Classroom Teachers' Perceived Barriers to Implementing Comprehensive School Physical Activity Programs (TPB- CSPAP): Instrument Development.

Although physical education teachers generally act as the physical activity champion and promote adherence to whole-school physical activity programs, classroom teachers manage the majority of students' access to movement throughout the school day. Purpose: To support the adoption of a whole-school physical activity program, this study developed an instrument that identifies barriers perceived by classroom teachers related to adopting this type of program in their school. Method: A four-step process provided the conceptual framework for this instrument development (literature review, expert review, quantitative evaluation, and validation). The final validation phase (N = 520 teachers) included two individual analyses to separately evaluate respondents from elementary (K-5) and secondary levels (6-12). Each group was randomly split to run exploratory factor analysis (EFA) and confirmatory factor analysis (CFA) of the models. Results: CFA results support models with adequate fit to the data for barriers for elementary, e.g., (SRMR = 0.0726; Bentler CFI = 0.92.79) and secondary (SRMR = 0.0813; Bentler CFI = 0.9374) teachers for whole-school programming. Conclusion: This instrument can be used by school personnel and researchers to understand perceived barriers for classroom teachers to implement a whole-school physical activity program in their context and then follow up to remove or reduce the barriers.