Effectiveness of physiotherapy resources in knee osteoarthritis: a randomized controlled trial with therapeutic exercise, ear acupuncture and transcutaneous electrical nerve stimulation.

INTERVENTION: One intervention group will receive transcutaneous electrical nerve stimulation (TENS) application before therapeutic exercise. This stimulation will last 40 minutes, and will be carried out 3 times per week, in a total of 4 weeks. Conventional TENS parameters will be used. The other intervention group will have ear acupuncture sessions before therapeutic exercise. This therapy will be carried out once a week, in a total of 4 weeks, and each session will last 15 minutes. Conventional puncture ear points will be used. Both intervention groups will have therapeutic exercise after the specific therapy intervention of each group. Therapeutic exercise sessions will last 40 minutes and will be carried out 3 times per week, in a total of 4 weeks. CONDITION: knee osteoarthritis PRIMARY OUTCOME: Pain by Western Ontario and MacMaster Universities Osteoarthritis Index (WOMAC) Self related physical function by Western Ontario and MacMaster Universities Osteoarthritis Index (WOMAC) SECONDARY OUTCOME: Quantitative physical funtion by step test INCLUSION CRITERIA: To participate in the study, subjects should be women with clinical diagnose of knee osteoarthritis according to American College of Rheumatology. Besides they should have felt any pain in their knee for the last 6 months and 14 days previously allocation in this study.