Effects of Physical Activity Interventions through Telegram App According to Self-Determination Approach on Psychological Variables and Physical Activity in Adolescents with Low Physical Activity

The aim of this study is to examine the effects of physical activity interventions through Telegram application on intrinsic motivation, basic psychological needs, and physical activity in adolescents with low Physical Activity. 60 boys (15-17 years old) with low physical activity were selected. Participants were randomly assigned to two equal groups including the web–based intervention group and the web–based intervention group according to self-determination approach. Interventions included 24 selective physical activities which were applied through Telegram application (3 per week, during 8 weeks). Before and after intervention, participants completed a series of specific questionnaires. The results showed that physical activity interventions with self-determination approach significantly increased intrinsic motivation and satisfaction of psychological needs. However, the effect on physical activity was not significant. At whole, these findings suggest that the use of web-based physical activity intervention according to self-determination approach can improve psychological variables related to physical activity in adolescents.