Hallal, P.C., Victora, C.G., Azevedo, M.R. and Wells, J.C. (2006) Adolescent physical activity and health: A systematic review. Sports Medicine, 36, 1019-1030.
 Janssen, I. and LeBlanc, A.G. (2010) Systematic review of the health benefits of physical activity and fitness in school-aged children and youth. International Journal of Behavioral Nutrition and Physical Activity, 7, 40.
 World Health Organization (2012) Global recommendation on physical activity for health.
 Ministry of Education, Culture, Sports, Science and Technology, Japan (2012) 2010’s national survey result of physical and athletic capacity and exercise habits: (6) sports and exercise habits.
 Baron, R. and Kenny, D. (1986) The moderator-mediator variable distinction in social psychological research: conceptual, strategic, and statistical considerations. Journal of Personality and Social Psychology, 51, 1173-1182.
 Dishman, R.K., Motl, R.W., Saunders, R., Felton, G., Ward, D.S. and Dowda, M., et al. (2004) Self-efficacy partially mediates the effect of a school-based physical activity intervention among adolescent girls. Preventive Medicine, 38, 628-636. doi:10.1016/j.ypmed.2003.12.007
 Dishman, R.K., Saunders, R.P., Motl, R.W., Dowda, M., and Pate, R.R. (2009) Self-efficacy moderates the relation between declines in physical activity and perceived social support in high school girls. Journal of Pediatric Psychology, 34, 441-451. doi:10.1093/jpepsy/jsn100
 Dishman, R.K., Dunn, A.L., Sallis, J.F., Vandenberg, R.J. and Pratt, C.A. (2010) Social-cognitive correlates of physical activity in a multi-ethnic cohort of middle-school girls: Two-year prospective study. Journal of Pediatric Psychology, 35, 188-198.
 Hsu, YW, Chou, C.P., Nguyen-Rodriguez, S.T., McClain, A.D., Belcher, B.R. and Spruijt-Metz, D. (2011) Influences of social support, perceived barriers, and negative meanings of physical activity on physical activity in middle school students. Journal of Physical Activity and Health, 8, 210-219.
 Trost, S.G., Sallis, J.F., Pate, R.R., Freedson, P.S., Taylor, W.C. and Dowda, M. (2003) Evaluating a model of parental influence on youth physical activity. American Journal of Preventive Medicine, 25, 277-282.
 Wu, T., Pender, N. and Noureddine, S. (2003) Gender differences in the psychosocial and cognitive correlates of physical activity among Taiwa-nese adolescents: A structural equation modeling approach. International Journal of Behavioral Medicine, 10, 93-105.
 Motl, R.W., Dishman, R.K., Ward, D.S., Saunders, R.P., Dowda, M. and Felton, G., et al. (2005) Comparison of barriers self-efficacy and per-ceived behavioral control for explaining physical activity across 1 year among adolescent girls. Health Psychology, 24, 106-111.
 Motl, R.W., Dishman, R.K., Ward, D.S., Saunders, R.P., Dowda, M. and Felton, G., et al. (2005) Perceived physical environment and physical activity across one year among adolescent girls: Self-efficacy as a possible mediator? Journal of Adolescent Health, 37, 403-408.
 Motl, R.W., Dishman, R.K., Saunders, R.P., Dowda, M. and Pate, R.R. (2007) Perceptions of physical and social environment variables and self-efficacy as correlates of self-reported physical activity among adolescent girls. Journal of Pediatric Psychology, 32, 6-12.
 Lubans, D.R., Okely, A.D., Morgan, P.J., Cotton, W., Puglisi, L. and Miller, J. (2012) Description and evaluation of a social cognitive model of physical activity behaviour tailored for adolescent girls. Health Education Research, 27, 115-128. doi:10.1093/her/cyr039
 Van der Horst, K., Paw, M.J., Twisk, J.W. and Van Mechelen, W. (2007) A brief review on correlates of physical activity and sedentariness in youth. Medicine & Science in Sports & Exercise, 39, 1241-1250.
 McKenzie, T.L., Marshall, S.J., Sallis, J.F. and Conway, T.L. (2000) Leisure-time physical activity in school environments: An observational study using SOPLAY. Preventive Medicine, 30, 70-77.
 Ridgers, N., Stratton, G. and Fairclough, S. (2006) Physical activity levels of children during school playtime. Sports Medicine, 36, 359-371.
 Ministry of Health, Labour, and Welfare, Japan (2007) 2007’s national survey results of Japanese health and nutrition status.
 Ministry of Health, Labour, and Welfare, Japan (2008) 2008’s national survey results of Japanese health and nutrition status.
 Ministry of Education, Culture, Sports, Science and Technology, Japan (2009) 2009’s national survey result of physical and athletic capacity and exercise habits: Physical fitness and BMI.
 Ministry of Education, Culture, Sports, Science and Technology, Japan (2010) 2010’s national survey result of physical and athletic capacity and exercise habits: Physical fitness and BMI.
 Sano, A., Le, D.S., Tran, M.H., Pham, H.T., Kaneda, M. and Murai E., et al. (2008) Study on factors of body image in Japanese and Viet-namese adolescents. Journal of Nutritional Science and Vita-minology, 54, 169-175.
 Berk, L.E. (2005) Infants, children and adolescents. 5th Edition, Allyn & Bacon Inc., Bosten.
 Koizumi K. (1997) Adaptation process during transi-tion from elementary school to junior high school. (Shō-chūgakkō de no kankyō ikō jitai ni okeru jidō, seito no tekiō katei chūgakkō nyūgaku, tenkō o chūshin to shite, in Japanese). Kasama Shobo, Tokyo.
 Cole, T., Bellizzi, M., Flegal, K. and Dietz, W. (2000) Establishing a standard definition for child overweight and obesity worldwide: International survey. Brtish Medical Journal, 320, 1240-1243.
 Centers for Disease Con-trol and Prevention (2011) About BMI for children and teens.
 He, L., Ishii, K., Shibata, A., Adachi, M., Nonoue, K. and Oka K. (2012) Patterns of physical activity outside of school time among Japanese junior high school students. Journal of School Health, in Press.
 Robert-Wilson, J., Levesque, L. and Holden, R.R. (2007) Development of a questionnaire assessing school physical activity environment. Measurement in Physical Education and Exercise Science, 11, 93-107.
 Ryan, G. and Dzewal-towski, D. (2002) Comparing the relationships between different types of self-efficacy and physical activity in youth. Health Education & Behavior, 29, 491-504. doi:10.1177/109019810202900408
 North Carolina State University (2012) Structural equation modeling: Statnotes. North Carolina State University, Raleigh.
 Kline, R.B. (1998) Principle and practice of structural equation modeling. Guilford, New York.
 Schumacker, R.E. and Lomax, R.G. (2004) A beginner’s guide to structural equation modeling. 2nd Edition, Lawrence Erlbaum Associates, Mahwah.
 Hamparsum, B. (1987) Model selection and Akaike’s information criterion (AIC): The general theory and its analytical extensions. Psychometrika, 52, 345-370.
 Duncan, S., Duncan, T. and Strycker, L. (2005) Sources and types of social support in youth physical activity. Health Psychology, 24, 3-10.
 Hohepa, M., Scragg, R., Schofield, G., Kolt, G.S. and Schaaf, D. (2007) Social support for youth physical activity: Importance of siblings, parents, friends and school support across a segmented school day. International Journal of Behavioral Nutrition and Physical Activity, 4, 54.
 Lytle, L.A., Murray, D.M., Evenson, K.R., Lytle, L.A., Murray, D.M. and Evenson, K.R., et al. (2009) Mediators affecting girls’ levels of physical activity outside of school: Findings from the trial of activity in adolescent girls. Annals of Behavioral Medicine, 38, 124-136.
 Patnode, C.D., Lytle, L.A., Erickson, D.J., Sirard, J.R., Barr-Anderson, D. and Story, M. (2010) The relative influence of demographic, individual, social, and environmental factors on physical activity among boys and girls. International Journal of Behavioral Nutrition and Physical Activity, 7, 79. doi:10.1186/1479-5868-7-79
 Alderman, B.L., Ben-ham-Deal, T.B. and Jenkins, J.M. (2010) Change in parental influence on children’s physical activity over time. Journal of Physical Activity and Health, 7, 60-67.
 Welk, G., Wood, K. and Morss, G. (2003) Parental influences on physical activity in children: An exploration of potential mechanisms. Pediatric Exercise Science, 15, 19-33.
 Ministry of Education, Culture, Sports, Science and Technology, Japan (2010) 2010’s national survey result of physical and athletic capacity and exercise habits.
 Robbins, L.B., Stommel, M. and Hamel, L.M. (2008) Social support for physical activity of middle school students. Public Health Nursing, 25, 451-460.
 Biddle, S.J.H., Whitehead, S.H.O., Donovan, T.M. and Nevill, M.E. (2005) Correlates of participation in physical activity for adolescent girls: A systematic review of recent literature. Journal of Physical Activity and Health, 2, 423-434.
 Salmon, J., Brown, H. and Hume, C. (2009) Effects of strategies to promote children’s physical activity on potential mediators. International Journal of Obesity, 33, S66-S73. doi:10.1038/ijo.2009.21
 Haug E., Torsheim T. and Samdal O. (2008) Physical environmental characteristics and individual interests as correlates of physical activity in Norwegian secondary schools: The health behaviour in school-aged children study. International Journal of Behavioral Nutrition and Physical Activity, 5, 47. doi:10.1186/1479-5868-5-47
 Haug, E., Torsheim, T., Sallis, J.F. and Samdal, O. (2010) The characteristics of the outdoor school environment associated with physical activity. Health Education Research, 25, 248-256. doi:10.1093/her/cyn050
 Prins, R.G., van Empelen, P., Velde, S.J.T., Timperio, A., van Lenthe, F.J. and Tak N.I., et al. (2010) Availability of sports facilities as moderator of the intention-sports participation relationship among adolescents. Health Education Research, 25, 489-497.
 Colabianchi, N., Maslow, A.L. and Swayampakala, K. (2011) Features and amenities of school playgrounds: A direct observation study of utilization and physical activity levels outside of school time. International Journal of Behavioral Nutrition and Physical Activity, 8, 32
 Maddison, R., Jiang, Y., Hoorn, S.V., Mhurchu, C.N., Exeter, D. and Utter J. (2010) Perceived versus actual distance to local physical-activity facilities: Does it really matter? Journal of Physical Activity and Health, 7, 323-332.
 McCormack, G., Giles-Corti, B., Lange, A., Smith, T., Martin, K. and Pikora, T.J. (2004) An update of recent evidence of the relationship between objective and self-report measures of the physical environment and physical activity behaviors. Journal of Science and Medicine in Sport, 7, 81-92. doi:10.1016/S1440-2440(04)80282-2
 Sallis J., Prochaska J. and Taylor W. (2000) A review of correlates of physical activity of children and adolescents. Medicine & Science in Sports & Exercise, 32, 963-975.
 Van der Horst, K., Paw, M.J.C.A., Twisk, J.W.R. and Van Mechelen, W. (2007) A brief review on correlates of physical activity and sedenta-riness in youth. Medicine & Science in Sports & Exercise, 39, 1241-1250.
 Thompson, J.K., Heinberg, L.J., Altabe, M.N. and Tantleff-Dunn, S. (1999) Exacting beauty: Theory, assessment, and treatment of body image disturbance. American Psychological Association, Washington DC.
 Abbott, B.D. and Barber, B.L. (2011) Differences in functional and aesthetic body image between sedentary girls and girls involved in sports and physical activity: Does Sport Type Make a Difference? Psychology of Sport and Exercise, 12, 333-342.
 Rauste-von Wright, M. (1989) Body image satisfaction in adolescent girls and boys: A longitudinal study. Journal of Youth and Adolescence, 18, 71-83.