Lack of energy in the recovery period after cerebral infarction is related to bed-ridden, malnutrition, hemiplegia and so on. 1. Bed-ridden: If patients with cerebral infarction are bed-ridden for a long period of time, it may lead to weakness, muscle atrophy, lack of energy and other symptoms. 2. Malnutrition: Patients with cerebral infarction eat poorly, resulting in malnutrition, which may lead to symptoms of weakness. If the patient has electrolyte disorder, such as hypokalemia, it may also lead to weakness. 3. Hemiplegia: After the recovery period of cerebral infarction, there is still limb movement dysfunction, and the symptom of lack of energy will appear. During the recovery period of cerebral infarction, active motor function rehabilitation training should be carried out under the guidance of rehabilitation doctors to improve the function of limbs, and medicines should be taken regularly to prevent the recurrence of cerebral infarction.