Everyone is all in a tizzy, DON'T ASK ABOUT MEDICAL THINGS ON THE INTERNET. Truth is, for me, the last 4 times I've needed to go to a doctor (3 years time or so) I've researched the problem beforehand and received the diagnosis I expected from the Dr. For me, again, this was back spasms, knee pain, infected mucus gland on my hard pallate, and something I'm forgetting; a wide range of topics.

My vote is to go ahead and look it up. Have your friend read the possibilities at http://www.google.com/search?q=exerc...ient=firefox-a then push him, because dizziness is so vague, and some of the problems are serious, to get a checkup.