Hip osteoarthritis (OA) is one of the most prevalent chronic disease in the world. Clinical guidelines recommend non-pharmacological conservative treatments for the management of OA. Hip flexors seems to play an important role in the development of hip OA but there is no published studies evaluating the results of a stretching protocol of hip flexors in hip OA patients.

The objective of this trial is to evaluate if a stretching protocol of hip flexors is more effective in symptoms, functional capacity , range of motion, strength, muscular length, pain threshold and anxiety and depression compared to control.

For this purpose the investigators conduct a single-group, pretest-posttest clinical trial.The investigators included patients diagnosed of hip osteoarthritis Grade I-III by Scale of Kellgren and Lawrence.

The variables are measured at the beginning and at the end of treatment of the control phase, and at the end of the stretching protocol phase.

Inclusion Criteria:

• Diagnosed medically with a X-Ray test
• American College of Rheumatology Criteria

Exclusion Criteria:

• Secondary osteoarthritis by a traumatism, Paget disease, inflammatory or metabolic disease, congenital diseases etc.
• Vascular or neurological disease.
• Musculoskeletal pathologies in lumbar spine, pelvis or lower limbs
• Grade IV in Kellgren and Laurence Scale

The patient data were confidential and were assigned a number to each patient to maintain confidentiality