Evaluating the Let's Move It intervention programme theory for adolescents' physical activity: theorized psychosocial mechanisms of behavioural changes
Objectives Behaviour change theories have extensively been used in health behaviour change interventions and their programme theories. However, they are rarely evaluated in randomized field studies. The Let's Move It intervention targeted various psychosocial constructs to increase adolescents&...
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| Main Authors: | , , , , , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
February 2025
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| In: |
British journal of health psychology
Year: 2025, Volume: 30, Issue: 1, Pages: 1-21 |
| ISSN: | 2044-8287 |
| DOI: | 10.1111/bjhp.12744 |
| Online Access: | Verlag, kostenfrei, Volltext: https://doi.org/10.1111/bjhp.12744 Verlag, kostenfrei, Volltext: http://onlinelibrary.wiley.com/doi/abs/10.1111/bjhp.12744 
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| Author Notes: | Minttu Palsola, Vera Araújo-Soares, Wendy Hardeman, Ari Haukkala, Matti Toivo Juhani Heino, Falko Sniehotta, Reijo Sund, Tommi Vasankari, Nelli Hankonen |
| Summary: | Objectives Behaviour change theories have extensively been used in health behaviour change interventions and their programme theories. However, they are rarely evaluated in randomized field studies. The Let's Move It intervention targeted various psychosocial constructs to increase adolescents' physical activity. A theory-based process evaluation aiming to illuminate the trial findings as well as to test the programme theory used is conducted. Specifically, we investigate whether the intervention influenced the theorized determinants of change immediately post-intervention and after 1 year, and whether these determinants were associated with changes in physical activity. Design A cluster-randomized controlled trial (n = 1166). Methods We measured theorized determinants with self-report, and physical activity (PA) with accelerometry and self-report. The effects are evaluated with repeated measures ANOVA and regression models. Results No changes were detected in most theorized determinants but intervention arm reported higher enactment of behaviour change techniques used during intervention immediately post-intervention and lower descriptive norms for PA throughout. Autonomous motivation was associated with PA immediately post-intervention. Conclusions The lack of intervention effects may be due to many factors, for example insensitive measures, ceiling effects. However, reporting these null effects advances understanding of behaviour change processes. We introduce methodologic possibilities for future intervention programme theory evaluation efforts. |
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| Item Description: | Erstmals veröffentlicht: 24. September 2024 Gesehen am 27.01.2024 |
| Physical Description: | Online Resource |
| ISSN: | 2044-8287 |
| DOI: | 10.1111/bjhp.12744 |