Jun Kohyama, Makoto Ono, Yuki Anzai, Ai Kishino, Keita Tamanuki, Kengo Moriyama, Yoko Saito, Runa Emoto, George Fuse, Yoshiho Hatai
Factors associated with sleep duration among pupils
Pediatrics international : official journal of the Japan Pediatric Society
examine changes elementary aged childrens sleep physical activity 1week 3week school break sleep physical activity elementary children n 154 age 59 years 448 female 655 african american collected 7 weeks included 1week break two schools 3week break single school mixed regression models estimated sleep physical activity changes within groups ie 1week vs 3weeks school school break weeks compared school weeks bed times shifted 727 95 ci 575 879 754 95 ci 581 927 minutes later weekdays 1week 3week break respectively wake times shifted 1116 95 ci 943 1289 998 95 ci 805 1191 minutes later weekdays 1week 3week breaks weekdays 3week break children engaged 331 95 ci 141 522 sedentary minutes 122 202 42 fewer moderatetovigorous physical activity minutesday statistically significant changes childrens sedentary light moderatetovigorous physical activity mvpa minutes observed weekdays 1week break betweengroup differences change time sedentary 32195 ci 58 584 moderatetovigorous 13095 ci 239 20 physical activity observed childrens sleep shifted later 1week 3week breaks childrens activity changed minimally weekdays 1week school break 3week school break displaced sleep reductions activity intervention targets mitigating unhealthy weight gain extended breaks school