What characterizes isokinetic movement?

Isokinetic movement is characterized by the speed of movement being kept constant throughout the entire range of motion. This means that the force exerted by the muscle varies but is always applied in a way that the velocity remains unchanged. Pushing and pulling simultaneously can often be an integral part of exercises designed to maximize efficiency and control throughout the isokinetic movement. This is seen in machines that allow athletes to exert force at a consistent speed, thereby engaging both the muscle being worked and its antagonistic counterpart.

The other options do not accurately describe isokinetic movement. Changing muscle groups does not apply as isokinetic exercises are typically focused on specific muscles while maintaining a consistent speed, rather than varying the muscle groups involved. Only pushing movements and static resistance also do not fit; isokinetic exercises are not limited to just pushing and require movement through a defined range of motion with resistance provided throughout.