TY  - JOUR
PY  - 2017//
TI  - Environmental and behavioral influences of physical activity in junior high school students
JO  - Journal of physical activity and health
A1  - Lorenz, Kent A.
A1  - van der Mars, Hans
A1  - Kulinna, Pamela Hodges
A1  - Ainsworth, Barbara E.
A1  - Hovell, Melbourne F.
SP  - 785
EP  - 792
VL  - 14
IS  - 10
N2  - BACKGROUND: Increasing access and opportunity for physical activity (PA) in schools are effective; however, not everyone experiences the same effects. Prompting and reinforcement may encourage more frequent participation in recreational PA during the school day. The purpose of this study was to investigate a lunchtime PA intervention on whole-school PA participation, and if behavioral support enhanced these effects. <br><br>METHODS: A modified reversal design compared an environmental and an environmental plus behavioral support intervention on lunchtime PA participation versus baseline levels in a suburban junior high school in the western US (N = 1452). PA and related contextual data were collected using systematic observation. <br><br>RESULTS: Significantly more girls and boys were observed in PA during the interventions compared to baseline phases (F(2, 1173) = 13.52, p < 0.0001, η (2) = 0.023; F(2, 1173) = 20.14, p < 0.0001, η(2) = 0.033, for girls and boys respectively). There were no significant differences between the environmental phase and the environment plus behavioral support phase. <br><br>CONCLUSION: Providing access and opportunity significantly increased the number of girls and boys observed in PA during a lunchtime program, with no additive effects of behavioral support. Further research into providing individual-level contingencies at an institutional level is needed.<p />  <p>Language: en</p>
LA  - en
SN  - 1543-3080
UR  - http://dx.doi.org/10.1123/jpah.2016-0709
ID  - ref1
ER  -