Effect of the COVID-19 lockdown period on the physical condition, living habits, and physical activity of citizens in Beijing, China

[Purpose] We aimed to explore the effects of the COVID-19-induced lockdown in Beijing. [Participants and Methods] We distributed a web-based questionnaire survey among 1,029 Beijing citizens to inquire about their physical condition, living habits, and physical activity before and during home isolation. [Results] In the context of forced home isolation due to COVID-19, both males and females reported reductions in daily steps and weekly exercise time and significant increases in daily physical activity time and daily sitting time. The proportions of smokers, patients with metabolic syndrome, and patients with internal diseases were higher in males than in females; females had lower daily step counts and spent more time sitting. [Conclusion] The COVID-19 lockdown affected the physical condition, living habits, and physical activity of both males and females; females were more affected than males. People should be cognizant of the various effects of COVID-19 lockdowns on the body. We recommend a reasonable diet and appropriate home exercise. There is a need to develop training methods and evaluation tools for home exercises in COVID-19 lockdowns.