Purpose: The purpose of this study is to conceptualize training engagement in sport based on the theory of Academic engagement that is being spotlight in the field of educational psychology and develop a scale for it. Methods: A focus group interview and a structural survey were done to 20 coaches and 389 high school and university sport players to collect data. Grounded on the psychometrical procedure, TES’s factor structures and constructs were verified. Results: According to the study results, just like Academic engagement, TES also implies ‘the intensity of an active and voluntary intervention and the quality of emotion that players show when they begin and perform their training’, and to measure it, 16 questions’ both structure and in the four dimensions of cognitive, emotional, behavioral, and agentic were verified. These findings discuss the value of TES in the research of sport psychology and also its utilization in follow-up research.