Table 2.

Mean percentage of time and minutes spent in sedentary and MVPA for the total sample (n = 177) and by BMI and WHtR weight status groups

Baseline3 mo6 mo9 mo12 mo
Wear time (M, SD)a, min831.0 (78.22)830.7 (88.5)829.9 (90.9)822.7 (82.9)825.5 (86.1)
Sedentary
 Total (% M, SD)78.10 (5.69)77.85 (5.84)z77.92 (5.81)78.26 (6.03)78.60 (5.93)z
 Total (M, SD), min647.5 (64.2)645.4 (74.7)645.0 (73.2)641.3 (70.3)647.3 (71.7)
BMI
 Healthy weight78.29 (5.69)77.35 (5.73)y77.27 (6.09)77.61 (5.99)78.43 (5.82)y
 Overweight77.92 (5.72)x78.30 (5.93)78.51 (5.52)78.85 (6.04)x78.76 (6.04)
WHtR
 <0.0578.37 (5.13)wv76.61 (5.44)w76.35 (5.56)v76.81 (5.70)77.50 (6.14)
 ≥0.5077.99 (5.91)ut78.34 (5.93)78.54 (5.82)78.83 (6.09)u79.04 (5.81)t
MVPA
 Total (% M, SD)1.95 (1.42)b2.01 (1.53)cd1.92 (1.54)e1.82 (1.37)c1.72 (1.38)bde
 Total (M, SD), min16.3 (12.1)16.7 (12.9)16.0 (13.2)15.0 (11.4)14.2 (11.4)
BMI
 Healthy weight2.15 (1.53)2.33 (1.65)f2.27 (1.69)g2.15 (1.43)1.96 (1.40)fg
 Overweight1.77 (1.29)hi1.72 (1.35)1.60 (1.33)1.52 (1.24)h1.51 (1.34)i
WHtR
 <0.052.13 (1.51)jk2.33 (1.64)j2.23 (1.69)k2.12 (1.42)1.95 (1.39)
 ≥0.501.77 (1.31)lmn1.70 (1.36)op1.63 (1.34)l1.53 (1.26)mo1.51 (1.35)np

NOTE: BMI (healthy weight: n = 86; overweight: n = 91) and WHtR (n = 50 healthy, n = 127 unhealthy). Rows with bold values identify significant (P < 0.05) weight status mean differences within each time point: t(1,176) = 2.03 to 4.16, d = 0.33 to 0.47. Columns with the same alphabet superscript identify significant (P < 0.05) time mean differences within the total sample or each weight status category: t(1,176) = 1.97–3.98, d = 0.07–0.20. Effect sizes (d) can be interpreted as: small = 0.2, medium = 0.5, and large = 0.8.

  • aAccelerometer wear time in min/d.