Changes in the conditioning-motor sphere in the XX century and two decades of the XXI century (review)

The article (review) presents change tendencies in the indicators of different conditioning abilities (speed, strength, speed-strength, endurance, flexibility) of children and adolescents aged 7-18 years old of both sexes in different countries of the world. In most studies, up to the mid-80s of the last century, scientists from different countries of Europe, Asia, America, demonstrated positive secular trend of increase. After that time, the comparison of indicators of different conditioning abilities of school-age children and their peers at the end of the 20th century and the first two decades of the 21st century in different countries has already shown a distinct deteri oration. The reasons for this unfavorable tendency are discussed and recommendations for its improvement are given