The intervention period will last 4 weeks, with a periodicity of 2 weekly sessions of 50 minutes each. The intervention of the experimental group will consist of a protocol using myofascial and proprioceptive neuromuscular facilitation techniques.

Patients included in the control group will not receive any intervention, maintaining their activities of daily living in the same way as before the study.

Three myofascial release techniques will be performed with low load and long duration stretching to the myofascial complex to restore optimal length, decrease pain and improve function. In the development of the deep myofascial techniques, respiratory synchronisation with the patient will be performed. Proprioceptive neuromuscular facilitation techniques will be performed by executing diagonal spiral movements against resistance, several times, through a full range of motion. Three sets of three repetitions with 6-second contractions and a 30-second rest between sets shall be performed.

The intensity of knee and ankle pain shall be measured with the visual analogue scale. This instrument has an excellent test-retest reliability. This measurement scale consists of an unnumbered 10 cm line, where the patient is asked to indicate the perception of pain in the knee and ankle joints in the last week. The scale ranges from 0 to 10, where 0 indicates no pain at all and 10 indicates maximum perceived pain.

Functionality of the lower limbs will be measured with the 2-Minute Walking Test. Functional capacity to exercise will be assessed by this modified version of the 6-minute version. This instrument has shown excellent test-retest reliability. This test will be performed in a closed corridor, with a length of 30 m delimited between cones. Subsequently, they shall be instructed to walk around the circuit around the cones as fast as possible, but without running, for 2 minutes. The distance covered at the end of the 2 minutes, in metres, shall be recorded by the assessor.