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  • Author: Joana Carvalho x
  • Psychology and Behavior in Sport/Exercise x
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Jorge Mota, José Carlos Ribeiro, Joana Carvalho and Maria Paula Santos


The aim of this study is to investigate the associations between active transport (AT), nonorganized out of school physical activity (NOPA) and organized out of school PA (OPA) with BMI in Portuguese adolescents.


The sample comprised 1121 adolescents age 13 to 17 years-old, which were assigned to 1 of 4 PA groups according to the sum of participation in different physical activity behaviors outside of school [AT, OPA, and NOPA].


In boys but not in girls, BMI was lower as the participation in more PA behaviors outside school increased. For those who only carry out 1 PA behavior, AT was the most common behavior (boys = 48.9%; girls = 55.1%). On the other hand, NOPA was the most common behavior for those engaged in 2 types of PA (girls = 51.6%; boys = 46%). For those that carried out all the PA behaviors outside school OPA was the most common choice in both girls (59.5%) and boys (54%). AT, NOPA and OPA are different sources of PA outside school that accrued in different ways to the increased level of PA.


In boys but not in girls, BMI was lower as the participation in more PA behaviors outside school increased.

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Susana Carrapatoso, Greet Cardon, Delfien Van Dyck, Joana Carvalho and Freja Gheysen

This study examined the mediating effect of walking on the relationship of social support with vitality and psychological distress. Data from a sample of 2,859 older adults were used. The older adults completed the 36-Item Short-Form Health Survey vitality scale, the Global Health Questionnaire, the International Physical Activity Questionnaire, and a social support attributes questionnaire. All social support variables were positively associated with vitality and negatively associated with psychological distress. Walking mediated the associations of appreciation for (3%) and frequency of (8%) social contacts, participation in group activities (19%), closeness from family and friends (8%), and concern from people around (6%) with vitality. Walking also mediated 33% of the association between participation in group activities and psychological distress. The main findings of this study suggest that participation in group activities, as part of social support, in later life is beneficial to improve older adults’ vitality and reduces psychological distress, with walking being a strong mediator of these relationships.