The purpose of this study was to investigate static plantar pressure distribution in individuals with ACL reconstruction and pronated foot at different time intervals following surgery. Thirty male participants with pronated foot and ACL reconstruction (mean age: 25.45 ± 1.27 years; mean weight: 79.10 ± 1.75 kg; mean height: 178.85 ± 3.68 cm) and ten healthy male controls (mean age: 24.10 ± 1.54 years; mean weight: 80.48 ± 1.29 kg; mean height: 177.10 ± 5.42 cm) voluntarily participated in this study. Plantar pressures were measured using a Footscan pressure plate system (manufactured in Belgium). Statistical analysis was performed using a two-way repeated-measures analysis of variance (ANOVA). Results demonstrated that the factor of time (pre- versus post-fatigue) had a significant effect on increasing plantar pressures across all groups (P < 0.001).
Additionally, the group factor revealed significant differences among groups; specifically, Group A (less than 6 months post-reconstruction) exhibited the highest pressure values in the medial heel, midfoot, and metatarsal regions. The time × group interaction effect was statistically significant for mean plantar pressure, medial heel pressure, first metatarsal (M1) pressure, and pressure under toes 2–5 (T2–T5) (P < 0.05). Post-hoc tests indicated that the greatest post-fatigue pressure increases occurred in Groups A and B. It appears that individuals with ACL reconstruction and a pronated foot, particularly during early rehabilitation stages (less than 12 months post-surgery), experience a substantial increase in plantar pressures under fatigue conditions, indicating greater instability and abnormal load distribution across the foot.