There are many clinical reasons leading to the lack of energy and weakness of the patient’s calves, and the common considerations are hypocalcemia, hypokalemia, muscle strain, vertebral disease, soft tissue injury, bone fracture, etc., which are as follows: I. Hypocalcemia and hypokalemia: if the patient has hypocalcemia and hypokalemia, it will lead to the lack of energy and weakness of the calves. Muscle strain: the patient’s recent period of strenuous exercise, causing local muscle strain, the body creatine kinase secretion is too high, which will also lead to the calves have no energy, fatigue. Third, vertebral disease: if the patient has serious lumbar disc herniation, lumbar spondylolisthesis, lumbar spinal stenosis, intravertebral tumors, when compressed to the spinal cord nerve roots, it will also lead to the calves have no energy, weakness. Soft tissue injury, fracture, dislocation: the calf is subjected to external force, causing soft tissue injury, fracture, dislocation, later in the process of treatment, the need for strict local protection and braking, prolonged inactivity will lead to atrophy of the local muscles, which will lead to lack of energy and weakness in the calf.