A new documentary, The Ultra Runner, follows Romanian ultramarathoner Tibi Ușeriu. It premieres at TIFF on Sept. 11. The film captures Ușeriu's transformation through running.

Ușeriu's life includes a troubled childhood, escape from Romania, and prison. Running became his path to healing. The film highlights his internal struggles and endurance. Read more trail coverage.

Directed by Mila Aung-Thwin, the documentary uses the Arctic as a backdrop. It reflects Ușeriu's past and his journey. The film is not just about sport, but survival and willpower. Related: Insights from a Week at UTMB: Beauty, Progress, and Challenges.

This original Runner World brief is based on reporting from Canadian Running. Visit the source for its complete reporting, context and any later corrections.