Comparing the Immediate and Sustained Effects of Instrument-Assisted Soft Tissue Mobilization on Ankle Dorsiflexion Original Research

Abstract

Introduction: Ankle dorsiflexion plays a crucial role in maintaining proper biomechanics and preventing overuse injuries. This study aimed to evaluate the efficacy of Instrument-Assisted Soft Tissue Mobilization (IASTM) compared to static stretching in improving ankle dorsiflexion range of motion (ROM) during weight-bearing activities, and to assess whether these effects persist over time.  

Methods: A total of 30 participants reporting restricted dorsiflexion were divided into two groups: 14 participants underwent IASTM treatment, and 16 performed static stretching exercises. Dorsiflexion was assessed using the half kneeling ankle dorsiflexion range of motion test at six-time intervals, including pre-intervention and post-intervention at 15-minute intervals up to 60 minutes. The IASTM group received a 5-minute treatment targeting the triceps surae using the HG8 instrument, while the stretching group completed static stretches on a 45-degree slant board.

Results: Statistical analysis using repeated measures ANOVA revealed no significant differences between the two intervention groups in terms of dorsiflexion improvement over time. However, significant improvements were noted within the stretching group when comparing pre- and post-intervention measurements, though no lasting effects were observed at subsequent time intervals. The control leg showed no significant changes for either group.

Conclusions: In conclusion, while both static stretching and IASTM provide marginal improvements in ankle dorsiflexion, neither intervention demonstrated statistically significant superiority. Further research with more comprehensive protocols is needed to determine long-term efficacy in clinical populations.