RT Journal Article T1 Burnout syndrome according to psychological inflexibility in volleyball coaches A1 Arbinaga, Félix A1 Díaz Ceballos, Isabel A1 Gutierrez Fernández, José Nicasio A1 Díaz Rodríguez, Joaquín K1 Burnout K1 Psychological Inflexibility K1 Mental Health K1 Volleyball Coaches AB This 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. PB Springer YR 2026 FD 2026 LK https://hdl.handle.net/10272/28032 UL https://hdl.handle.net/10272/28032 LA eng NO Arbinaga, 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-x NO Psicología Deporte, Salud, Burnout, Psychological Inflexibility, Mental Health, Volleyball Coaches NO Funding for open access publishing: Universidad de Huelva/ CBUA. This work has been funded in part by the EPIT‑UHU support to the CTS‑980 Research Group DS Repositorio Institucional de la Universidad de Huelva RD 31 may 2026