Objective: The purpose of the study was to compare the effects of both techniques, assisted soft tissue mobilization (IASTM) and myofascial release technique (MFR), to improve pain and mobility among patients with chronic heel pain.

Methodology: It was a quasi-experimental study with a sample size of 70 with 5% margin of error and 95% confidence interval. Participants were recruited from outpatient department of physiotherapy of private hospital through convenient sampling technique. IASTM and MFR interventions were received by 33 participants in each allocated group.  Both groups were treated for three sessions per week for four weeks. Pre and post treatment readings were measured on NPRS and FADI.

Results: Both groups were similar at baseline on (age, weight, height, and BMI) and clinical characteristics NPRS, and FADI. To compare mean changes between groups, independent t-test was used. The mean difference of NPRS between groups in IASTM was 7.90 (1.01) to 1.60 (0.55) and in MFR group was 7.75 (1.0) to 2.87 (1.02) with p=0.001. The functional mobility on FADI was changed from 32.87 (14.21) to 95.81 (3.11) in IASTM and in MFR was changed from 32.33 (9.42) to 64.03 (9.23) with p=0.001.

Conclusion: The current study concluded that Instrument Assisted Soft Tissue Mobilization is more effective than Myofascial Release Technique in reducing pain and improving functional mobility of foot and ankle in chronic pain of heel.

Index Terms- Gastrocnemius muscle, Instrument Assisted, Mayo fascial release, Plantar fasciitis, Soft tissue technique,