What is sinus tarsi syndrome? I mean it sounds like a complicated name but it’s not really a complicated condition. The “sinus” means basically like a tube or a passageway and “tarsi” refers to the rear foot bones in your foot. So the tarsal bones are the big bone in your rear foot like the calcaneus heel bone or the talus that sits on top of the heel bone and sits underneath your tibia and your ankle joint. Those are the greater tarsal bones.

Sinus Tarsi is actually a tunnel that runs between the talus and the heel bone. Your subtalar joint, the joint under which is important and runs under the neck of the talus in your subtalar joint and it’s a little cavity that has some fat, it has some nerve endings and it has some fluid that lubricates the joint.

But sometimes you can get inflammation on the tissue that lines that joint and when you get inflammation of the lining of that joint and it hurts, that’s sinus tarsi syndrome.

Today on the Doc On The Run podcast were talking about Sinus Tarsi syndrome on runners.