Arbinaga, FélixDíaz Ceballos, IsabelGutierrez Fernández, José NicasioDíaz Rodríguez, Joaquín2026-03-022026-03-022026Arbinaga, F., Díaz-Ceballos, I., Gutiérrez-Fernández, J.N. & Díaz-Rodríguez, J. (2026). Burnout syndrome according to psychological inflexibility in volleyball coaches. Sport Sciences for Health, 22:100. https://doi.org/10.1007/s11332-026-01693-xhttps://hdl.handle.net/10272/28032Psicología Deporte, Salud, Burnout, Psychological Inflexibility, Mental Health, Volleyball CoachesThis study examined the relationship between psychological inflexibility and burnout in volleyball coaches. A total of 187 federated coaches participated (72.7% male). Psychological inflexibility was measured using the Acceptance and Action Questionnaire; burnout was assessed using the Athlete Burnout Questionnaire. Women showed higher scores in psychological inflexibility, but after conducting a cluster analysis, results showed no gender‑based differences in psychological inflexibility clusters. However, female coaches were more likely to fall into high-burnout categories. After conducting a regression analysis, psychological inflexibility was shown to be a relevant predictor of exhaustion, with a 4.3 fold increased risk of developing high levels of burnout (OR = 4.328). Neither coaching qualifications nor competitive level were associated with burnout. These findings highlight a significant link between inflexibility and burnout, underscoring the need for further research in sports settings.engAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/BurnoutPsychological InflexibilityMental HealthVolleyball CoachesPsicología DeporteSaludEntrenadoresBurnoutInflexibilidad Psicológicajournal article10.1007/s11332-026-01693-xopen access3201.05 Psicología Clínica