The coronavirus pandemic caused profound changes in many aspects of people's lives, especially in the area of health behaviour. The restrictions caused by the pandemic have had negative effects on both the physical and mental health of society, while also transforming the way individuals exercise. The aim of our research was to analyse the changes in health behaviour of Hungarian adults, including their sporting habits as well as their mental health, caused by the COVID-19 pandemic. We also focused on comparing the experiences of a population that regularly participates in sport and a population that rarely or never participates in sport. Results of the survey showed that individuals who regularly participate in sport activities rated their general physical health significantly better than those living a more sedentary life. More than half of the sample stated that they did not experience any particular change in their physical health, but the second highest percentage of respondents reported that their health had been affected negatively by the pandemic period. Results also showed that almost half of respondents said that their sporting habits had not changed as a result of the pandemic, while many reported that their sporting frequency had decreased. Finally, we also analysed the changes in sporting habits with regard to the place of residence, finding that those individuals living in an apartment complex building were most likely to choose a different type of exercise from the one they had previously practised, while a higher proportion of individuals living in a suburban area, or with access to garden reported that they had started to doing sports.Our research provided partial confirmation that the pandemic had a negative effect on people's health behaviour, but given the high levels of exercise in the target group,it is not surprising that many did not experience any change in sporting habits or physical health. JEL Code: I12