Not medical advice
Running involves risk. Runner World content is general educational information, not medical advice, diagnosis, treatment or an individualized exercise prescription. A citation does not establish that a recommendation is appropriate for you.
Consult a qualified healthcare professional before beginning or materially changing an exercise program when you have symptoms, injuries, recent surgery, pregnancy, chronic illness, medication concerns or another reason vigorous activity may require individualized review. Seek urgent care for emergency symptoms.
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