Twenty five people with Achilles tendinopathy (AT) and 25 people without AT will participate in this single visit clinical study. Participants will rate their pain with pressure to the heel, leg and elbow, climb stairs and perform a novel task in a motion capture system, and complete questionnaires on how pain affects their daily life. All subjects will complete these measures twice, and for participants with AT they will complete this battery of tests before and after an anesthetic injection to the area of pain. This study has 2 aims: