Background
Methods
Study design and recruitment
Intervention
Primary outcome: Physical activity assessment
Secondary outcomes
Covariates
Process evaluation
Analyses
Results
Baseline characteristics
Variable | Control (n = 62) | Intervention (n = 169) |
p-value |
---|---|---|---|
Age distribution (%) | |||
< 9 yrs | 30 (48.4) | 95 (56.2) | 0.29 |
9–10 yrs | 32 (51.6) | 74 (43.7) | |
Sex (%) | |||
Female | 33 (53.2) | 79 (46.7) | 0.38 |
Male | 29 (46.8) | 90 (53.2) | |
Ethnicity (%) | |||
Caucasian | 20 (32.2) | 60 (35.5) | 0.03 |
Mixed | 5 (8.1) | 24 (14.2) | |
Asian | 15 (24.2) | 23 (13.6) | |
Black | 16 (25.8) | 26 (15.4) | |
Other | 6 (9.7) | 36 (21.3) | |
Body mass index (kg/m2) | 17.3 ± 2.9 | 17.5 ± 3.4 | 0.63 |
Body fat (%) | 22.6 ± 7.0 | 21.5 ± 7.4 | 0.30 |
Hand grip (kg) | 13.4 ± 3.8 | 13.0 ± 4.7 | 0.52 |
Sit and reach (cm) | 23.2 ± 5.8 | 23.2 ± 16.9 | 0.98 |
Horizontal jump (cm) | 110.4 ± 18.5 | 106.8 ± 20.7 | 0.23 |
Peak flow (l/min)a
| 204.9 ± 41.9 | 154.0 ± 55.7 | 0.001 |
Actigraph wear time (min/d) | 715.2 ± 85.9 | 755.9 ± 83.9 | 0.001 |
Valid wear days | 4.3 ± 1.5 | 4.7 ± 1.7 | 0.14 |
Total MVPA (min/d) | 24.8 ± 12.3 | 30.1 ± 17.5 | 0.03 |
Total light activity (min/d) | 337.6 ± 70.9 | 392.2 ± 56.9 | 0.001 |
Total sedentary (min/d) | 352.7 ± 55.9 | 333.6 ± 75.4 | 0.07 |
School time MVPA (min/d) | 14.1 ± 7.6 | 13.6 ± 7.5 | 0.69 |
School light activity (min/d) | 158.7 ± 29.5 | 178.1 ± 31.1 | 0.001 |
School time sedentary (min/d) | 187.2 ± 32.3 | 168.3 ± 32.2 | 0.001 |
Effects of intervention
Full sample | Under 9 yr. olds | 9–10 yr. olds | |
---|---|---|---|
Sedentary (min/d)
| |||
Control | Ref | Ref | Ref |
Intervention | −3.8 (−29.2, 21.6) | −28.0 (−1.9, −54.1) | 18.7 (−20.6, 57.9) |
Light PA (min/d)
| |||
Control | Ref | Ref | Ref |
Intervention | 4.1 (−17.9, 26.1) | 24.6 (0.3, 48.9) | −13.1 (−46.2, 20.1) |
MVPA (min/d)
| |||
Control | Ref | Ref | Ref |
Intervention | −1.4 (−7.1, 4.2) | 3.5 (−3.0, 10.0) | −7.7 (−18.3, 2.9) |
Total cpm
| |||
Control | Ref | Ref | Ref |
Intervention | −5.5 (−119.9, 108.9) | 109.1 (−2.8, 221.0) | −135.8 (−344.6, 73.1) |
Full sample | Under 9 yr. olds | 9–10 yr. olds | |
---|---|---|---|
Sedentary (min/d)
| |||
Control | Ref | Ref | Ref |
Intervention | −6.8 (−38.8, 25.2) | −19.0 (−1.0, −37.0) | 11.2 (−33.8, 56.4) |
Light PA (min/d)
| |||
Control | Ref | Ref | Ref |
Intervention | 6.9 (−19.4, 33.1) | 17.1 (0.1, 34.2) | −7.1 (−46.6, 32.5) |
MVPA (min/d)
| |||
Control | Ref | Ref | Ref |
Intervention | −0.8 (−7.1, 5.5) | 1.6 (−2.4, 5.6) | −5.0 (−10.5, 0.5) |
Total cpm
| |||
Control | Ref | Ref | Ref |
Intervention | −5.5 (−119.9, 108.9) | 109.1 (−2.8, 221.0) | −135.8 (−344.6, 73.1) |