Intergenerational trends in body size among Moscow's young adults: socio-demographic influences of the 20th century.

This study aimed to investigate the influence of socio-demographic and epidemiological factors on the secular changes in body size indicators (height, weight, and BMI) among young adults aged 17-22 years in Moscow from the early 20th century to the present. Published average anthropometric data from screening surveys conducted from 1880/1925-26 to 2020-21 were analysed (4,823 males and 5,952 females), along with demographic data from the Federal State Statistics Service of the Russian Federation. Findings revealed consistent anthropometric trends and strong associations between secular changes in body size of Moscow youth and socio-demographic indicators such as population size, life expectancy, and infant mortality rates. An increase in height and weight was noted against the backdrop of urbanisation, increased life expectancy, and reduced infant mortality. These results indicate that the urbanisation process and the transformation of the epidemiological landscape in 20th-century Russia - marked by enhancements in public health, modernisation of the healthcare system, and medical advancements - have had a significant impact on changes in body size across generations. Notably, from the mid-20th century onwards, with the exception of the final decade, conditions favourable to growth and development were established, culminating in a significant increase in definitive anthropometric parameters across successive generations. The findings underscore the imperative for policymakers to bolster investments in urban development, healthcare, and education. Such strategic investments are essential for sustaining and amplifying the positive physical development trends witnessed.