2.plank is a muscle training method similar to push-ups. Exercise is mainly in prone position, which can effectively exercise transverse abdominal muscles and is recognized as an effective method to train core muscles.
3, prone, elbows bent and supported on the ground, shoulders perpendicular to the ground, feet on the ground, body off the ground, trunk straight, head, shoulders, hips, ankles kept in the same plane, abdominal muscles tightened, pelvic floor muscles tightened, spine lengthened, eyes on the ground, keep breathing evenly.