Migraine Headaches: What Causes A Migraine? The cause of migraine is has not been proven. Some believe it is caused by certain food, others believe it is caused by the environment you are in. While the causes are unknown, certain things may trigger your migraine attack.
Your body relies on fat and carb to fuel your activities. When you start exercising, you body uses its store of carbohydrates because this supplies your body with energy quickly. As your activity lengthens the body switches over to burning fat.