Physical activity of 7-8 year old Lithuanian children and associations with individual, family and school environment factors

[...]. Aim and objectives of the study. The aim of this study was to assess the physical activity of Lithuanian first-grade schoolchildren and to determine its association with individual, family socioeconomic, and shool environment factors. The objectives of the study: 1. To analyze the types and level of physical activity of first-grade schoolchildren. 2. To evaluate associations between the physical activity of first-grade schoolchildren and their individual and family socioeconomic factors. 3. To assess associations between the physical activity of first-grade schoolchildren and variables of the school environment. 4. To determine the trends in the prevalence of physical activity among 7-8-year-old children in Lithuania during a 5-year period (2008-2013). [...]