DEAR MAYO CLINIC: I am in my early 40s. During the COVID-19 pandemic, I didn’t get as much exercise and I gained some weight. I now feel like I have less energy. I was previously infected with COVID-19. Is it safe to start exercising again in a crowded gym so that I can work out, lose some weight and gain some energy? Should I wear a mask?
ANSWER: Regular physical activity and structured exercise can benefit people of all ages and physical abilities. These benefits include improvements in overall health, fitness and quality of life, as well as a reduction in the risk of chronic conditions such as heart disease, Type 2 diabetes, dementia and certain types of cancer. Regular exercise also can help maintain healthy body weight, improve mood and feelings of energy, reduce anxiety, and promote good sleep.
The Centers for Disease Control and Prevention (CDC) and the World Health Organization acknowledge that regular physical activity and exercise are not only safe, but necessary to promote the health benefits described above. The risk of experiencing more severe COVID-19 symptoms is greater among people with conditions such as obesity and high blood pressure — both of which can be beneficially modified by regular physical activity. Furthermore, regular moderate intensity exercise helps boost immune function, which can protect against or reduce disease severity if you were to become reinfected with COVID-19. This may be why major research findings published in Mayo Clinic Proceedings and the British Journal of Sports Medicine suggest that meeting physical activity guidelines and having greater fitness decrease the likelihood of a severe COVID-19 infection.
You may have heard it said that exercise is “aerosol-generating.” During exercise, the amount of air moved in and out of the lungs increases. This means that, like coughs and sneezes, exercise can increase the number of particles released into the surrounding environment. The virus that causes COVID-19 likely spreads in these respiratory particles.
As COVID-19 vaccination rates increase, CDC guidance on the use of masks and social distancing is regularly updated. When considering how to safely take part in physical activity or structured exercise, you are advised to follow current public health guidance.
Exercising outdoors and avoiding large groups of people is preferable, especially if you are not yet fully vaccinated for COVID-19. If you wish to exercise in a community gym, then maintaining appropriate distance between you and others, and wearing a mask, is advisable. If you prefer to exercise indoors, consider doing so in the comfort and safety of your home.