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PURPOSE Students who study intensively in one of Japan's 'cram schools' and/or spend excess time on electronic devices such as video games are in a sedentary state much of the time, and this may affect their physical fitness. We investigated whether there are relationships among obesity, physical fitness and academic achievement in Japanese students after(More)
OBJECTIVE A longitudinal study was analyzed to clarify relationships between infant lifestyle, obesity, features of family life and adolescent obesity. SUBJECTS AND METHODS Subjects in the present study were born between April 1987 and March 1991, in Enzan City, Yamanashi prefecture. Infant height and weight were measured and questionnaires were collected(More)
This study evaluated the effects of two different types of tennis lessons-those involving a technique-based approach (TBA) and those involving a game-based approach (PLAY+STAY [P+S])-on the executive functions (EFs) of junior tennis players. Eighty-one tennis players (6-12 years old) were recruited and assigned to one of three groups: TBA, P+S, or watching(More)
This study evaluated the association between the frequency of tennis play and executive function in children and adolescents. One hundred and six junior tennis players (6-15 years old) participated in this study. Executive function, including inhibitory control, working memory, and cognitive flexibility were evaluated at rest. Females showed better(More)
The purpose of this study was to evaluate the relationship between sports experience (i.e., tennis experience) and executive function in children while controlling for physical activity and physical fitness. Sixty-eight participants (6-12 years old, 34 males and 34 females) were enrolled in regular tennis lessons (mean = 2.4 years, range = 0.1-7.3 years)(More)