|dc.description.abstract||Background: This study examined three social factors (i.e., autonomy support, structure, and
involvement) and their relationship with the motivational processes proposed by Vallerand
( 1 997). This study explored sources of support for exercise participation. -~ '
Methods: Participants (N = 425) completed self-reported instruments which assessed variables
outlined within Vallerand's ( 1 997) HMIEM.
Results: Structural equation modeling analyses predicting the cognitive/affective and exercise
behaviour accounted for 23 percent of variance in positive affect, 10 percent of variance in
negative affect, 38 percent of variance in physical self-concept, and 4 percent of variance in
exercise behaviour. Exploratory analyses revealed that friends, romantic partners, and educators
to be consistent sources for providing autonomy support, structure, and involvement, f !,< r - r*
Summary: This study is among the first to examine perceived sources oi autonomy support,
structure, and involvement from friends in the exercise context and suggest such perceptions may
contribute to motivating exercise behaviour in post-secondary students.||en_US