Which of the following is an example of a closed kinetic chain exercise?

A closed kinetic chain exercise is one where the distal segment of the limb is fixed, meaning it does not move freely in space. This type of exercise typically involves multiple joints and muscle groups working together, contributing to increased stability and functional strength.

Squats are a prime example of a closed kinetic chain exercise because, in a squat, your feet are planted on the ground, which allows the knees and hips to flex and extend while the feet remain stationary. This action engages multiple muscle groups, including the quadriceps, hamstrings, glutes, and core, promoting stability and coordination throughout the movement.

In contrast, exercises like the leg press, shooting a basketball, and bicep curls do not share this same characteristic. The leg press, while it does involve movement in a fixed position, does not have the same multi-joint cooperation seen in squats. Shooting a basketball involves significant movement of the arms and body, with feet not being planted in a fixed position. Bicep curls isolate the elbow joint and require the hand to move freely through space, thus they are classified as open kinetic chain exercises.