title: Differences in the intensity and duration of adolescents' sports and exercise across physical and social environments.
abstract: We used data from the American Time Use Survey (years 2003-06) to analyze whether the intensity and duration of high school students' (ages 15-18 years) sports and exercise bouts differed across physical and social environments. Boys' sports and exercise bouts were more likely to reach a vigorous intensity when taking place at school and with friends/acquaintances/other people; whereas girls' sports and exercise bouts were more likely to reach a vigorous intensity when outdoors and alone. For boys and girls, bout durations were greater at school and with friends/acquaintances/other people than in other environments. Overall, environmental influences on the intensity but not duration of sports and exercise bouts appear to differ between boys and girls.
authors.affiliation: Department of Preventive Medicine, University of Southern California, Los Angeles, 90033-9045, USA. dunton@usc.edu
authors.forename: Genevieve Fridlund
authors.initials: GF
authors.lastname: Dunton
authors.forename: David
authors.initials: D
authors.lastname: Berrigan
authors.forename: Rachel
authors.initials: R
authors.lastname: Ballard-Barbash
authors.forename: Frank
authors.initials: F
authors.lastname: Perna
authors.forename: Barry I
authors.initials: BI
authors.lastname: Graubard
authors.forename: Audie A
authors.initials: AA
authors.lastname: Atienza
mesh_terms: D000293:Adolescent; D015444:Exercise; D005260:Female; D033062:Friends; D006801:Humans; D008297:Male; D010379:Peer Group; D005082:Physical Exertion; D012737:Sex Factors; D012931:Social Environment; D012932:Social Facilitation; D013177:Sports; D011795:Surveys and Questionnaires; D014481:United States