The Effectiveness of High Load Strength Training and Conventional Exercises in Patients with Chronic Plantar Fasciitis

Background: Chronic plantar fasciitis is one of the most common causes of heel pain, significantly impairing physical function and quality of life. While conservative treatment options exist, high-load strength training has been proposed as an effective alternative. Objective: This study aims to compare the effectiveness of high-load strength training versus conventional exercise programs in patients with chronic plantar fasciitis. Methods: A randomized controlled trial was conducted with 30 participants aged 18–60 years suffering from chronic plantar fasciitis. Participants were randomly assigned to either a high-load strength training group or a conventional exercise group using a closed envelope method. Interventions were delivered over six weeks. Outcome measures included the Foot and Ankle Ability Measure (FAAM) and the Numerical Pain Rating Scale (NPRS), assessed pre- and post-intervention. Statistical analysis was performed using paired and unpaired t-tests, with p-values <0.0001 considered statistically significant. Results: In the high-load strength training group, the mean FAAM score improved from 60.80 (SD: 3.57) to 81.93 (SD: 7.26), while NPRS decreased from 6.53 (SD: 0.52) to 3.27 (SD: 0.70). In the conventional group, FAAM improved from 59.80 (SD: 3.57) to 68.80 (SD: 2.48), and NPRS reduced from 6.47 (SD: 0.52) to 4.73 (SD: 0.46). Between-group comparisons revealed significant differences in both outcomes favoring high-load training (p<0.0001). Conclusion: High-load strength training resulted in greater improvements in function and pain reduction compared to conventional exercises in patients with chronic plantar fasciitis. This supports its integration into rehabilitation protocols.