Body mass index and physical fitness in university students: sex differences and nonlinear patterns in a large cross-sectional study
Background Body mass index (BMI) is routinely used in university health surveillance, but its sex- and grade-specific association with multidimensional physical fitness, including nonlinear patterns, remains unclear. Methods Data from 16,292 university students (8,505 females; 7,787 males; aged 17–23 years) who complet...