Inclusion Criteria:  ≥ 18 years of age, the presence of heel pain ≥ 3 months duration unresponsive to first-choice conservative treatments (non-steroidal anti-inflammatory and/or other analgesic drugs, exercise program, insoles), specialist diagnosis of plantar fasciitis confirmed with clinical examination, pain intensity ≥ 5 at the Visual Analog Scale (VAS)  Exclusion Criteria:  previous ankle/foot fracture or surgery, previous ankle/foot infections, neurological deficits of the lower limbs, diagnosis or suspect of fibromyalgia, local steroid injection within the previous 3 months, diabetes mellitus, vascular diseases