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Background: People from all over the world have been affected by the COVID-19 (SARS-CoV-2) pandemic. The lockdown during the pandemic has impacted the lifestyle of most of the population. The aim of the present study is to compare the effect of COVID lockdown-1 and lockdown-2 on the lifestyle of the obese Indian population. Methods: This was a cross-sectional study conducted during the COVID-19 lockdown on obese adults. A well-structured questionnaire was developed and administered among the study population. The study was conducted in two phases (lockdown-1 and lockdown-2). A total of 390 subjects were included in the study (260 subjects in the lockdown-1 phase and 130 subjects in the lockdown-2 phase). Data on diet, sleep, stress, and physical activity were obtained and analyzed. Results: The mean age of the participants of phase-1 in the study was 41.7 ± 10.2 years and the participants of phase-2 were 44.5 ± 9.2 years. Statistically significant differences were observed between lockdown-1 and lockdown-2 in terms of monitoring of weight and other comorbid conditions, changes in the consumption of refined flour and processed foods, sugar and sugar-sweetened foods, oils and ghee, duration of physical activity, changes in the duration of sleep, and the stress levels related to COVID-19 ( P < 0.001). Conclusion: The impact of the lockdowns on health was very significant and different areas of lifestyle were affected in both the lockdowns. Weight gain was reported in both phases of the lockdown. The monitoring of health parameters, eating frequency, diet, and stress levels were affected during lockdown-1, whereas during lockdown-2, sleep duration and physical activity were affected. A comprehensive lifestyle modification plan is required to be developed to avoid these effects in the future.