Lee Eun-Young, An Kiyong, Jeon Justin Y, Rodgers Wendy M, Harber Vicki J, Spence John C
1Faculty of Physical Education and Recreation, University of Alberta, Edmonton, AB, CANADA; and 2Department of Sports and Leisure Studies, Yonsei University, Seoul, SOUTH KOREA.
Med Sci Sports Exerc. 2016 Dec;48(12):2454-2461. doi: 10.1249/MSS.0000000000001031.
INTRODUCTION/PURPOSE: To examine whether body fatness (i.e., body mass index and percent body fat) and psychosocial correlates of physical activity (PA) mediate the relationships between pubertal status and PA and sedentary behavior (SB) among South Korean adolescent girls.
Pubertal status, body fatness, sport competence, perceived barriers to PA, self-efficacy, parental support for PA, self-reported and step-determined PA, and self-reported SB were assessed among 236 South Korean adolescent girls (mean age = 13.56 ± 1.2 yr).
A direct association was identified between pubertal status and PA in all models; more advanced pubertal status predicted lower PA among South Korean adolescents (b = -0.51 to -0.57; P < 0.001). Indirect effects on the pubertal status-PA relationship were also found: body fatness, perceived barriers to PA, and self-efficacy mediated the relationship between pubertal status and PA. Parental support for PA did not moderate the relationship between maturation and PA. SB was not associated with pubertal status.
This study found mediated effects of body fatness, and psychosocial correlates (i.e., perceived barriers to PA, self-efficacy) on the relationship between maturity and PA among South Korean adolescent girls. Efforts to promote PA among South Korean adolescent girls should focus on reducing perceived barriers to PA, and increasing self-efficacy by providing more opportunities to have positive, and enjoyable experiences in PA among early-maturing girls.
引言/目的：探讨身体脂肪含量（即体重指数和体脂百分比）以及身体活动（PA）的社会心理相关因素是否介导韩国青春期女孩的青春期状态与PA及久坐行为（SB）之间的关系。
对236名韩国青春期女孩（平均年龄 = 13.56 ± 1.2岁）进行了青春期状态、身体脂肪含量、运动能力、PA的感知障碍、自我效能感、父母对PA的支持、自我报告和步数测定的PA以及自我报告的SB评估。
在所有模型中均发现青春期状态与PA之间存在直接关联；在韩国青少年中，青春期状态越成熟，PA越低（b = -0.51至-0.57；P < 0.001）。还发现了对青春期状态-PA关系的间接影响：身体脂肪含量、PA的感知障碍和自我效能感介导了青春期状态与PA之间的关系。父母对PA的支持并未调节成熟与PA之间的关系。SB与青春期状态无关。
本研究发现身体脂肪含量以及社会心理相关因素（即PA的感知障碍、自我效能感）对韩国青春期女孩成熟与PA之间的关系具有中介作用。促进韩国青春期女孩PA的努力应集中在减少PA的感知障碍，并通过为早熟女孩提供更多在PA中获得积极且愉快体验的机会来提高自我效能感。
