STRIDELY Academy
Achilles Pain

Achilles Pain When Running: Causes and Fixes

Why your Achilles hurts when you run, what it usually means, and how to get back to training safely.

What this pattern usually means

Pain that turns on with running and turns off when you stop usually points to a load or mechanics issue. The tissue is irritated but rarely structurally damaged — yet.

What to do today

  • Cut volume by 30-50% for 7-10 days
  • Drop intensity (no speedwork, no hills)
  • Add daily mobility for the affected area
  • Replace one run per week with cross-training

When to worry

  • • Pain doesn't fade after the first mile
  • • Pain worsens as the run goes on
  • • Pain lingers into the next day's easy run

Common causes of Achilles pain

  • Achilles tendonitis
  • Insertional tendinopathy
  • Speedwork or hill spikes
  • Drop change in shoes

Could it be one of these injuries?

Achilles Tendinopathy

Achilles tendinopathy is degeneration and disorganization of the Achilles tendon fibers from chronic overload. It's not a classic 'inflammation' injury — the modern model is that the tendon adapts poorly to load, thickens, and becomes painful. Two main types: insertional (at the heel) and mid-portion (2-6 cm above the heel).

Other Achilles pain patterns

Achilles pain after running
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Achilles pain on impact
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Achilles pain going downhill
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Achilles pain at rest
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Achilles pain in the morning
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