Introduction:
The COVID-19 pandemic, has emerged as an ongoing global public health issue caused by SARS-CoV-2. National restrictive measures were applied globally to reduce community transmission of COVID-19.

Aim:
We assessed dietary habits and weight course during and after the implementation of national lockdown measures.

Methodology:
We performed a quantitative synchronic study that took place in 01/04/2021-30/04/2021(during quarantine) and 01/06/2021-30/06/2021 (after quarantine) in Greece. All 300 participants were assessed during the two time periods and were asked to answer 1. the MedDiet questionnaire, 2. the IPAQ questionnaire, 3. the quantitative 24-hour nutritional assessment method of recall.

Results:
Of the participants, 70.3% were female and only 9% had a history of COVID19. Most participants belonged to the age group 20-40 years (48,3%). We observed that both men and women increased consumption of all food groups after the quarantine measures. During the 2nd assessment period they did not approach the recommended daily portions. The majority of the participants (58%) managed to maintain a stable body weight and BMI. Adequate coverage % dri nutrient percentage, specifically for fat, carbohydrates for both sexes was shown. Moreover, the coverage rate in protein intake was better for females (82.6%) whereas the same was not the case for males (64.5%). There was a deficient daily intake of vitamin C (61.7% and 57.3%) and selenium (27.3% and 19.8%), but women (109%) were able to meet their daily zinc requirements completely in contrast to men (86.43%). Selenium, iron, magnesium, phosphorus, calcium and folate consumption did not differ between the two time periods. We did not observe differences in physical activity of the participants.

Conclusions:
Based on our findings the influence of the restrictive measures did not affect the weight while % dri nutrient coverage was adequate in most macronutrients and micronutrients.