The Study On Relations Of BMI,Food Classification Flexibility And Bad Eating Behavior Of College Students

BMI(Body Mass Index)=weight(kg)/height square(m~2),which is the best index to evaluate human obesity,and BMI is closely related to bad eating behavior;The flexibility of food classification refers to an individual’s cognitive ability to think that food is suitable for multiple meals when classifying food.At the same time,the flexibility of food classification has an important impact on bad eating behavior.So,what is the relationship between BMI,flexibility of food classification and bad eating behavior of college students?Does food classification flexibility play a role between BMI and bad eating behavior?At present,there is no study to explore the relationship among them.Therefore,this study explores the relationship between BMI,flexibility of food classification and bad eating behavior.The first and second studies adopt quantitative research methods.In the first study,1117college students in Hebei Province were taken as the research objects,and the data were analyzed with AMOS21.0 and SPSS25.0,and the flexibility questionnaire of food classification was compiled.In the second study,619 college students in Hebei Province were selected as the research objects.Through correlation analysis and mediating analysis,the differences,correlation and intermediary effects of BMI,food classification flexibility and bad eating behavior of college students in demographic variables were investigated.In the third study,12 college students in Hebei Province were interviewed in a semi-structured way,and each interview lasted about 20 minutes.The interview data were extracted and analyzed by open coding,spindle coding and selective coding to explain how the flexibility of food classification of college students mediates between BMI and bad eating behavior.Through the above three studies,the following results are obtained:First,the food classification flexibility questionnaire includes four dimensions:breakfast,lunch,dinner and snack flexibility.The internal consistency coefficient of each dimension is above 0.88,with a total of 18 questions.Secondly,college students’BMI,flexibility of food classification and bad eating behavior are different in gender and origin.BMI of male college students is significantly higher than that of female college students.Female college students and urban college students are significantly higher than male college students and rural college students in uncontrolled,cognitive restrictive and emotional eating;The flexibility of breakfast and snacks of male college students is significantly higher than that of female college students.Thirdly,there is a pairwise correlation between BMI,flexibility of food classification and bad eating behavior of college students.Flexibility of food classification plays a partial mediating role between BMI and uncontrolled and cognitive restrictive eating,while it plays a complete mediating role between BMI and emotional eating.Fourthly,the flexibility of college students’food classification plays an intermediary role between BMI and bad eating behavior by initiating health concept and delaying discounting.Therefore,BMI,flexibility of food classification and bad eating behavior of college students are closely related.While trying to maintain normal weight,college students should also pay attention to improving their flexibility to reduce the occurrence of unhealthy eating behaviors.