The sampling carried out was non-probabilistic and incidental. Inclusion criteria included being professional football players or coaches in the Valencian Community. A two-hour training intervention was conducted by a CPR-B instructor. The first 30 minutes were dedicated to explaining how to recognize a cardiopulmonary arrest, the correct technique for chest compressions, ventilations, and AED use. The remaining 90 minutes were for practical application of the intervention. This was conducted with five CPR-B training torsos (Little Anne QCPR training mannequin, Laerdal) and a simulated AED for CPR training (AED Practi-Trainer - Bilingual, WNL). Both theoretical and practical training were provided by a basic life support instructor from the Spanish Society of Intensive Care Medicine and Coronary Units (SEMICYUC), instructing participants under the 2021 European Resuscitation Council (ERC) recommendations.

A two-hour training intervention was conducted by a CPR-B instructor. The first 30 minutes were dedicated to explaining how to recognize a cardiopulmonary arrest, the correct technique for chest compressions, ventilations, and AED use. The remaining 90 minutes were for practical application of the intervention. This was conducted with five CPR-B training torsos (Little Anne QCPR training mannequin, Laerdal) and a simulated AED for CPR training (AED Practi-Trainer - Bilingual, WNL). Both theoretical and practical training were provided by a basic life support instructor from the Spanish Society of Intensive Care Medicine and Coronary Units (SEMICYUC), instructing participants under the 2021 European Resuscitation Council (ERC) recommendations.

The goal is to evaluate the change in attitudes and knowledge about CPR-B in football professionals following a training intervention and to examine its correlation with sociodemographic variables. Validated questionnaires were used to assess the attitude towards helping others in CPR-B for both lay first responders and healthcare professionals(19) and those by Chein and Oteir to assess CPR-B knowledge(20-21). Additionally, some questions about CPR knowledge, based on the CPR knowledge questionnaire by Pivač and his team(19), were added and validated by an expert committee to check their relevance. The resulting questionnaire, comprising 48 items, was analyzed before and after the intervention, and statistical analysis was conducted on the sociodemographic variables (gender, education level, role of participants).