Table 1.
Description of the assessed variables
| Concept | Questionnaire | # items | Example question | α |
|---|---|---|---|---|
| External regulation | Exercise Self-Regulation Questionnaire (SRQ-E) | 4 | I try to be sufficiently physically active because others would be angry at me if I did not. | .73 |
| Totally disagree (1) - Totally agree (7) | ||||
| Introjected regulation | Exercise Self-Regulation Questionnaire (SRQ-E) | 4 | I try to be sufficiently physically active because I feel guilty if I do not exercise regularly. | .73 |
| Totally disagree (1) - Totally agree (7) | ||||
| Identified regulation | Exercise Self-Regulation Questionnaire (SRQ-E) | 4 | I try to be sufficiently physically active because exercising helps me feel better. | .88 |
| Totally disagree (1) - Totally agree (7) | ||||
| Intrinsic motivation | Exercise Self-Regulation Questionnaire (SRQ-E) | 4 | I try to be sufficiently physically active because it’s fun. | .88 |
| Totally disagree (1) - Totally agree (7) | ||||
| Interest/enjoyment | Intrinsic Motivation Inventory (IMI) | 7 | I enjoy being physically active. | .92 |
| Totally disagree (1) - Totally agree (7) | ||||
| Perceived competence | Intrinsic Motivation Inventory (IMI) | 6 | I think I am pretty good at physical activities. | .87 |
| Totally disagree (1) - Totally agree (7) | ||||
| Effort/importance | Intrinsic Motivation Inventory (IMI) | 5 | I put a lot of effort into physical activities. | .82 |
| Totally disagree (1) - Totally agree (7) | ||||
| Pressure / tension | Intrinsic Motivation Inventory (IMI) | 5 | During physical activities, I am very tense | .82 |
| Totally disagree (1) - Totally agree (7) | ||||
| Perceived choice | Intrinsic Motivation Inventory (IMI) | 7 | I feel that it is my own choice to perform physical activities. | .81 |
| Totally disagree (1) - Totally agree (7) | ||||
| Value/usefulness | Intrinsic Motivation Inventory (IMI) | 7 | I believe being physically active could be valuable to me. | .88 |
| Totally disagree (1) - Totally agree (7) | ||||
| Intention | (Sheeran & Orbell 1999) | 3 | To what extent are you planning to be sufficiently physically active? | .93 |
| Not at all (1) - Very much (10) | ||||
| Commitment | (Webb & Sheeran 2005) | 3 | How committed are you to being physically active? | .82 |
| Not at all (1) - Very much (5) |