Eccentric hamstring strengthening exercise
Here's a series of exercises for the treatment of proximal hamstring tendinopathy. Also called "buttocks pain", this pathology in runners is characterized by a well localized pain just under the buttock fold. These eccentric exercises shall be done one after the other, for 2 sets of 20-40 repetitions each, and can be done daily. The exercises can be made more difficult by increasing the load or the tension on the elastic.