This study aimed to determine the description of the diet and physical activity in students of the Faculty of Medicine related to obesity. This type of research is descriptive research with the cross-sectional method. The population in this study were all preclinical students of the Faculty of Medicine. The samples in this study were preclinical students from the class of 2015 with a sampling technique, namely the purposive sample technique. Primary data were obtained from questionnaires. Univariate analysis with frequency distribution analysis. The results of the study on students of the Faculty of Medicine from 180 respondents there were 23 people (13%), normal weight 112 people (62%), pre-obesity 33 people (18%), obesity as many as seven people (4%), and obesity II as many as five people (3%). Students who were pre-obese, obese I, and obese II were doing light activities as many as 15 people, 20 people doing moderate activities, and ten people doing strenuous activities. Students who have pre-obesity, obesity I, and obesity II are known as many as 20 people rarely consume fast food, and as many as 25 people often consume fast food.

Background: Obesity is an excessive fat accumulation in the body. Excessive consumption of carbohydrates, protein, and fat can increase the risk of obesity. It occurs when there is an imbalance between the energy number that goes through food and the energy that comes out through physical activity. Objectives: This study aimed to know the relationship between carbohydrate, protein, and fat consumption and obesity among the 2014 UKI Faculty of Medicine Students. Methods: This study was analytical observational research with a case-control design. The samples were 68 students from batch 2014. The data are analyzed by SPSS using Chi-square and logistic regression. Results: A total of 27.9% of students were obese, of which 33.3% were male and 25.5% were female. Based on the results of bivariate analysis, there was a significant relationship between obesity and protein consumption (p=0.048) and fat consumption (p=0.035), while there was no correlation between obesity incidence and carbohydrate consumption (p= 0.373). Conclusions: The incidence of obesity in UKI Medicine Students batch 2014 was caused by the high consumption of fat and protein. It was not caused by the consumption of carbohydrates.