Our expert says:
I am having technical hiccups answering your query. I do apologse.
It is very unfortunate that your investigations have not given you a clearer picture of why your feet after a certain amount of running should go numb. The results of these tests should however eliminate certain causes, such as nerve entrapment. Were these tests done under symptom enducing conditions like after a 15-20 min run? This is important to measure the nerve conduction patterns after a certain dosage of activity.
A possible causes of your problem could include Compartment syndrome. Increased compartmental pressure of the working muscles of the lower leg may increase to a point where the blood and nerve supply to your feet become occluded resulting in numbness.
My recommendation would be to consult a sports physician regarding compartment syndrome . To confirm the diagnosis you would need to do a doppler test to measure the change in blood pressures before exercise and when you get your symptoms as well as measuring the amount of blood flow to your feet.
The information provided does not constitute a diagnosis of your condition. You should consult a medical practitioner or other appropriate health care professional for a physical exmanication, diagnosis and formal
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