Relationships Between Problematic Internet Use, Physical Activity, and Mental Health in University Students

This study examined associations between problematic Internet use, video game addiction, physical activity, perceived physical fitness, and psychological distress in pre-service teachers. A cross-sectional survey was completed by 404 education students from the University of La Laguna using validated measures (CERI, Vela Test, IPAQ-short, IFIS, GHQ-28). Descriptive, correlational, group-comparison, and binary logistic regression analyses were conducted. The prevalence of video game addiction was low (4%), and problematic Internet use was rare (1%), although 25.3% showed moderate-risk Internet use. Within the small group of students with video game addiction, male students showed relatively higher risk scores; however, this was not significantly associated with physical or emotional well-being. Problematic Internet use was positively associated with psychological distress (r = 0.267, p < 0.001) and poorer physical health indicators. Perceived physical fitness was inversely associated with distress (r = −0.248, p < 0.001) and, together with problematic Internet use, emerged as the strongest predictors with clinically relevant distress (GHQ ≥ 13) in the logistic model. A focus group (n = 4) provided exploratory qualitative insights into participants’ perceptions of digital behaviours, particularly regarding perceived loss of control and its potential associations with academic, physical, and emotional well-being.