Abstract
This research is drawn up as a short longitudinal monitoring of 1925 children (990 boys, 935 girls), aged 6 to 15 years, at 20 elementary schools in four regions of the Czech Republic in several age groups, which is conducted at the same time and which include same age groups. Data of repeatedly examinated probands of wide age range were acquired in a short time period.
With the help of linear regression model with mixed effect the growth velocity curves of 6 somatic traits have been designed. Timing, intensity and duration of separate growth spurts have been observed as well as the mutual location of both points of growth velocity local maxima and minima and points of the maximal acceleration and deceleration.
The results demonstrate that the velocity parameters with variable growth dynamics contrary to parameters with regular growth velocity - have higher number of partial growth spurts and an opposite course.