Table 1.

Descriptive statistics for each outcome measure at baseline and post-intervention

Variables	Intervention M (n), SD	Control M (n), SD
Accelerometer - MVPA
Baseline	21.06(67) 6.24	23.48 (51) 7.48
Post	24.91 (46) 7.48*	19.50 (26) 8.20
K-27 total
Baseline	115.12 (76) 16.59	110.78 (56) 15.37
Post	118.88 (76) 15.11	112.40 (56) 14.51
Autonomy support
Baseline	31.02 (76) 6.03	28.90 (56) 6.48
Post	33.68 (76) 7.24*	28.51 (56) 6.20
Autonomy satisfaction
Baseline	16.99 (76) 4.87	17.62 (56) 4.51
Post	19.14 (76) 4.03*	17.85 (56) 4.20
Competence satisfaction
Baseline	18.27 (76) 5.25	18.47 (56) 4.53
Post	19.30 (76) 4.15	18.66 (56) 4.40
Relatedness satisfaction
Baseline	23.38 (76) 5.53	22.12 (56) 6.38
Post	24.59 (76) 5.68	22.31 (56) 6.55
Total needs satisfaction
Baseline	58.04 (76) 13.44	58.22 (56) 12.82
Post	63.05 (76) 11.68	58.82 (56) 11.58
Intrinsic motivation
Baseline	12.53 (76) 3.34	12.23 (56) 3.98
Post	13.47 (76) 2.85	13.01 (56) 2.97
Identified regulation
Baseline	11.31 (76) 3.41	10.81 (56) 3.17
Post	12.54 (76) 2.91	11.55 (56) 2.98
Introjected regulation
Baseline	8.78 (76) 3.34	8.88 (56) 3.58
Post	9.35 (76) 3.71	9.10 (56) .3.74
External regulation
Baseline	7.52 (76) 3.46	7.37 (56) 3.12
Post	6.80 (76) 3.56	6.32 (56) 2.91

M mean, n sample size, SD standard deviation, K-27 Kidscreen-27

*Significant interaction effect for group and time from baseline to post-intervention