TY  - JOUR
PY  - 2016//
TI  - Does activity space size influence physical activity levels of adolescents? - a GPS study of an urban environment
JO  - Preventive medicine reports
A1  - Lee, Nolan C.
A1  - Voss, Christine
A1  - Frazer, Amanda D.
A1  - Hirsch, Jana A.
A1  - McKay, Heather A.
A1  - Winters, Meghan
SP  - 75
EP  - 78
VL  - 3
IS  - 
N2  - BACKGROUND: Physical activity (PA) is closely linked with child and youth health, and active travel may be a solution to enhancing PA levels. Activity spaces depict the geographic coverage of one's travel. Little is known about activity spaces and PA in adolescents. <br><br>OBJECTIVE: To explore the relation between adolescent travel (using a spatial measure of activity space size) and daily moderate-to-vigorous PA (MVPA), with a focus on school days. <br><br>METHODS: In Fall 2012, we used Global Positioning Systems to manually identify trips and generate activity spaces for each person-day; quantified by area for 39 students (13.8±0.6 years, 38% female) attending high school in urban Downtown Vancouver, Canada. We assessed the association between activity space area and MVPA using multi-level regression. We calculated total, school-day and trip-based MVPA for each valid person-day (accelerometry; ≥ 600 min wear time). <br><br>RESULTS: On school days, students accrued 68.2 min/day (95% CI 60.4-76.0) of MVPA. Daily activity spaces averaged 2.2 km(2) (95% CI 1.3-3.0). There was no association between activity space size and school-day MVPA. Students accrued 21.8 min/day (95% CI 19.2-24.4) of MVPA during school hours, 19.4 min/day (95% CI 15.1-23.7) during travel, and 28.3 min/day (95% CI 22.3-34.3) elsewhere. <br><br>CONCLUSION: School and school travel are important sources of PA in Vancouver adolescents, irrespective of activity space area covered.<p />  <p>Language: en</p>
LA  - en
SN  - 2211-3355
UR  - http://dx.doi.org/10.1016/j.pmedr.2015.12.002
ID  - ref1
ER  -