BACKGROUND: Plantar fasciitis is one of the most common causes of pain in the inferior heel and is very frequent in some running sports. It affects up to 10% of general population and accounts for 11% to 15% of all foot pain symptomatology. Several treatments have been suggested, but there is no evidence supporting a specific conservative management strategy. AIM: Evaluation of the efficacy of combined cryoultrasound therapy on chronic plantar fasciitis with heel spurs resistant to pharmacological and instrumental therapies. DESIGN: Single-blind randomized clinical trial. POPULATION: 102 consecutive patients affected by chronic plantar fasciitis with painful symptomatology for at least 6 months, intensity of pain higher than 5 on the VAS score, presence of heel spurs, use of plantar orthoses and ineffectiveness of previous therapies. METHODS: The patients were randomized into two groups: group A treated with cryoultrasound therapy and group B with cryotherapy. Our protocol was based on 10 daily treatments, lasting 20 minutes. Each participant was evaluated using VAS score before (T0) the treatment and 3 months (T1), 12 months (T2) and 18 months (T3) after. Effectiveness index was calculated from T1 to T3. RESULTS: Both treatments have been found effective. The difference in pain intensity on the VAS scale between the two groups at T2 was 4.35 points in favor of group A (IC 95% 3.75 to 4.95; p < 0.001), reaching the primary end point. The difference in pain intensity on the VAS scale between the two groups at T1, T2 and T3 was 3.00, 4.35 and 4.81 respectively, showing a statistically significant difference between VAS average scores at all follow-ups in favor of group A. Scores of at least 66% at the effectiveness index were only achieved in group A (p values < 0.001). CONCLUSION: Cryoultrasound therapy could be an efficient treatment option for chronic plantar fasciitis.

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