In case of acute sinusitis, sport should definitely be avoided, otherwise the affected person risks that the acute sinusitis becomes chronic. In chronic sinusitis, if it is a mild form, moderate exercise is recommended because it improves the blood supply to the respiratory tract. Make sure, however, that you do not practice any sports during acute episodes. Also, otherwise you should not go up to your performance limit. To be on the safe side, ask your doctor to give you the OK. A few sessions with a physiotherapist can also help you find the best sport for your symptoms. Do sports outdoors, in winter and in dry air, make sure that your nose is protected from too cold air, e.g. with a scarf.