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DOMS or injury? How to tell the difference

Understand the usual pattern of post-exercise muscle soreness, signs that may point to an injury, and when to seek an assessment.

Runner pausing with soreness in the front of the thigh

What DOMS usually feels like

Delayed onset muscle soreness (DOMS) can start after a new activity. A harder session than usual can also cause it. The muscles tend to feel stiff or sore across a wide area.

DOMS often starts several hours after exercise. It rarely begins during the movement itself. The soreness may feel strongest one to three days later. It should then ease as the muscle recovers.

Signs that are less typical of DOMS

An injury is more likely to need assessment if you notice:

  • Pain starts suddenly or feels sharp during the activity.
  • Pain stays in one small area instead of spreading across a muscle group.
  • There is clear swelling, bruising or loss of movement.
  • A joint feels unstable or gives way.
  • You lose strength or cannot use the limb as normal.
  • Symptoms keep getting worse instead of easing.

None of these signs identifies a specific injury on its own. They are reasons to reduce the load and seek advice.

What to do next

With normal soreness, gentle movement may help if it feels comfortable. Sleep, fluids and a short reduction in training may also help. Do not force a stretch. Avoid the activity at full intensity while movement is limited.

If you are not sure whether pain is normal soreness, book an assessment. This can help identify what happened and plan a sensible return to activity.

When to seek urgent help

Get urgent medical care after a serious injury if you cannot put weight on the limb. An obvious change in shape also needs urgent care. Seek help for severe swelling, new numbness or weakness. Chest pain, trouble breathing, dark urine or severe pain across many muscles also need prompt care.

Where massage fits

Research suggests massage may slightly reduce soreness after exercise. It may also improve flexibility for a short time. The research has not shown a direct gain in strength, speed or endurance. Massage should not delay an assessment when signs suggest an injury.

Sources

This information is general and cannot diagnose an individual problem. Seek appropriate medical care if symptoms are severe, worsening or accompanied by a warning sign.

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