What is the focus of closed kinetic chain exercises?

Closed kinetic chain exercises are designed to engage multiple joints and muscle groups simultaneously while the distal segment, such as a foot or hand, is fixed in space. This means that during these exercises, the body moves in a way that connects the movement through multiple joints. For example, in exercises like squats or lunges, as one joint (the knee) moves, other joints (the hip and ankle) are also involved in the activity due to the fixed position of the feet.

This alignment and multi-joint action help in functional strength development and improve joint stability, making these exercises particularly effective in rehabilitation and enhancing overall physical performance. They mimic real-life movements more closely than isolated exercises, therefore promoting better functional outcomes.

The other choices do not reflect the primary focus of closed kinetic chain exercises. Isolating individual muscles limits the exercise's effectiveness in engaging multiple joints, and while closed kinetic chain exercises may indirectly help with cardiovascular endurance and flexibility, these are not their primary objectives.