Ankle dorsiflexion range of motion (ADF-ROM) deficits has been linked to impaired function, altered gait, and injury risk. This study’s objective was to examine the acute effects of static self-stretching (SSS), foam rolling (FR), and instrument-assisted soft tissue mobilization (IASTM) of the posterior lower-leg on ADF-ROM and functional ankle outcomes in individuals with ADF-ROM deficits. Thirteen healthy, physically active college students with active ADF-ROM ≤ 13°, assessed in a non-weight-bearing position, completed all three interventions in a randomized, within-subject repeated-measures design. Pre- and post-intervention assessments included ADF-ROM, ankle plantar flexor isometric strength (APF-IS), single-leg countermovement vertical jump (SLCVJ), anterior reach distance in the Y-Balance Test (A-YBT), and gait parameters (contact time and plantar pressure). A two-way repeated-measures ANOVA with Bonferroni post hoc tests was used. Effect sizes reported as partial eta squared (ηp2) and Cohen dz. All interventions significantly improved ADF-ROM (p 0.05, dz = 0.40) and between FR and SSS (p > 0.05, dz = 0.69) were nonsignificant, while IASTM was significantly greater than SSS (p < 0.05, dz = 0.92). Significant gains were also seen in A-YBT (p < 0.05; ηp2 = 0.302) and rearfoot plantar pressure (p < 0.01; ηp2 = 0.482), although pairwise comparisons were nonsignificant and demonstrated small-to-moderate effect sizes (dz = 0.35–0.52). No significant changes occurred in APF-IS, SLCVJ, or contact time and mid- and forefoot plantar pressures during roll-off. In conclusion, all interventions improved ADF-ROM, with IASTM and FR being comparably effective. However, only slight improvements in dynamic balance and certain gait parameters were noted, with no effect on strength or power.
Giannioti et al. (Wed,) studied this question.