Dizziness after fitness, mostly due to the following reasons: 1, after fitness due to too much exercise, the body sweats a lot of effective circulating blood volume is reduced, resulting in the blood supply to the brain is also reduced, there is a lack of blood supply to the brain and dizziness symptoms. 2, after fitness due to the large amount of activity, sympathetic nerve excitement, vascular contraction, blood pressure increases, there will also be a dizziness of the performance of the performance of the 3, fitness exercise for too long there will be a vascular contraction, especially the contraction of cerebral blood vessels, resulting in a decrease in blood supply to the brain, which can also lead to dizziness. This type of dizziness does not need to give special drugs to deal with, appropriate rest, drink more salt water, the symptoms can gradually disappear.