Abstract
Objective: To evaluate the frequency of physical activity and the supplement use by physical activity practitioners in gyms in Juiz de Fora - MG. Methods: This is an observational cross-sectional study in 13 gyms in Juiz de Fora. In this research, 283 people were interviewed, between 18 and 40 years old, both genders, all individuals enrolled who agreed to participate after signing the Informed Consent Form (ICF). It was applied a questionnaire containing questions regarding socio-cultural data, physical activity practice, supplementation and diet. Results: Of the 283 respondents, 181 were male and of these, about 55.2% used supplements. The reason for supplementation in 80.5% of respondents was the gain in muscle mass. The most commonly used supplements were WheyProtein followed by Creatine, these were related to kidney stone formation. About 12.2% of the individuals who used supplements had a history of kidney stones, and a significant value was found in the survey (p-value = 0.034). Regarding feeding, a higher protein intake was observed by muscle training practitioners who use dietary supplements associated with diet. Conclusion: There must be a correct indication of the use of supplements by a health professional for those who really need such supplements.