@misc{Asienkiewicz_Ryszard_Tendencje,
 author={Asienkiewicz, Ryszard and Tatarczuk, Józef},
 howpublished={online},
 publisher={Zielona Góra: Lubuskie Towarzystwo Naukowe},
 publisher={Zielona Góra: Uniwersytet Zielonogórski, Wydział Pedagogiki, Psychologii i Socjologii},
 language={pol},
 abstract={The aim of the study was to show change directions in the physical development of children and school youth in the Lubuskie Voivodeship between 2002 and 2017. The study material was gathered between 2015 and 2018 among 3996 pupils (1858 boys and 2138 girls) from rural areas, ages 7-18, in randomly selected primary, junior high school, and secondary schools. The Martin technique was used to measure the height and body mass of the children and youth, on the basis of which the mass and height index (Rohrer`s index) was calculated.},
 abstract={The material was statistically elaborated and the significance of difference between them was calculated by using Student's t-test. The results were compared to the studies from between 2002 and 2003. On the basis of the 15-year-long observations (years 2002-2017), it was noted that the average body height of boys aged 10-14 and of girls aged 13-15 was increasing in rural areas of the Lubuskie Voivodeship. Changes in body height occurring in pupils aged 7-18 between 2002 and 2017 indicate that the phenomenon of secular trend is slowing down. Decels in body height among boys were noted at the ages 7, 9, and 18, and among girls at the ages 8, 10, and 17.},
 abstract={Within 15 years, an increase in body mass was noted in all age groups of girls, with differences between them being statistically insignificant (with the exception of 8-9- and 18-year-old girls). In the case of boys, a significant increase in body mass was noted at the ages of 8 and 11-18. Secular changes in the mass and height proportions in the studied pupils aged 7-18 point out to a significant increase in body thickness among boys at the ages of 9 and 11-18, and among girls at the ages of 8-10, 12-13, and 16-17. The pubescent leap in body height in the girls examined between 2002 and 2017 occurred at 11-12 years of age. In boys, the leap occurred at the age of 12-13, and showed lower values in 2017.},
 title={Tendencje zmian w rozwoju fizycznym dzieci i młodzieży wiejskiej Ziemi Lubuskiej w wieku 7-18 lat = Change tendencies in the physical development of children and rural youth aged 7-18 in the Lubusz Land},
 type={artykuł},
 keywords={trend sekularny, rozwój fizyczny, środowisko wiejskie, dzieci i młodzież szkolna, charakterystyka porównawcza, secular trend, physical development, rural environment, children and school youth, comparative characteristics},
}