Health Behavior Branch, Eunice Kennedy Shriver National Institute of Child Health & Human Development, 6100 Executive Blvd, Bethesda, MD 20892-7510, USA.
Int J Behav Nutr Phys Act. 2014 Mar 21;11(1):42. doi: 10.1186/1479-5868-11-42.
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.
Survey responses of a nationally representative cohort of 11th graders (N=2439) in the NEXT Generation Health Study were analyzed with structural equation modeling.
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.
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.
超过一半的美国高中生没有达到每周进行 5 小时中等至剧烈身体活动（MVPA）的推荐量。本研究的目的是确定社会环境与身体活动之间的关系如何通过整合包括内部/外部动机（源自自我决定理论 - SDT）在内的个人特征的现有测量来调节身体活动，以更好地理解青少年的 MVPA。
使用结构方程模型对下一代健康研究中全国代表性的 11 年级学生（N=2439）的调查响应进行了分析。
青少年的 MVPA 与 MVPA 计划（β=0.17）、同伴 MVPA（β=0.21）和内部动机（β=0.50）直接显著相关。内部动机与同伴 MVPA（β=0.31）、父母对 MVPA 的支持（β=0.16）和外部动机（β=0.40）有关。还发现了父母支持与外部动机（β=0.31）之间的显著关系。
内部动机较高且有更活跃朋友的青少年更有可能进行 MVPA。结果与 SDT 一致，表明计划是青少年 MVPA 的一个重要结构。
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