Lumbar muscle strain primarily arises from repetitive stretching of the back muscles due to work-related activities or intense physical exercise. This leads to a range of symptoms, such as stiffness in the lower back upon waking in the morning, reluctance to move, and symptomatic relief after some activity. It is advised to gently exercise the lower back to effectively alleviate symptoms, avoid strenuous exercise or prolonged bending and heavy physical labor. It's best to strictly rest on a firm mattress, perform warm-up activities for the lower back, and undergo appropriate physical therapy and massage. Consuming blood-activating and pain-relieving medications can also help. Typically, symptoms will gradually ease over 7-10 days. Although light activity for lumbar muscle strain is acceptable, engaging in exercise is not recommended. Rest is necessary, and a general rest period of about half a month will gradually reduce symptoms. Recurrences are common, so it is important to regularly care for your lower back by avoiding activities such as bending to lift heavy objects, carrying heavy loads, etc., as these can easily lead to repetitive strain injuries of the back muscles.