Dizziness after fitness phenomenon, we must pay attention to exclude the most dangerous situation, if the most dangerous situation excluded, the slightest situation need to rest to improve the way: 1, the biggest risk is aortic coarctation, or carotid artery coarctation, may be accompanied by the occurrence of pain, common in the big physical labor, hard after pooping, or blood pressure suddenly rise in the situation, is the most critical clinical It is one of the most critical clinical situations, once it occurs, it may cause disability and death, the incidence is relatively low and the most critical, must be excluded at an early stage. 2, the most common situation is the factor of poor physical strength, the body is in the state of sub-health, you need to actively carry out the corresponding exercise, if you get better after resting, basically, it is this kind of factors.