Eccentric exercises are considered to be the gold standard for treating tendinopathy. An eccentric exercise, such as a heel lower in the Alfredson’s Protocol for the Achilles tendon, is an exercise where the muscle lengthens as it contracts. There are many theories on how an eccentric exercise helps with Achilles tendinopathy but the exact mechanism is not well understood. In this post, we will discuss how from a biomechanical standpoint can be used to treat Achilles tendinopathy.