Validation of a questionnaire to assess stress, tobacco use, physical activity, and dietary supplementation ; Validación de un cuestionario para evaluar el estrés, el tabaco, la actividad física y la suplementación alimentaria ; Validação de questionário para avaliação de estresse, tabaco, atividade física e suplementação alimentar ; Validazione di un questionario per valutare lo stress, il tabacco, l'attività fisica e l'integrazione alimentare

Introduction: Given the large expansion of gyms, reliable instruments are needed to assess and obtain information about the behavior of gym members, and these instruments may be able to assist in the implementation of planning and health promotion strategies in this population. Objective: To develop and validate a questionnaire to assess the lifestyle habits, physical activity, and dietary supplementation of gym members. Materials and Methods: A 44-item questionnaire was developed. The Delphi technique was used for content and appearance validity using the content validity index (CVI). Construct validity was verified by exploratory factor analysis (EFA) in several phases. Reliability analysis was assessed by internal consistency and temporal reproducibility using Cronbach’s alpha and the intraclass correlation coefficient (ICC), respectively. Results: Two rounds of the Delphi technique identified a total CVI of 100%. The final model was composed of eight items, with excellent quality in the EFA adjustment, and distributed into four factors. Internal consistency was adequate in all factors, with ICC 0.997, 0.916, 0.698, and 0.631. Conclusions: This study provides a reliable and valid questionnaire to assess stress, smoking, physical activity, and dietary supplementation of fitness center members. ; Introducción: Ante la gran expansión de los gimnasios, se necesitan instrumentos confiables para evaluar y obtener información sobre el comportamiento de los practicantes de gimnasia, y estos instrumentos podrán auxiliar en la implementación de estrategias de planificación y promoción de la salud de esta población. Objetivo: Desarrollar y validar un cuestionario para evaluar el estilo de vida, la actividad física y la suplementación dietética de los practicantes de gimnasia. Materiales y Métodos: Se elaboró un cuestionario de 44 ítems. Se utilizó la técnica Delphi para validar el contenido y la apariencia utilizando el Índice de Validez de Contenido (CVI). La validez constructiva fue verificada por análisis factorial ...