Abstract
The purpose of this project was to develop and validate an instrument to assess the sports nutrition knowledge of adult athletes. An evidence-based, mixed-methods process was employed to establish face/content validity (expert review), construct validity, (Independent t test and Mann-Whitney U test), internal consistency (Cronbach [alpha]), and test-retest reliability (Pearson [rho]). Results confirmed content and construct validity (mean total score for registered dietitian nutritionists compared with the athletes 38.5 +/- 5.3 vs 15.9 +/- 9.2; P < .001), internal consistency (0.843), and reliability (r = 0.951; P < .001). The 49-item Sports Nutrition Knowledge Instrument (49-SNKI) can be a valid and reliable instrument used to measure sports nutrition knowledge of adult athletes.