Problem Statement: Staying and working at home due to SARS-CoV-2 pandemic, caused a lack of physical activity and lead people to be more inactive and incent to consume more unhealty food during the day comparing with pre-pandemic. Balanced nutrition and physical activity are important in terms of keeping body composition values at optimum and therefore staying healthy. Approach: Many factors exist that could affect body composition values, however, balanced nutrition and physical activity are foremost effective. These, in particular, affect the body's fat-muscle ratios and body mass index (BMI). Purpose: In the study, it was aimed to examine the relationship between body composition values and nutrition and physical activities of the three-month quarantine period due to the SARS-CoV-2 (Covid-19) pandemic. For this purpose, body composition values of 16 subjects before and after the quarantine period were evaluated in terms of weight, body fat mass, total body water, mass out of fat, visceral fat, obesity, body mass index, muscle mass. Results: Nutrition and physical activity data of the subjects were determined by examining the questionnaire applied to the subjects. A significant correlation (p <0.05) was found between the obesity value and the subjects who consumed the same or less food during quarantine comparing with pre-pandemic. Moreover, it was observed that there were statistically significant decreases (p <0.05) in the weight, body fat mass, obesity and visceral fat values, and a remarkable decrease (p <0.001) in BMI value of the subjects who had to work during the quarantine. Conclusions: Hereby; it is seen that stable nutrition and work-life positively affect body composition values. It was determined that specifically, the working subjects ameliorate their body composition values, thus may have better health.