Table 3

Changes in physical activity levels, fitness and obesity over the 3-month intervention period

nBaselineFollow-upMean (95% CI) change*P valueICC subjectICC HLC
Physical activity levels578
MVPA (min/day)35.4 (21.6)37.3 (23.3)1.4 (−0.4 to 3.1)0.1310.630.02
VPA (min/day)0.9 (2.4)1.0 (2.2)0.0 (−0.2 to 0.2)0.8540.480.00
LPA (min/day)177.0 (51.6)182.4 (54.9)4.0 (0.5 to 7.5)0.0250.650.07
SED (min/day)616.7 (72.4)611.2 (79.3)−5.6 (−9.8 to -1.3)0.0100.680.05
Overall PA (cpm)281 (116)294 (126)11 (1 to 20)0.0230.670.01
Steps (number/day)6070 (2513)6496 (2760)362 (172 to 552)<0.0010.670.02
10 min MVPA bouts (min/day)10.6 (14.7)11.5 (14.4)0.5 (−0.9 to 1.8)0.5070.480.03
Fitness, TTE (min)41212.3 (2.9)13.1 (3.0)0.8 (0.6 to 1.0)<0.0010.590.23
Obesity
 BMI (kg/m2)67732.3 (6.7)32.0 (6.6)−0.2 (−0.1 to –0.3)<0.0010.940.04
 WC (cm)688105.7 (17.1)104.0 (16.4)−1.7 (−2.0 to −1.3)<0.0010.960.04
 W:H ratio (cm)6810.95 (0.10)0.94 (0.10)−0.01 (−0.00 to −0.01)<0.0010.830.08
  • p values ≤0.05 are considered as statistically significant changes.

  • *All estimates were adjusted for random intercepts of HLCs (setting) and subjects. Physical activity estimates were additionally adjusted for wear time and season.

  • BMI, body mass index; cpm, counts per minute; HLC, Healthy Life Centre; ICC, intraclass correlation coefficient; LPA, light PA; MVPA, moderate to vigorous PA; PA, physical activity; SED, sedentary time; TTE, time to exhaustion; VPA, vigorous PA; WC, waist circumference; W:H, waist to hip ratio.