7 doctors weighed in:

What can cause numbness in feet while working out?

7 doctors weighed in
4 doctors agree

In brief: Shoes

Check your workout shoes to make sure they are not worn out, and they provide adequate arch support for your foot type.
Athletic shoes have a life cycle of about 400-500 miles on average. Also make sure that if you have increased your activity or intensity of it, you have not done so too quickly. Make sure your shoes fit well. If the numbness persists, seek attention of a podiatrist.

In brief: Shoes

Check your workout shoes to make sure they are not worn out, and they provide adequate arch support for your foot type.
Athletic shoes have a life cycle of about 400-500 miles on average. Also make sure that if you have increased your activity or intensity of it, you have not done so too quickly. Make sure your shoes fit well. If the numbness persists, seek attention of a podiatrist.
Dr. Joseph Newman
Dr. Joseph Newman
Thank
Dr. Jeffrey Kass
Podiatry

In brief: Compression

Could be from back, ankle (tarsal tunnel) or neuromas.

In brief: Compression

Could be from back, ankle (tarsal tunnel) or neuromas.
Dr. Jeffrey Kass
Dr. Jeffrey Kass
Thank
1 comment
Dr. Robert Dunbar
Compression of the superficial peroneal nerve, as it leaves the fascia in the distal leg can also cause numbness on the top of the foot. Some people actually have a small bump, a hernia in the fascia, 8-10 cm above the ankle, on the outer front of their leg. The vascular engorgement that occurs during activity causes the nerve to get squeezed between the muscle and fascia, causing the numbness. If it doesn't improve shortly after stopping activity, seek medical attention.