Effect of a toe-walking protocol in plantar heel pain: A pilot study
Abstract Introduction/Purpose: Plantar heel pain (PHP) is one of most common disorders of the foot treated in primary care. It affects athletic and sedentary populations, with patient reports of activity-limiting pain and reduced quality of life. Recently, atrophy of the forefoot plantar intrinsic musculature was identified in patients with PHP.Therefore, the purpose of this study was to assess whether loading the plantar fascia strengthens the intrinsic foot musculature (IFM) and decreases PHP sufferers’ symptoms.Methods: A within-subjects experimental design assessed Foot Function Index (FFI) and IFM strength via hand-held dynamometry (HHD) in 12 patients with PHP prior to and at the end of a six-week toe-walking program.Results: After six weeks of treatment, the mean (SD) FFI score significantly decreased from 73.2 (32.4) to 43.3 (22.8) points (p = 0.010, ES = 1.1). HHD measures: Both great toe flexion and lesser toes flexion strength measures demonstrated significant force increase of 7.8N 95%CI [1.3, 14.4] (p = 0.024, ES = 1.0) and 6.6N 95%CI [1.8, 11.4] (p = 0.010, ES = 0.9), respectively.Conclusion: Results suggest toe-walking reduces PHP symptoms and increases IFM strength. There was no identified correlation between the IFM and FFI changes. Symptom reduction may potentially be due to a reduction in cortical inhibition rather than IFM strength changes. Findings provide foundation for future studies, employing imaging, to further validate the effectiveness of toe-walking in reducing symptoms of PHP patients.Trial registration: PROSPERO 2016 CRD42016036302 Registered 10 March 2016, https://www.crd.york.ac.uk/prospero/display_record.php?ID=CRD42016036302