Elderly people walking with weak legs may be calcium deficiency, potassium deficiency, or rheumatic diseases, lumbar spine diseases, cervical spinal cord lesions, and so on. It can be adjusted from diet, life, exercise and other aspects. At the same time, you should consult a doctor in time to clarify whether medication is needed. The elderly are prone to leg weakness if their daily calcium intake is insufficient, and it is recommended to eat some high-calcium foods, such as milk, soybean products, bone broth, etc. on a daily basis. If there is a lack of potassium in the body, resulting in hypokalemia, the patient will also have the symptom of weak legs, then you can go to the hospital and follow the doctor’s instruction to use potassium chloride preparation to supplement the potassium in the body. In addition, if the elderly have rheumatic diseases, lumbar spine diseases, cervical spinal cord lesions and so on, they may cause the symptoms of leg weakness in the elderly, and they need to seek medical treatment in time to treat the primary diseases. Usually pay attention to keep the body warm, do not get cold. Appropriate physical exercise, such as Tai Chi, aerobics and so on.