher likelihood of being unhealthy.