A comprehensive functional performance assessment battery development and validation among football players.

Background: Skill and health-related components are required for the assessment of football players' functional performance, and there is a lack of literature available to measure football players' functional performance. The study mostly focuses on developing and validating the tool for football players between the ages of 18 and 25. Methods: This study used a research methodology that focused on the development and verification of a scale. The research consisted of two distinct stages, namely tool development and validity testing. Firstly, the expert panel did a comprehensive analysis of the items and domains of the questionnaire. Subsequently, the Delphi approach was used to assess the content validity of the questionnaire. Later on, the evaluation tool was officially named the complete functional performance assessment battery (CFPA) for football players in India. Result: The CFPA's newly developed tool has excellent scale-level content validity, which was more than 0.78 for each item in the tool, i.e., 1 (indicated as extremely relevant), the content validity ratio was bigger than 0.49, and each item's kappa value was found to be 1, which is excellent. Each item's universal acceptance was found to be 1 for both the item's quality and content and Aiken's V index is also greater than 0.81. Conclusion: The CFPA is a valid tool in India that can be used to check the functional performance of football players. [ABSTRACT FROM AUTHOR]