4至5岁学前儿童体重超重、肥胖与性别在水下运动技能获得中的差异：一项准实验研究

Background Childhood overweight and obesity are associated with impaired motor competence, yet evidence on how weight status relates to structured aquatic motor skill learning in preschoolers—and whether sex moderates this relationship—remains scarce. This study compared changes in aquatic motor competence between overweight/obese and healthy-weight 4–5-year-old preschoolers following a common 8-week structured aquatic programme, and examined sex differences. Methods Sixty 4–5-year-old children (30 overweight/obese, 30 healthy-weight; 15 boys and 15 girls per group) without prior systematic aq