- Title
- Intervention effects and mediators of well-being in a school-based physical activity program for adolescents: the 'Resistance Training for Teens' cluster RCT
- Creator
- Smith, Jordan J.; Beauchamp, Mark R.; Faulkner, Guy; Morgan, Philip J.; Kennedy, Sarah G.; Lubans, David R.
- Relation
- ARC.FT140100399 http://purl.org/au-research/grants/arc/FT140100399
- Relation
- Mental Health and Physical Activity Vol. 15, Issue October, p. 88-94
- Publisher Link
- http://dx.doi.org/10.1016/j.mhpa.2018.08.002
- Publisher
- Elsevier
- Resource Type
- journal article
- Date
- 2018
- Description
- Objective: To examine the impact of a school-based physical activity intervention on adolescents' self-esteem and subjective well-being, and to explore moderators and mediators of intervention effects. Methods: Resistance Training for Teens was evaluated using a cluster RCT in 16 schools located in New South Wales, Australia. Adolescents (N = 508; 14.1 ± 0.5 years; 49.6% female) completed measures of global self-esteem, subjective well-being, and hypothesized mediators (i.e., perceived fitness, resistance training self-efficacy, and autonomous motivation) at baseline (April-June, 2015) and post-intervention (October-December). The school-based physical activity program was delivered by teachers over 10-weeks via Physical Education, co-curricular school sport, or an elective subject known as Physical Activity and Sport Studies, and involved once-weekly fitness sessions and additional lunch-time sessions. Intervention effects and moderator analyses were tested using multi-level linear regression analyses with interaction terms. Multi-level mediation analyses were used to explore potential mediators of changes in well-being outcomes. Results: Intervention effects for self-esteem (ß = 0.05, p =.194) and wellbeing (ß = 0.03, p =.509) were not statistically significant. Moderator analyses showed effects for self-esteem were greater for the overweight/obese subgroup (p =.069 for interaction), and resistance training self-efficacy was a significant mediator of changes in self-esteem (product-of-coefficients [AB] = 0.021, SE = 0.010, 95% CIs = 0.002 to 0.040). No other significant indirect effects were observed. Conclusion: Overall, Resistance Training for Teens did not improve adolescents' self-esteem or subjective well-being. However, our mediation findings lend support to resistance training self-efficacy as a mechanism explaining the positive effect of resistance training on self-esteem.
- Subject
- mental health; resistance training; fitness; school; youth
- Identifier
- http://hdl.handle.net/1959.13/1393001
- Identifier
- uon:33481
- Identifier
- ISSN:1755-2966
- Rights
- ©2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
- Language
- eng
- Full Text
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