STARTING POSITION:
Find a wall to do the exercise and put a fitball between you and the wall. Support your weight on your toes and place your hands on the fitball. Your hands should be in front of your shoulders. Keep the shoulders far from the ears retracting your shoulder blades. Contract your pelvic floor and core while keep your body straight.
MOVEMENT:
Start lowering yourself by bending your elbows until your chest almost touches the fitball while you inhale. Press your upper body back to the starting position strengthening you body while you exhale. Make sure your shoulder blades are always retracted.
TIPS: The exercise key is quality over quantity. The trick is to perform the exercise using proper form.