The Timeout in Sports: A Study of Its Effect on Volleyball Fernández Echeverría, Carmen González Silva, Jara Castro, Inma T. Perla Moreno, M. Coach management Formative stages Binary logistic regression Volleyball Timeouts The purpose of this study was to analyse the variables (lost rallies and score difference) that determine the timeout effect (positive or no effect) in volleyball, in balanced and unbalanced sets. 232 timeouts, requested by the coaches of 66 male and female teams participating in the Spanish Championship in the Under-14 and Under-16 categories, were analysed. The variables considered in this study were timeout effects, lost rallies and score differences. To analyse the timeout effect, a binary logistic regression model was applied. The results of this model show that, in balanced sets, the variables that predict the timeout effect are the number of rallies ( 2 lost rallies) and the score difference (2–3 points), whilst in unbalanced sets, and the variable that predicts the timeout effect is the number of lost rallies (3 lost rallies). These results show the importance of bearing these variables in mind when timeouts are managed and requested by coaches, in order to optimise the team’s performance. 2019-12-11T12:56:51Z 2019-12-11T12:56:51Z 2019-10-29 journal article Fernández-Echeverría C, González-Silva J, Castro IT and Moreno MP (2019) The Timeout in Sports: A Study of Its Effect on Volleyball. Front. Psychol. 10:2437. http://hdl.handle.net/10481/58261 10.3389/fpsyg.2019.02437 eng http://creativecommons.org/licenses/by/3.0/es/ open access Atribución 3.0 España Frontiers Media