In response to the COVID-19 pandemic, many countries, including the U.S., adopted intervention policies aimed at averting the spread. However, these policies may have led to significant changes in public health behaviors. We use Google search queries to examine how state government actions are associated with people’s internet searches (internet browsing habits) related to health behaviors. We employ the differences-in-differences method to determine the link between disease outbreak, associated intervention policies, and changes in health behavior related searches. Our findings show that school closures, restaurant restrictions, and stay-at-home orders lead to a significant rise in searches for workout, physical activity, exercise, takeout, liquor, and wine. Moreover, people’s concerns regarding weight loss, diet, nutrition, restaurant, and fast food substantially decline following stay-at-home orders. Our event-study results indicate that changes in health behaviors began weeks before stay-at-home orders were implemented contemporaneously with emergency declarations and other partial closures. These findings suggest that people’s health behaviors are notably affected by state government’s intervention policies.

This paper examines the impact of stay-at-home policies on people's health behaviours towards weight gain and probable obesity attributable to imposing the order. Using Google Trends data, we investigate whether the lockdowns that were implemented in the U.S. led to changes in weight-gain-related online search behaviours. To probe the causal link between lockdown policies and changes in weight-gainrelated topics, we employ the differences-indifferences method and regression discontinuity design and we find a significant increase in the search intensity for workout and weight loss, while the search intensity for fitness, nutrition and fast food appears to have declined. Our results from using event study regression suggest that changes in health behaviours began weeks before lockdown orders were implemented contemporaneously with emergency declarations and other partial closures about COVID-19. The findings suggest that people's health-related behaviours regarding weight gain were affected by the lockdowns.