Open chain motion and closed chain motion differences and contact

Learn the concept, characteristics and specific applications of open chain movements and closed chain movements, let me talk about our study.

What is a sports chain?

Open chain sports referred to as open chain movement, closed chain sports referred to as a closed chain movement, the relevant statement originates from modern sports (but originally made by a mechanical engineer) and is two concepts that sounds abstract. To understand the true meaning of open chain movement and closed chain movement, you first know what is a sports chain.

The English language called Kinematic Chain is KINEMATIC Chain. It is "sports chain", but the original intention of this concept is: complex motion system composed of a series of joint devices and power devices, each joint in this sports system can mutual Compatible with specific tasks (such as crane lifting heavy objects), and the various joints involved in the task process are usually associated with one overall.

This concept is also applicable after being attracted by the human body. For example, when we want to move the weight, we need a bone, muscle, ligament synergistic work of each joint such as leg, hip, waist, back, arm, neck, and all joints in the appropriate time, with the appropriate angle output. Power, ultimately can complete the seemingly simple moving task.

The so-called sports chain means that in order to complete a collection of sports organizations that work together with each other.

Open chain motion and closed chain movement:

The English name of the open sports chain is Open Kinematic Chain (OKC), which involves the opening of the open motion chain, which is open-chain motion. For the Chinese explanation of open chain motion, most of the intensity of "near the near-end fixed and far-end activity" "; The English name of the closed motion chain is Close Kinematic CHAIN ​​(CKC), which involves the movement of the closed motion chain is a closed chain movement, and the Chinese explains mostly" movement of the far end of the limb and the movement of the proximal activity ".

To understand this definition, you must first figure out the concept of "distal" and "proximal". The proximal end refers to the body body. This is better understood; the distal end refers to the body part of the body body during exercise, for example, in the boxing movement, the fist is the distal end, in the riding movement, the foot is also distal.

The so-called open chain movement means that the actor is not moved, and the movement of the shift point occurs, and the result is the position and state of the third party object (eg, excavator soil, the position of the excavator body is constant, occurring Changed the position of the shovel and soil); the definition of the closed chain movement should be: do the position of the work main body change, but some parts or the position of the limbs are fixed (for example, the bibaria is up; for example, the excavation machine for shovel support The ground is over the big pit), and the result is often the position and state of the main body itself.

The difference between open chain motion and closed chain movement:

1. The motor area is different. The main position of the open chain movement is not moved, only the portion of the end of the endless power point produces a movement; the main body of the closed chain movement is in motion, but the part at the power point may be fixed.

2. Different from the position. Open chain motion-mobilized sports organizations, only local joints and muscles involve; the closing chain motion mobilized sports tissue, the body is directly or indirectly related to sports organizations to participate.

3, different complexity. Open chain motion is simple, direct, closed chain motion, complex, coherent.

4, the exercise effect is different. Open chain motion is directly for local joint and muscle exercise effects, often used in the strengthening of local sports tissues; closed chain motion has higher requirements for overall muscle strength, action coordination, etc., mostly used in technical actions and rehabilitation train.

for example:

1, sitting a posture to stretch the leg. As shown below, when sitting a stunning leg exercise, the body body does not move, only the legs and the legs and feet in the rear end of the force point change, only the knee joint and the upper femoral muscle in the whole exercise are in the process. Force, the action is relatively simple, and the joints and muscles of the body will not mobilize the body, which is obviously a typical "open chain movement".

2, sitting positioning legs. As shown below, when sitting posture leg exercise, although there are many parts of the body that are moving, the position of the main body remains attending, which is obviously a "open chain movement".

3, pull down before before. As shown below, it is still the body body. Only the arm and the surrounding movement are an open chain movement.

4, the bibaria up. The body moves overall, but the origin is not moving, belongs to the closed chain movement.

Tip: The content of this article is for reference only, please refer to the consultation results of regular hospitals!