Objective To investigate the current status of sports nutrition-related knowledge

attitude and practice among bodybuilding populations from gyms or fitness centers

so as to provide scientific evidence to enhance the sports nutrition knowledge level of bodybuilding populations and improve their dietary behaviors.Methods A total of 200 members from 4 randomly selected fitness centers or gyms in Yuzhong District

Chongqing participated in this questionnaire-based survey.Data were collected and statistically analyzed.Results One hundred and seventy-five respondents（87.5%）agreed that"protein plays a major role in muscle repair";64（32.0%）had a misunderstanding that"intake of high-carbohydrate foods after 5 pm would increase weight";146（73.0%）had a misunderstanding that"muscle energy is mainly derived from protein during sporting".As for the"importance of dietary nutrition for exercise ability"

153 respondents（76.5%）chose"very important"

44（22.0%）chose"important"

and 3（1.5%）believed "this was not important".However

only 39 respondents（19.5%）complied with the dietary plan specifically designed for fitness exercise.Since their participation in fitness exercise

74 respondents（37.0%）reported that they paid particular attention to adjusting the ratio of the three capacity nutrients;100（50.0%）ate less unhealthy food merely based on their experience;and 26（13.0%）did not make any dietary changes.Their main source of information about sports nutrition was "mobile phone and Internet"（178

89.0%）

and their main interests in sports nutrition-related knowledge included weight loss（79.0%）

daily dietary regimen（78.5%）

muscle mass increase（66.0%）

food cooking（52.5%）

proper selection of snacks（51.0%）and sports beverages（46.0%）.Conclusion The bodybuilding populations from gyms or fitness centers have an incomplete understanding of sports nutrition

but generally hold a positive attitude towards sports nutrition.The fitness industry

body-builders

and nutritionists should work together to effectively enhance the sports nutrition knowledge level and promote the transformation from positive attitude to healthy behaviors.