Environment perception and leisure-time physical activity in Portuguese high school students

This study aims to analyze the association between perceived environmental factors and leisure-time physical activity (PA) among adolescents of both genders. Data were collected in autumn of 2011 from 866 adolescents (412 girls and 454 boys) 12- to 18-years-old, from four Portuguese cities. Perception of environmental factors was assessed by Assessing Levels of Physical Activity and Fitness (ALPHA) questionnaire (Spittaels et al., 2010, IJBNPA)....