What this means in real training
Why the claim sounds convincing
Widely repeated running-form rule with speed, height, experience, and injury-context problems.
The mistake is turning a possible mechanism, average association, or useful option into a universal rule.
What the evidence supports
No universal cadence fits every runner. Cadence changes with speed, height, mechanics, terrain, and experience. The relevant evidence needs to match the exact population, intervention, comparison, and real-world outcome instead of borrowing certainty from a mechanism, acute response, or marketing label.
How does cadence vary naturally, and when do modest changes affect loading, symptoms, or performance?
Mechanisms, short-term measurements, and anecdotes can explain interest, but they do not automatically establish long-term benefit or safety.
The useful verdict depends on dose, training status, baseline habits, adherence, and whether the measured outcome matches the promise.
How to use the answer
Do not force 180; consider small cadence changes only when they solve a specific loading, symptom, or performance issue.
Study populations, protocols, outcome definitions, and follow-up periods vary.
Averages do not guarantee the same response for an individual reader.
Pain, illness, pregnancy, medication use, or medical exercise restrictions can change the practical decision.