Researchers have found that wearing a face mask during vigorous exercise appears to be safe for healthy people.
This suggests that masks could be worn safely to reduce Covid-19 transmission between people visiting an indoor gym.
For the study, published in the European Respiratory Journal, the researchers carried out detailed testing on breathing, heart activity and exercise performance in a small group of people while they were using an exercise bike with and without a mask.
Although they found differences in some measurements between wearing a mask and not wearing a mask, they said that none of their results indicate any risk to health.
The study was by a team of researchers including Dr Elisabetta Salvioni from Centro Cardiologico Monzino, IRCCS, Milan, Italy, and Dr Massimo Mapelli and Professor Piergiuseppe Agostoni from Centro Cardiologico Monzino and the University of Milan.