Why did I get light headed after I work out?

I had a good breakfast and I waited for about an hour before I started... I walked on the tread mill for about 30 minutes at about 4 miles an hour and then I did a 5 minute cool down... After I got off the tread mill I felt alittle light headed...

Maybe your breakfast wasn't 'good' enough? I always feel light-headed after a gym session if my food intake is too low. Consume more protein - that should help.

I agree with the above post, but in addition, make sure you are staying well hydrated.

Were you hyperventilating maybe? Four miles an hour is a brisk pace and it's fairly easy to overbreathe.

Original Post by jill91198:

I agree with the above post, but in addition, make sure you are staying well hydrated.

You might be right about the hydration... I did not drink any water while I was working out... Thanks