Consequences of COVID-19 pandemic on weight gain and physical activity: a prospective cohort study from Italy

Introduction: It is crucial to monitor changes in body weight and physical activity (PA) to understand if short-term effects of COVID-19 pandemic have had implications over time. Methods: This longitudinal study is based on data from 4,831 Italians aged 18-74 years interviewed during the first phase of COVID-19 pandemic (April-May 2020) and two years later (February-March 2022). Changes in body weight and PA were assessed through multivariable analyses in association with socio-demographic and psychological characteristics. Results: Over the two years, 17.4% reported a weight gain of at least 5 kg and 32.8% a decreased PA by at least 4 hours per week. Weight gain and decreased PA were more frequent in participants from the less wealthy areas, with lower educational level and those who reported a worsening in mental health. Conclusions: After two years from the start of the pandemic, in Italy we observed a trend toward a renormalization of body weight and PA. The segments of the population mostly affected by the pandemic are subjects with more disadvantaged socio-economic status and with an impaired mental health.