Motivation and planning as mediators of the relation between social support and physical activity among U.S. adolescents: a nationally representative study

International Journal of Behavioral Nutrition and Physical Activity

Bruce G Simons-Morton¹  Jessamyn G Perlus¹  Denise L Haynie¹  Ronald J Iannotti²  Kaigang Li¹ 

[1] Health Behavior Branch, Eunice Kennedy Shriver National Institute of Child Health & Human Development, 6100 Executive Blvd, Bethesda, MD 20892-7510, USA;University of Massachusetts Boston, 100 Morrissey Blvd, Boston, MA 02125-3393, USA

关键词: SDT;    Adolescents;    Social support;    Planning;    Motivation;    Physical activity;   

Others  :  823210
DOI  :  10.1186/1479-5868-11-42

 received in 2013-07-18, accepted in 2014-03-17,  发布年份 2014

【 摘 要 】

Background

More than half of U.S. high-school students do not meet the moderate and vigorous physical activity (MVPA) 5 hours per week recommendation. The purpose of this study was to determine how individual dimensions (motivation and planning) mediate the relationship of social context with physical activity by integrating available measures of personal characteristic including internal/external motivations (derived from Self-Determination Theory -SDT]) for MVPA, MVPA planning, peer MVPA, and parental support to better understand adolescent MVPA.

Methods

Survey responses of a nationally representative cohort of 11^th graders (N = 2439) in the NEXT Generation Health Study were analyzed with structural equation modeling.

Results

Adolescent MVPA was directly, significantly associated with MVPA planning (β = 0.17), peer MVPA (β = 0.21), and internal motivation (β = 0.50). Internal motivation was associated with peer MVPA (β = 0.31), parental support for MVPA (β = 0.16), and external motivation (β = 0.40). A significant relation between parental support and external motivation (β = 0.31) was also found.

Conclusions

Adolescents with higher internal motivation and more active friends were more likely to engage in MVPA. The results are consistent with SDT and suggest that planning is an important construct for adolescent MVPA.

【 授权许可】

   
2014 Li et al.; licensee BioMed Central Ltd.

【 图 表 】

Figure 1.

Figure 2.

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