Pain while running

Some discomfort is normal when running; pain that is sharp, in one spot or changes how you run is not.

• Usually normal: burning muscles in hard efforts, heavy legs, soreness on both sides peaking 1 to 2 days after a session and fading within 3 to 4 days.
• Stop if pain is sharp, in one precise spot, makes you limp, worsens as you run, or is in a joint or bone.
• Rule of thumb: up to 3 out of 10, gone by the next morning, is fine; above that, cut back or stop.
• See a physiotherapist or doctor if pain lasts beyond 1 to 2 weeks, keeps worsening, swells, or is there at rest or at night.

Chest pain, dizziness or fainting: stop at once and get medical help.