Which study revealed that American children were less fit than European children?

The Kraus-Weber Study is significant because it was one of the first large-scale investigations into the physical fitness levels of American children compared to their European counterparts. Conducted in the 1950s, this study involved testing children's muscular strength, flexibility, and overall fitness. The findings indicated that a higher percentage of American children failed to meet the fitness standards set by the researchers when compared to European children. This sparked widespread concern about the state of physical fitness among American youth and led to increased emphasis on physical education in schools. The study's results highlighted the differences in fitness levels, emphasizing the need for improved physical activity programs for children in the United States.