Introduction: It has been suggested that physical education (PE) can make a meaningful contribution to children's physical activity (PA) levels. The amount of moderate-to-vigorous physical activity (MVPA) in PE has been quantified in various manners, including heart rate monitoring and direct observation …

The Caucasus is a region with a turbulent history in which Russia has played an important role as occupier. During the 17th and 18th century Russia became a dominant force in the Caucasus. Near the end of the 19th century Russia was finally able to conquer the whole region. However, after many decades …