The application of open-chain exercise in sports training, open-chain exercise can train a certain muscle of the body in isolation, so open-chain exercise is often used to train a certain muscle in sports; The range of motion of the distal end is larger than that of the proximal end, and the speed is faster than that of the proximal end, so open-chain exercises are often used to train muscle explosive force in training.
When exercising the function of injury rehabilitation, because the shear force produced by the open chain movement is greater than that produced by the closed chain movement, the open chain movement should not be chosen to restore the function, so as not to increase the burden on the seriously injured part. In the later stage of rehabilitation, when the joint's functionality and proprioception have been strengthened to a certain extent through closed-chain exercise, open-chain exercise can be used to train the muscle groups near the joint sexually.
For example, rehabilitation exercise after anterior cruciate ligament (ACL) reconstruction of knee joint. In the early stage of rehabilitation, static semi-squat (standing pile) can be used as a closed chain movement. During static squat, the quadriceps femoris and hamstring muscles contract synchronously, reducing the torque and the load on the ligament, and effectively maintaining the stability of the knee joint. When the function and proprioception of knee joint are enhanced to a certain extent through closed-chain exercise, open-chain exercises such as sitting knee joint resistance and knee flexion can be adopted in the later stage of rehabilitation. Strengthen the muscle strength of quadriceps femoris and hamstring muscles and protect the knee joint.
The role of closed-chain movement in sports training, closed-chain movement involves more muscles and joints, which needs the coordinated activities of multiple joints to complete, and is closer to the real movement. It is the first choice for professional athletes.
In the exercise of injury rehabilitation function, closed-chain movement is a multi-joint coordinated movement without increasing joint shear force, which can stimulate joint proprioceptors, produce limb movements and protective reflex arc activities, fully train the overall coordination of joints, promote the functional recovery of joint proprioceptors, and thus promote joint stability and functional recovery. Therefore, the closed-chain motion recovery function should be selected in the early stage of rehabilitation.
For example, rehabilitation exercise after anterior cruciate ligament (ACL) reconstruction of knee joint. In the early stage of rehabilitation, static semi-squat (standing pile) can be used as a closed chain movement. During static squat, the quadriceps femoris and hamstring muscles contract synchronously, reducing the torque and the load on the ligament, and effectively maintaining the stability of the knee joint. When the function and proprioception of knee joint are enhanced to a certain extent through closed-chain exercise, open-chain exercises such as sitting knee joint resistance and knee flexion can be adopted in the later stage of rehabilitation. Strengthen the muscle strength of quadriceps femoris and hamstring muscles and protect the knee joint.