Which action is an example of a closed kinetic chain (CKC) exercise?

Which action is an example of a closed kinetic chain (CKC) exercise?

• A. Ankle dorsiflexion with the foot moving freely.
• B. Squat with feet fixed and body lowered toward the floor.
• C. Seated knee extension with ankle moving.
• D. Leg curl with foot moving.

Answer: (B)

This question tests understanding of closed versus open kinetic chain movements. In a closed kinetic chain exercise the end segment (the feet) is fixed to a surface, so movement involves multiple joints as the body moves as a unit. A squat with the feet planted and fixed to the floor fits this: the hips, knees, and ankles all move together while the distal end remains anchored, creating a coordinated, multi-joint pattern. The other examples involve the end segment moving freely—like the foot or ankle moving independently—typical of open kinetic chain movements. Therefore, the squat with fixed feet is the example of a closed kinetic chain exercise.

This question tests understanding of closed versus open kinetic chain movements. In a closed kinetic chain exercise the end segment (the feet) is fixed to a surface, so movement involves multiple joints as the body moves as a unit. A squat with the feet planted and fixed to the floor fits this: the hips, knees, and ankles all move together while the distal end remains anchored, creating a coordinated, multi-joint pattern. The other examples involve the end segment moving freely—like the foot or ankle moving independently—typical of open kinetic chain movements. Therefore, the squat with fixed feet is the example of a closed kinetic chain exercise.