Social-emotional skills have been an important object of study in recent years due to their relationship with academic, personal and professional success. The aim of this study was to analyse the relationship between these skills and different influential variables. The participants had a mean age of 14.18 years. The instruments used were the Social Emotional Competence Questionnaire (SECQ) and the Physical Activity Questionnaire for Adolescents (PACQ-A). Generally, the results indicated gender differences and no influence of age. Those who engaged in after-school activities scored higher on social awareness. In addition, artistic and musical extracurricular activities were associated with social-emotional skills, whereas sports activities were not. It was also found that the physical activity index was not related to socioemotional factors, except in self-awareness and in a negative way. It is necessary to analyse the quality of the extracurricular programmes offered and the training of the professionals in charge of their development. It also seems important to take into account the gender perspective in competence work, increasing self-management in girls and relationship management in boys.