The saying that “moderate fatty liver disease is the most afraid of exercise” is not correct, exercise will not aggravate the disease, and appropriate exercise also has a positive effect on the recovery of the disease, but it should not be excessive. There is no research showing that exercise will aggravate the severity of fatty liver disease, on the contrary, reasonable exercise can enhance metabolism, weight control, so as to slow down or even reverse the progress of fatty liver disease. Therefore, it is wrong to say that “moderate fatty liver is most afraid of exercise”. However, it should be noted that patients with moderate fatty liver disease must exercise moderately within their own tolerance to avoid damage to muscles, joints and cardiovascular system caused by excessive exercise. Specific exercise program should be developed under the guidance of the doctor, so as to avoid improper exercise, resulting in adverse consequences.