Mechanisms linking physical activity with psychiatric symptoms across the lifespan: a protocol for a systematic review

The longitudinal association between sport participation and self-esteem in youth in the Netherlands: The role of sport type

OBJECTIVES

To investigate the longitudinal associations of sport participation with self-esteem in youth, and whether this relationship differs between team compared to individual, and non-esthetic compared to esthetic sports.

DESIGN

Prospective data on sport participation at age 10 and self-esteem at age 13 years was used, collected from 2970 participants within Generation R, a population-based cohort study in the Netherlands.

METHODS

Hours of sports per week were measured with a questionnaire, completed by the primary caregivers. Participation in sports was classified into team vs. individual and non-esthetic vs. esthetic sports. Self-esteem was assessed by the Harter's Self-Perception Profile. Linear regression analyses, adjusted for multiple testing were conducted to test the association between sports and self-esteem subdomains. Then, differences in self-esteem among youth participating in different types of sports were explored by two separate sets of linear regression with team and non-esthetic sports as the reference groups.

RESULTS

More hours of sports were associated with higher self-esteem (β = 0.081, pfdr < 0.001). This association was driven by the subdomains social acceptance (β = 0.057, pfdr = 0.004) and athletic competence (β = 0.242, pfdr < 0.001). Participation in individual or esthetic sports was associated with lower self-esteem compared to the team (β = -0.196, pfdr < 0.001) or non-esthetic (β = -0.172, pfdr = 0.002) sports.

CONCLUSIONS

Sport participation, particularly team and non-esthetic sports, may be beneficial for self-esteem among youth, driven by aspects like socializing and one's ability to do well at sports. The aspects of different types of sports could be considered for developing improved sport-related environments and effective physical activity interventions.

Mechanisms Linking Physical Activity with Psychiatric Symptoms Across the Lifespan: A Systematic Review

BACKGROUND

Physical activity has been suggested as a protective factor against psychiatric symptoms. While numerous studies have focused on the magnitude of physical activity's effect on psychiatric symptoms, few have examined the potential mechanisms.

OBJECTIVE

The current review aimed to synthesize scientific evidence of the mechanisms through which physical activity might reduce psychiatric symptoms across the lifespan.

METHODS

We included articles that were published before March 2022 from five electronic databases (MEDLINE, Web of Science, PsycINFO, Embase, and Cochrane). A qualitative synthesis of studies was conducted. The risk of bias assessment was performed using The Joanna Briggs Institute Critical Appraisal Tool for Systematic Reviews. Studies were included if they explored the possible mechanisms through which physical activity influences psychiatric symptoms (i.e., internalizing and externalizing symptoms) across the lifespan.

RESULTS

A total of 22 articles were included (three randomized controlled trials, four non-randomized controlled trials, three prospective longitudinal studies, and 12 cross-sectional studies). Overall, most of the studies focused on children, adolescents, and young adults. Our findings showed that self-esteem, self-concept, and self-efficacy were the only consistent paths through which physical activity influences psychiatric symptoms (specifically depressive and anxiety symptoms) across the lifespan. There were insufficient studies to determine the role of neurobiological mechanisms.

CONCLUSIONS

Overall, future physical activity interventions with the purpose of improving mental health should consider these mechanisms (self-esteem, self-concept, self-efficacy) to develop more effective interventions.

CLINICAL TRIAL REGISTRATION

The protocol of this study was registered in the PROSPERO database (registration number CRD42021239440) and published in April 2022.