The accomplishment of a treatment with Intratissue Percutaneous Electrolysis of additional form to the accomplishment of eccentric exercises and stretching program in patients with chronic lateral epicondyle tendinopathy is more effective than the accomplishment of an additional treatment with dry needling or eccentric exercises program realized of isolated form.

Experimental study randomized with double blind, whose purpose is to compare three protocols in those who apply different protocols of physical therapy to themselves in three groups of intervention with patients with chronic lateral epicondyle tendinopathy.

There take part in this study people of both sexes, with ages between 18 and 65 years, all of them present chronic lateral epicondyle tendinopathy.

Inclusion Criteria:

• Age between 18 and 65 years.
• Patients diagnosed of chronic lateral epicondyle tendinopathy with a minimum of 3 months of evolution.
• Pain when palpating the lateral epicondyle area.
• Positive test in at least 1 of the following 3 clinical tests: Cozen, Thomson or Mill's
• Have the capacity to perform all clinical tests, understand the study process, and obtain informed consent.

Exclusion Criteria:

• Previous history of direct trauma, fractures, joint instability, surgery or rheumatic alterations of the lateral epicondyle area.
• Full elbow extension limited.
• Alterations at cervical level such as: cervical radiculopathy (C4-C7), degenerative pathology in the cervical spine, exacerbated pain increase with neck movements or cervical compression.
• Symptoms compatible with entrapment of the posterior interosseous nerve.
• NSAID intake the week before the intervention;
• Have received treatment with infiltration in the last year;
• Have received physiotherapy treatment during the last month.