Table 2.

Means, standard deviations and correlations among all variables (N = 436).

Variable	M	SD	1	2	3	4
1. Internalizing problems	13.46	4.52	1	–	–	–
2. Physical activity	22.03	18.52	−0.42**	1	–	–
3. Quality of sports friendship	82.60	20.99	−0.46**	0.43**	1	–
4. Social–emotional competence	89.52	21.16	−0.44**	0.44**	0.57**	1

*p < 0.05, **p < 0.01.