Specifika pohybové aktivity dětí raného a středního školního věku
When evaluating the physical activity of children is usually maintained a standard classification ages. Early school age is called relatively wide stage from 6 to 11 (resp.12) old years. In the description and interpretation of data about the PA of children is also important to take account the specifics during ontogeny in this age group and focus on their more detailed study. The aim is comparison of physical activity levels of children of primary schools in the various segments of the day and week 2 in terms of ontogenesis stages of development: early school age and middle school age. Active energy expenditure (kcal × kg-1 × den-1) was obtained by the Caltrac and daily number of steps (kroky × den-1) by pedometers Yamax Digi Walker. Weekly measurements were found in the PA significant differences (p <0,001) between indicators PA monitored files observed in all segments of the day and week. The smallest difference in values was detected at the time after school. For children of middle school age remains AEE value during free time after school the same as in the early school age. On the weekends compared to values lower than at early school age.