i you're looking or a solution so you don't have to eat, and can still exercise, you won't find one. Your body feuls off of the energy it needs, which comes from food, otherwise you are eating away at muscle tissue if you have nothing left to burn. When you start to do that, your body is able to build and repair what is needed for your body, also this can mean eating away at organs like your heart. There's no healthy way to give your body the energy it needs to get through a workout.i know this i've been there a million times. I've gotten really dizzy, fatigue, sore, pulled muscles and so much more from over training. You need to make sure u r drinking adequate anounts of water and i used to fear vitamins but they might be important if you are missing essential nutrients. B vitamins are especially energy enhancing, but don't hink you can just take those and not eat, you won't get fat from vitamins.

Sounds like you blood sugar is low. I know you dont want to hear it, but you need to eat something before exercising and drink lots of gatorade. It has electrolytes that will help keep you hydrated.

I know what you are talking about. I would suggest drinking propel or powerade options because I know we cannot get you to do what you need to do. I am just the same way. I am not a doctor but I take vitamins and drink enough water even when I'm not being "healthy" I get dizzy at the gym, make sure you take in some form of pottasium. I wish you the best, I hope you feel better.

every time i feel dizziness and realize that i am going to pass out i drink hot black tea witha slice of lemon and sugar. but it has to be really stong and sweet. it cant be used if having any heart deseases or high blood pressure. my doctor says that this is because of my low blood pressure, anemia, etc. but there are a lot of reasons for dizziness (problems with blood circulation in vessels in your head-sorry, English is not my native language, it is hard to express medical terms:). If it really bothers you go to the doctor, dont get scared, it shouldn be anything serious.
my friend felt dizziness all the time when she was using birth control pills. she couldnt wake up in the morning, always kept sugar bags and strong tea in thermos next to her bed. as soon as she stoped taking those pills all the sympthoms were gone.
anyway, go to the doctor and check it out, even if it is just problems with sugar level in your blood it's always better to make sure you are all right.
Feel better!