Est-ce qu'il est recommandé de faire du sport si on est atteint du Facteur V Leiden? Quel sport et avec quelle fréquence et intensité?

Exercise is great. It helps keep our hearts healthy and keeps our blood moving. Unless your doctor specifically tells you to avoid certain kinds of exercises, get moving. Swimming is a great way to get cardio while being low impact on your legs.
Also standing up periodically and walking around for a few minutes if you sit for long periods of time is very good to prevent clot formations. Sitting with your legs propped up is a great way as well to reduce any swelling and help move blood from your legs.