Basic psychological needs during exercise. To assess the perceived need satisfaction of the participants, the Spanish adaptation of the Basic Psychological Needs in Exercise Scale was used (BPNES), which is specific for the context of physical activity and health.67 The questionnaire includes 12 items distributed in three dimensions. Four items measure autonomy (e.g. "I exercise according to what I intend to do"), four items measure competence (e.g. "I feel that physical exercise is an activity that I do very well") and the other four items measure relatedness (e.g. "I have a close relationship with the people with whom I exercise"). Previous research in the physical activity and health context demonstrated the internal reliability of the instrument.