Thigh weakness after exercise can not lift up the local muscle relaxation, at the same time pay attention to stretching before and after exercise as well as exercise intensity adjustment. If there is weakness in the thighs after exercise, you can relax the local muscles and relieve the accumulation of lactic acid, then you can symptomatically relieve the symptoms. You can use a fascia gun to relax the local fascia and muscles, or you can relieve it through self-massage by applying repeated pressure to the leg muscles to relax them. In addition, in order to avoid the emergence of such a situation, you need to pay attention to the whole body before and after exercise to stretch the muscles, including the waist and back and legs, etc., can significantly prevent the emergence of such a situation. You also need to adjust the intensity of the exercise, choose the right exercise for yourself in order to achieve the purpose of scientific fitness.