Be sure to keep your head and spine neutral during the entire movement and your feet firmly planted with toes pointing forward. Stay firmly seated throughout the entire movement and make sure the seat is at an appropriate height.
Seated in proper position, adjust the seat height so that arms are parallel with the floor when grasping the handle(s).
How to do:
1. Plant yourself firmly on the seat facing the cable machine, and then grasp the handle(s).
2. Pull the bar closer towards your chest until you are either touching your chest, or as far as flexibility will allow.
3. Slowly let the weight return to its starting position in a controlled motion and repeat.