Why does my arm go numb when I'm running?

[Anonymous]

My right arm goes numb when I'm out running and I don't understand why. I stretch pretty decently before I start. I'm also right-handed, if that makes a difference.

Has this happened to anyone else?

[Anonymous]

You use up a lot of magnesium when you exercise / run. Deficiency can lead to numbness since magnesium plays a role in nerve impulses. A high number of people are deficient in magnesium in general.

[Fireguy17]

Pinched nerve somewhere.

[Asker]

Thank you. How does that happen?

[Fireguy17]

Could be anything, slept wrong, twisted your neck, it usually starts in the C spine area.
Try either going to a chiropractor or get a deep tissue massage.
I had a couple of vertebrae that were twisted a bit and at any given moment my arm would fall asleep.
A chiropractor fixed me right up.

[Asker]

I remember this happening over 10 years ago too, so whatever happened, it dates back a while. I'll have it looked at.