Consider the causes of prolonged inactivity, calcium deficiency, restless leg syndrome, and so on. 1. Prolonged inactivity: If you don’t exercise for a long time, your muscles will be in a fixed position for a long time, and when you exercise, your muscles will spasm, and you will experience non-stop throbbing, accompanied by a slight pain. 2. Calcium deficiency: when calcium deficiency occurs, muscle excitability increases, muscle spasms occur, and the symptoms can be reduced after calcium supplementation. 3. Restless Legs Syndrome: discomfort in both lower limbs at night during sleep or in a quiet state, with muscle throbbing and rhythmic beating. Accompanied by a feeling of ants walking and numbness in the lower limbs. There may be Parkinson’s syndrome and cervical spondylosis and other diseases, when the muscles do not stop jumping if there is no improvement, you need to consult a doctor in time for further treatment.