Introduction: India reported the first COVID-19 case on 30 January 2020 and due to the mass and rapid spread of the disease in other countries, the Indian government took immediate steps. India observed lockdown from 22 March to 31 May 2020 with conditional relaxation after that. The schools, colleges, and workplaces continued to be closed or functioned online only. So, young age group observed a marked shift to a sedentary lifestyle. Aim: Study was aimed to assess the effect of a changed lifestyle during the lockdown on leading us to another pandemic of obesity. Methodology: An electronic questionnaire was distributed using applications like Whatsapp and Instagram to people of age group 15 to 30 years across India. The questionnaire had 3 sections -general questions, and questions related to lifestyle patterns before lockdown, and during the lockdown. Results: We received 500 responses. Study found that 60.74% of males and 64.42% of females showed an increase in BMI during the lockdown. It was observed that before lockdown 47.8% of the participants lived with family but during the lockdown, 98.6% of participants lived with their family. Sleeping hours and the number of meals taken daily increased. An unexpected increase in physical exercise was reported. Fast food, alcohol intake and smoking are reduced to a minimum. Participants also reported reductions in stress eating habits. Conclusion: The changes observed during lockdown led to an increase in BMI but participants already in the obese category reported decreased BMI. So, more participants shifted to the overweight category while the number of participants in the obese category decreased. Conclusion: We observed that more participants shifted to the overweight category while the number of participants in obese category decreased during the lockdown period.