Use an overhand grip on the handles with your hands spaced shoulder width apart.
Pull the handles towards the middle of your chest by bringing your elbows towards your hips.
Slowly retreat to the start position and repeat.
Leaning back excessively to make the exercise easier.
Pulling the handles towards your face or hips instead of middle chest.
Using the momentum of the weights on the way back up.
Adjust the padding so that when you are seated it is pushing firmly on the top of your quads, approximately in the middle of the thigh. Grab the bar with an overhand grip and space your hands at roughly shoulder width apart. Holding the grips, lower yourself into the seat
Start by pulling the grips towards your middle chest region. Once the grips have been lowered to a point just before your chest, slowly extend your arms back to the start position. Your elbows should be going towards the back of your hips. Try to maintain a slight and steady lean backwards throughout the whole exercise. Repeat for the desired amount of repetitions then slowly raise yourself until the weight is caught.
The pull and retreat motion should be conducted in a controlled manner, a small amount of momentum is okay but ensure that you're not relying on this to perform the exercise.
Fitness for all, for life.