Yoga instructors who have been teaching for more years must have seen such a student: he/she comes to your class for the first time and knows nothing about yoga postures, but he/she can follow the instructor effortlessly to complete some difficult postures, such as camel pose, lotus sitting, horizontal and vertical forks, and even he/she can do some movements that are amazing to the ordinary people. After the class, you can’t help but ask him/her: Have you really never practiced yoga before? He (she) told you since childhood is like this, did not practice ~ ~ really envious of others! In a way, this inherent enviable flexibility is really a gift and a good seedling to be a coach. In fact, some yoga instructors have become instructors after practicing for a few years because they can do the asanas “effortlessly”. But from the sports medicine point of view, some of these people may be suffering from a condition called “generalized ligament laxity”! Systemic ligament laxity, also called benign joint hypermobility, is mainly manifested by the fact that the mobility of all joints in the body is beyond the normal range. Of course, with hard training over a long period of time, ordinary people can also have exceptional flexibility, and improperly treated ligament strains in the joints can lead to increased mobility or abnormal activity. However, in this condition, the structural development of the ligaments is abnormal and the protective effect of all the ligaments around the joints throughout the body is reduced, resulting in a significant increase in joint mobility. Diagnosis of systemic ligamentous laxity: The most commonly used international diagnostic criteria is the Beighton Classification Score, which assesses mobility in nine areas of the body: bilateral elbow extension, bilateral wrist flexion, bilateral knee extension, bilateral pinky extension, and body flexion mobility (including spine and hip flexion). A score of 1 point for each area of hypermobility was assigned, with a total of 9 points. A score of more than 4 points was used to diagnose the condition. The angle between the little finger and the back of the hand exceeds 90°, the thumb can touch the anterior elbow joint hyperextends more than 10°, the knee joint hyperextends more than 10°, and the palm of the hand can press against the ground in body pronation. However, people diagnosed with generalized ligamentous laxity do not have to worry too much. Generally, if it is not combined with obvious deformities and disorders of the locomotor system, it does not cause significant direct damage to the body and does not require special treatment. However, this disease still has some potential hazards: because of the loose ligaments, when exerting force, the joints tend to exceed the normal angle, and the muscles and ligaments are easily injured; according to the results of current research, patients with generalized ligamentous laxity are more likely to have back pain, fallen pillow or joint pain than normal people, and are prone to osteoarthritis in old age; some people’s pelvic cavity or abdominal muscles will p less support, resulting in visceral prolapse. In a very small number of patients, mitral valve prolapse may be combined with cardiac prolapse; in children, the manifestations may be slightly slower motor development, less dexterous hands, poor coordination and balance, flat feet, etc. Some of the more obvious ones may lead to knee instability and habitual dislocation of the patella. For these people, it is not necessary to go p less joint activity angle, but to strengthen muscle strength and endurance to compensate for the stability of part of the joint during the activity. When practicing yoga and Pilates, we should pay more attention to the stability of the core and the stability of the shoulder girdle and pelvic girdle to avoid hyperextension of the joints; children can use thicker pens or pencil grippers to improve the posture of holding pens and prevent deformation of the finger joints; if you have flat feet, you can use shoe insoles and orthopedic pads. Children with flat feet can use shoe inserts and orthopedic pads to prevent deformation of the finger joints. They should also pay attention to proper standing, sitting and walking postures. If there are other congenital anomalies, such as habitual dislocation of the patella, surgery is required.