Acceleration, or accelerated physical development, is an observed process in child development that has become more noticeable over the past 100–150 years. Within this process, changes occur in the anatomical and physiological parameters of the body, such as height and weight, both in newborns and in school-age children.
Acceleration may depend on various factors, including biological and social ones. For example, changes in lifestyle, such as nutrition and health care, as well as improved conditions that reduce the risk of infectious diseases and more accessible medical care, may influence the accelerated physical development of the body.
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