Autonomy supportive environments and mastery as basic factors to motivate physical activity in children: a controlled laboratory study

Table 1 Physical characteristics, demographics and activity attitudes

	Boys		Girls
	No choice n = 11	Choice n = 11	No choice n = 11	Choice n = 11
Age (yr)	10.6 ± 0.9	10.2 ± 1.4	9.6 ± 1.6	10.2 ± 1.3
Height (cm)	145.1 ± 14.4	146.1 ± 14.4	138.6 ± 11.7	142.6 ± 6.8
Weight (kg)	41.0 ± 3.1	39.0 ± 12.6	34.4 ± 8.8	36.4 ± 6.7
BMI %ile	74.8 ± 17.2	51.3 ± 32.1	54.2 ± 24.9	50.8 ± 25.7
SES	50.9 ± 10.5	56.8 ± 7.3	49.8 ± 7.7	49.2 ± 11.5
Wii play (hr/wk)	4.0 ± 1.4	2.0 ± 1.9	2.0 ± 2.7	2.7 ± 3.9
Physical activity attitudes
Adequacy	23.8 ± 3.4	21.8 ± 5.1	21.6 ± 3.3	21.8 ± 5.7
Predilection	30.5 ± 3.9	27.2 ± 5.7	30.9 ± 4.0	29.2 ± 5.3
Enjoyment^a	11.5 ± 0.7	10.5 ± 2.7	9.6 ± 2.0	9.2 ± 2.9

Data are mean ± SD
^ap < 0.05 for main effect of gender
There were no significant main effects of choice group
SES socioeconomic status. An SES of 40 through 50 is equivalent to medium size business owners, minor professionals and technical jobs, such as computer programmers, real estate agents, sales managers, social workers and teachers.
Physical activity attitude scales - scored such that higher scores reflect greater perceived self-efficacy. The range is 19 to76 when summing the component scale scores to yield a total score.

ISSN: 1479-5868