Plate support lumbar pain may be incorrect posture, may also be muscle strain, or lumbar muscle strain. 1. Incorrect posture: due to the incorrect posture when doing flat support may lead to greater pressure on the waist, lumbar pain, this phenomenon is more normal, can be under the guidance of professionals to improve posture, reduce the situation of lumbar pain. 2. Muscle strain: before the flat support, there is no stretching of the whole body, which will lead to sudden contraction of the muscles and the occurrence of strains, which can be relieved through massage and stretching. 3. Lumbar muscle strain: If you suffer from lumbar muscle strain, the nerves in the lumbar region are already compressed, and when you perform flatbed support, the lumbar region will bear more force, and the nerve compression will be more serious, so there will be lumbar pain. If you have back pain during flatbed support, it is recommended to improve posture, warm-up activities, abnormalities, timely medical treatment, and symptomatic intervention in accordance with medical advice.