Investigation of efficacy of theory of planned behavior in explanation of use of supplement amongnational elite wrestlers

The aim of study was to investigate efficacy of theory of planned behavior in explanation of use of supplement among national elite wrestlers. For this purpose, 146 wrestlers of national teams of Iran which participating in camps of national team during the 1389-90 years selected as sample group and were studied. For gathering the data, questionnaire of sports supplements survey (Hossman, 2006) was used. Data analyzed by path analysis. Results indicated that the TPB measurement model has poor fit. However, the components of the TPB were able to explain 59% of variance of behavioral intention. Additionally, subjective norms (β = 0/65)were the strongest predictor and perceived behavioral control (β = 0/07)was the weakest predictor. Discus: Results indicated the TPB was able to explain a considerable amount of variance in behavioral intention to consume sports supplements among elite wrestlers.