Social support
Based on the scale developed by Sallis et al. [Factor analysis with Principal Components method and Varimax rotation with Eigenvalue 2 as a cut of point to limit the number of domains was performed. The suggested factor solution explained 54.7% of the total variance. Both family and friend variables loaded to one domain for diet encouragement (Eigenvalue 3.3) and diet discouragement (Eigenvalue 2.7). However, as the family and friends’ variables did not correlate closely, both dimensions were divided in two domains: encouragement healthy diet family (5 questions) and friends (5 questions); discouragement healthy diet family (5 questions); and friends (5 questions). Similarly, for PA support (rewards and punishment s) all variables loaded in one dimension (Eigenvalue 2.2) but were divided in two domains: family (3 questions); and friends (3 questions). For PA participation, variables loaded to two different domains: PA participation family (Eigenvalue 5.0, 10 questions); and PA participation friends (Eigenvalue 12.0, 10 questions).Cronbach’s Alphas were calculated for each domain. For diet domain Cronbach’s Alphas ranged from 