Research brief · 2026-09-09
How Long Does Soft Tissue Actually Take to Heal?
Symptoms fade well before the biology finishes. That is the short version of the healing-timeline literature, and it holds across tendon, ligament and muscle, though the actual clocks are very different.
The reference framework is a 1993 review in Dermatologic Clinics that describes three overlapping phases. The inflammatory phase runs over the first days, with clotting and immune cells arriving. The proliferative phase follows over one to a few weeks, as new tissue and blood vessels form. The remodeling phase, where collagen is laid down and reorganized, takes place over months. A 2006 review in the Journal of Musculoskeletal and Neuronal Interactions applies the same structure to tendon, with one key addition: the biochemical and mechanical properties of healed tendon never fully match uninjured tendon, even after remodeling.
Ligament is the slowest tissue in this literature. A 2020 study in Orthopaedic Surgery examined 34 human biopsies of ACL reconstruction grafts taken at different times after surgery. In the earliest group, cell counts were roughly two and a half times those of native ligament. They fell over time but remained about double native tissue even in the group more than nine years out. The authors called it adaptation rather than full restoration.
Severity and rehabilitation both move the clock. A 2023 pilot study in Foot and Ankle Orthopaedics found a straightforward ankle sprain returned professional soccer players in a mean of 26 days, while a high ankle sprain took 91. A 2025 prospective cohort in Science Progress found a mean of 172 days to return to sport after ankle ligament surgery, and only about half had returned at follow-up.
The limit is that no unified soft-tissue timeline exists, and the tendon literature does not pin down when normal strength returns. For any real injury, the timeline belongs with a physician or physiotherapist who can see the tissue in question.
Sources
- The wound healing process
- Dermatologic Clinics 1993
- Biology of tendon injury: healing, modeling and remodeling
- Journal of Musculoskeletal & Neuronal Interactions 2006
- Histomorphological Alterations of Human Anterior Cruciate Ligament Grafts During Mid-Term and Long-Term Remodeling
- Orthopaedic Surgery 2020
- High-Speed Video Analysis of Syndesmosis Injuries in Soccer: A Pilot Study
- Foot & Ankle Orthopaedics 2023
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