Dizziness and vomiting after sudden exercise after too long a period of inactivity may be caused by normal physiological phenomena, or it may be caused by insufficient cerebral blood supply, or it may be caused by electrolyte disorders or heart diseases. 1. Normal physiological phenomenon: lack of exercise for a long time leads to a decline in cardiopulmonary function, sudden exercise will lead to an increase in the body’s need for blood and oxygen, the decline in cardiopulmonary function is not enough to supply the body’s needs, which will lead to transient cerebral blood supply, dizziness, nausea symptoms. 2. Insufficient cerebral blood supply: Insufficient cerebral blood supply occurs in patients with atherosclerosis, carotid artery stenosis and other diseases, for such patients, sudden exercise will lead to a large amount of blood distribution to the muscle tissues of the patient, which will aggravate the insufficient cerebral blood supply, and dizziness and nausea symptoms will occur. 3. Electrolyte disorders: Because the body sweats a lot during exercise, it can lead to electrolyte disorders in the body, making the patient experience dizziness and nausea. 4. Heart disease: for patients suffering from heart failure, arrhythmia, sudden exercise will lead to an increase in the preload of the heart, the heart pumping blood relative to the body’s needs is more insufficient, so the cerebral blood supply will be aggravated, and then the symptoms of dizziness, nausea. In addition to the above factors, other reasons can also lead to patients who have not exercised for too long, sudden exercise after dizziness, vomiting symptoms, it is recommended to consult a doctor in a timely manner to identify the causes and ask the doctor to deal with it.