Please fill in the below so that we can pass this on to the Maratona organisers, they will then contact you with further information. As like many events in Europe, you need to get a medical ceritficate. It is quite easy to do. Go to your GP and ask them to fill out this form https://www.maratona.it/public/sitemin/Template_medical_certificate.pdf - I would advise to do this sooner rather than later.
There is more information on the medical certificate here: https://www.maratona.it/en/mandatory-medical-certificate
Apologies for any funny English, the fields are copied direct from the organisers.