I have been seeing and hearing about what appears to be an increase in posterior tibial tendonitis in runners. It does make some sense due to the increasing trend to barefoot or minimalist running and the running forms that require a forefoot strike. All of these running techniques do increase the work that the posterior tibial muscle has to do, so no wonder there has been an increase in posterior tibial tendonitis. These running forms do however decrease the load on other muscles, so it’s a matter of assessing each individual runner to decide which tissues need to be offloaded. If you have a history of posterior tibial tendonitis you are better of heel striking in the long term.