**5. Conclusions**

This study found that patients with a history of a TAF show reduced ROM in the affected ankle segment during the loading response and the pre-swing phase compared to their non-affected side and control subject. The affected sides' Chopart joint showed increased ROM during midstance to compensate for reduced ankle segment ROM during loading responses. Finally, small joint coupling was observed in the affected side as well as the non-affected side compared to the control group. Despite the limited effect size of our results, the findings of this study emphasize the importance of adequate postoperative rehabilitation to restore mobility and thereby potentially lower the risk of post-traumatic osteoarthritis in patients with a history of TAFs.

**Author Contributions:** H.H., O.V. and F.S. participated in the design and drafting of the manuscript; L.B. and J.C. collected the data and designed the manuscript; G.M. and S.W. helped to coordinate and draft the manuscript; E.V. participated in the sequence alignment; and K.D. conceived of the study, participated in its design and coordination, and helped to draft the manuscript. All authors have read and agreed to the published version of the manuscript.

**Funding:** This study was funded by the Belgian Society of Orthopedics and Traumatology (BVOT) with a EUR 4400 grant.

**Institutional Review Board Statement:** This study was completed in compliance with national legislation and the guidelines of the ethics committee of the University Hospitals Leuven (S62064). The study was conducted in accordance with the Declaration of Helsinki and approved by the Institutional Ethics Committee.

**Informed Consent Statement:** Informed consent was obtained from all subjects involved in the study.

**Data Availability Statement:** Not applicable.

**Conflicts of Interest:** The authors declare that they have no conflict of interest.
