title: Critical hours: physical activity and sedentary behavior of adolescents after school.
abstract: The present study examined physical activity and sedentary behavior patterns of adolescents between 15.30h and 18.30h. The sample for this study is 1,484 (boys: n = 561; girls: n = 923). Boys and girls reported 21 and 19 min of physical activity and 24 and 26 min of homework respectively during this period. Technology-based sedentary behavior (TV viewing, computer and video game use) was significantly higher in boys than girls (boys = 50 mins; girls = 35 mins; p < .05). The most prevalent behaviors after school are technology-based sedentary behavior, homework and physical activity. During these hours, engagement in physical activity does not appear to displace time spent doing homework.
authors.affiliation: Loughborough University, Leicestershire, UK.
authors.forename: Andrew J
authors.initials: AJ
authors.lastname: Atkin
authors.forename: Trish
authors.initials: T
authors.lastname: Gorely
authors.forename: Stuart J H
authors.initials: SJ
authors.lastname: Biddle
authors.forename: Simon J
authors.initials: SJ
authors.lastname: Marshall
authors.forename: Noel
authors.initials: N
authors.lastname: Cameron
mesh_terms: D000293:Adolescent; D003201:Computers; D015444:Exercise; D005260:Female; D006801:Humans; D007899:Leisure Activities; D008019:Life Style; D008297:Male; D017678:Sex Distribution; D012737:Sex Factors; D013690:Television; D006113:United Kingdom; D018910:Video Games