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Table 2 Exploratory factor analysis on the Behavioural Regulation in Exercise Questionnaire-2

From: Self-determined motivation towards physical activity in adolescents treated for obesity: an observational study

Factor

1

2

3

4

5

h2

1. Intrinsic regulation

      

4. I do physical activities because it's fun

0.78

-

-

-

-

0.68

10. I enjoy my physical activity sessions

0.8

-

-

-

-

0.77

15. I find physical activity a pleasurable activity

0.79

-

-

-

-

0.73

18. I get pleasure and satisfaction from participating in physical activity

0.78

-

-

-

-

0.73

2. Amotivation

      

5. I don't see why I should have to do physical activities

-

0.72

-

-

-

0.64

9. I can't see why I should bother doing physical activities

-

0.83

-

-

-

0.72

12. I don't see the point in doing physical activities

-

0.81

-

-

-

0.7

19. I think doing physical activities is a waste of time

-0.52

0.43

-

-

-

0.56

3. External regulation

      

1. I do physical activities because other people say I should

-

-

0.76

-

-

0.58

6. I do physical activities because my friends/family/partner say I should

-

-

0.68

-

-

0.49

11. I do physical activities because others will not be pleased with me if I don't

-

-

0.71

-

-

0.56

16. I feel under pressure from my friends/family to do physical activities

-

-

0.52

-

-

0.55

4. Identified regulation

      

3. I value the benefits of physical activity

0.48

-

-

0.66

-

0.68

8. It's important to me to do physical activities regularly

-

-

-

0.77

-

0.66

14. I think it is important to make the effort to do physical activities regularly

-

-

-

0.54

0.48

0.61

17. I get restless if I don't do physical activities regularly

-

-

-

0.06

0.77

0.62

5. Introjected regulation

      

2. I feel guilty when I don't do physical activities

-

-

-

0.6

0.13

0.49

7. I feel ashamed when I miss my physical activities

-

-

-

-

0.53

0.73

13. I feel like a failure when I haven't done physical activities in a while

0.46

-

-

-

0.69

0.51

Eigenvalue

5.56

2.66

1.46

1.29

1.05

-

Factor variance

29.26

13.89

7.66

6.79

5.51

-

Total variance

29.26

43.24

50.9

57.68

63.19

-

Reliability 1

0.86

0.76

0.64

0.68

0.64

-

Reliability 2

0.88

0.77

0.64

0.61

0.65

-

  1. Reliability 1 = reliability from the obtained factor structure; Reliability 2 = reliability from the original subscales