Accelerometer based independent and combined associations of physical activity and sedentary time on physical fitness in preschool children: a cross-sectional study

Table 6 Isotemporal substitution of 30 min of TPA with 30 min of ST on the physical fitness composite Z-score in preschool children (n = 375).

Physical fitness composite Z-score	β (95% CI)	P Value
Model (replace 30 min of TPA) ^a	-0.15 (-0.05, -0.00)	0.029

Data are expressed as βs and 95% CIs. ^a Model was adjusted for age (months), sex, body mass index (kg/m²), accelerometer wear time (min/day) and TPA.