Isotemporal substitution analysis of the effects of in-kindergarten structured and unstructured activity behaviors on sleep problems in preschool children.

Changes in young children’s sleep problems following 10-minute isotemporal substitution of structured-unstructured activity behaviors The results of the isotemporal substitution models (Table 5 ) showed that when S‐MVPA replaced SB ( β =-0.207, 95%CI:-0.400 to -0.014, raw P = 0.036), S‐LPA ( β =-0.342, 95%CI:-0.660 to -0.023, raw P = 0.036), or US‐LPA ( β =-0.232, 95%CI: -0.416 to -0.048, raw P = 0.014) for 10 min, children’s sleep onset delay (SOD) showed a decreasing trend.

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