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Table 5 Predicted differences in zBMI, %WHtR, and CRF following reallocation of 15 min between movement behaviours

From: Fitness, fatness and the reallocation of time between children’s daily movement behaviours: an analysis of compositional data

  zBMI %WHtR CRF (VO2 peak, ml·kg·min−1) a
Sleep ST LPA MVPA Sleep ST LPA MVPA Sleep ST LPA MVPA
All children n = 169
 Sleep   0.05 −0.01 0.88   0.1 −0.4 5.1   0.0 −0.0 -2.4
 ST -0.05   −0.06 0.83 −0.1   −0.5 5.0 0.0   −0.0 -2.4
 LPA 0.01 0.06   0.89 0.3 0.4   5.5 0.0 0.0   -2.4
 MVPA -0.48 −0.43 −0.49   −2.8 −2.7 −3.1   1.3 1.3 1.3  
Underweight children n = 15 b
 Sleep   0.05 −0.01 0.59   0.1 −0.3 3.4   0.0 −0.0 -1.6
 ST -0.05   −0.06 0.54 −0.1   −0.4 3.3 0.0   −0.0 -1.6
 LPA 0.01 0.06   0.60 0.3 0.4   3.7 0.0 0.0   -1.6
 MVPA -0.39 −0.33 −0.40   −2.2 −2.1 −2.5   1.1 1.1 1.0  
Normal weight children n = 115
 Sleep   0.05 −0.01 0.77   0.1 −0.4 4.5   0.0 −0.0 -2.1
 ST -0.05   −0.06 0.72 −0.1   −0.5 4.4 0.0   −0.0 -2.1
 LPA 0.01 0.06   0.78 0.3 0.4   4.8 0.0 0.0   -2.1
 MVPA -0.45 −0.40 −0.46   −2.6 −2.5 −2.9   1.2 1.2 1.2  
Overweight/obese children n = 39
 Sleep   0.05 −0.01 1.82   0.1 −0.4 10.8   0.0 −0.0 -5.1
 ST -0.05   −0.06 1.77 −0.1   −0.5 10.7 0.0   −0.0 -5.1
 LPA 0.01 0.06   1.83 0.4 0.5   11.1 0.0 0.0   -5.0
 MVPA -0.64 −0.59 −0.65   −3.7 −3.6 −4.1   1.8 1.8 1.7  
  1. Estimation of change in zBMI, %WHtR or VO2 peak when the behaviour in the rows substitutes the behaviour in the columns
  2. zBMI Body Mass Index z-score; CRF cardiorespiratory fitness; VO 2 peak peak oxygen uptake; ST Sedentary Time; LPA Light Physical Activity; MVPA Moderate-to-Vigorous Physical Activity
  3. Analysis adjusted for IMD decile, age, and sex. a Analysis adjusted for IMD decile, age, sex, and zBMI. b Underweight results reported for presentation purposes only due to low sample size