The Alfredson protocol is a program of eccentric heel-drop exercises for treating Achilles tendinopathies - the eccentric movement is the heel drop and so this is the movement when the exercise is benefitting the Achilles tendinopathy (and so performed slowly - see below)
A pragmatic description of Eccentric Exercises for Achilles tendinopathy is provided below (2,3):
Open Image in Modal
Open Image in Modal
Open Image in Modal