Fig. 4

Analysis of SR impact on PA intensity (upper panel), prolonged sitting and planned PA (lower panel). Coefficient plots show point estimates with 95% (thick line) and 99% (thin line) confidence intervals. Robust standard errors are clustered on the participant (n = 118 treatment participants, 2 observations each). Partial eta-squared effect sizes are from the comparable ordinary least squares models. PA intensity categories were constructed using METS cutoffs from the actigraphy activity counts data (cutoffs derived in Lee and Tse³⁶. A bout of prolonged sitting was defined as ≥ 30 consecutive minutes within the sedentary METS classification (see Bellettiere et al.³⁸), while a bout of planned PA was defined as ≥ 10 consecutive minutes of moderate or vigorous METS activity³⁹. Results are similar if using actigraphy measured average nightly sleep instead of a binary SR indicator variable.