In Sports Rehabilitation, how would you differentiate an OPEN Kinematic to a CLOSE Kinematic Chain of Exercises?

The kinetic chain refers to joints and/or body parts (hip, knee, ankle, foot).                              The definition says: in an open kinetic chain the body stays fixed while the limb is moven;           in a close kinetic chain the limb is stationary while the body moves.

If we are aiming a quadriceps strength (after ACL injury, for instance) we’ll put accent on open chain exercises.                                                                                                                    

But for patients with big pain joints, we’re going to recommend the close chain exercises (due to accent on use the muscles helping to create stability around the joints – decreasing the pain).

As was said earlier, closed chain movement normally implies the body is in contact with a fixed structure, e.g. feet with the ground or hands with a pull up bar. Open chain is when there is not contact with a fixed surface such as a dumbell or even a leg extension machine. However, your question with regards to rehabilitation would only be looking at joint range of motion as opposed to the force required to create these movements under load as you use the term kinematics and not kinetics.

In open chain there is free movement of trained part against nothenig .

iIn close chain there is movement against resissted surface .