Injury is a continuum, not a switch
Running injuries develop along a continuum from full health through low-grade symptoms to full time-loss injury, rather than as a binary healthy/injured switch.
In plain English
Injury is not simply on or off. Runners describe five to nine steps between feeling fine and hurting enough to stop. Most of the time, you live somewhere in the middle.
Why it works
Tissue stress accumulates and resolves continuously. Symptom thresholds for the runner's self-identification as 'injured' are arbitrary; underlying tissue state is graded.
What it means in practice
When tracking and discussing running symptoms, support more granular reporting than just 'injured/not injured.' Encourage runners to recognize early-warning states. In customer-facing copy, talk about 'how the body feels right now' rather than the injured/healthy binary.
The evidence
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Recreational runners describe injury along a 9-level continuum, from injury-free to career-ending injury. Each level is described across four categories of descriptors: physical description, outcome (effect on running and daily life), psychological description, and management. Lower levels of injury (early signaling, niggles, mild discomfort) are routinely trained through. Runners only self-classify as 'injured' when they need a healthcare-professional consultation or have to cease running. The Running Injury Continuum is proposed as a tool for both injury surveillance (researchers, healthcare professionals) and risk-factor research, and as a framework for educating runners about appropriate self-management of lower-level injuries.
n=31
Why we call confidence medium
Lacey 2023 qualitative study with 31 recreational runners identified a 9-level continuum from 'running smooth' through various symptom states to time-loss injury. The continuum framing is well-supported qualitatively but quantitative validation is ongoing.
Where it applies
Adult recreational runners.
Does not apply to: acute traumatic injuries (e.g., ankle sprain from a misstep) which are genuinely binary.
Plans that respect this
Plans that scored well on the rubric measures informed by this claim.
- 10-Week Run Your First 10k (3 days)
- 10-Week Run Your First 10k (4 days)
- 10-Week Run Your First Half Marathon (3 days)
- 10-Week Run Your First Half Marathon (4 days)
- 10-Week Sub-1:30 Half Marathon (4 days)
- 10-Week Sub-1:30 Half Marathon (5 days)
- 10-Week Sub-1:30 Half Marathon (6 days)
- 10-Week Sub-1:45 Half Marathon (4 days)
- 10-Week Sub-1:45 Half Marathon (5 days)
- 10-Week Sub-1:45 Half Marathon (6 days)
- 10-Week Sub-2 Half Marathon (3 days)
- 10-Week Sub-2 Half Marathon (4 days)
Last reviewed 2026-05-01. See how we score.