Open Kinetic Chain Exercise
Exercise where the distal segment of the limb moves freely without resistance from ground contact.
Full Definition
A type of exercise where the terminal joint of an extremity is not fixed or in contact with an immovable surface, allowing free movement through space. Examples include leg extensions, bicep curls, and shoulder flexion exercises. These exercises typically isolate specific muscle groups and allow for precise control of resistance and range of motion. Open kinetic chain exercises are particularly useful in early rehabilitation phases when joint protection is important, or when targeting specific muscle weaknesses. They contrast with closed kinetic chain exercises where the distal segment is fixed, creating a different pattern of muscle activation and joint stress.
Usage
Usage note: Often abbreviated as OKC in clinical documentation. Contrasts with closed kinetic chain (CKC) exercises.
In Context
- "Open kinetic chain exercises were initiated to strengthen the quadriceps while protecting the healing ACL graft." — Post-surgical rehabilitation plan
- "The patient performed seated knee extension exercises as part of their open kinetic chain strengthening program." — Physical therapy treatment note