GOOD MORNINGS
How it's done?
Position barbell on back of your shoulders and take a grasp on the bar with your hands. The execution is quite simple, bend your hips to lower your upper body until your torso is parallel with the floor. You can bend your knees slightly while going down. Raise your torso up until your hips are extended. You have done one repetition. Keep your back straight at all times to help this you should look forward at the horizon during the execution.
This butt exercise is one of those exercises that don't suit to everyone and you should be very careful when starting to do this, because if you arch your back you put it under much stress which can result an injury.
What it targets
Good mornings target especially on the butt muscle, gluteus maximus. This is very good move to do to get your butt in shape.
Tips for shaping butt
While very effective move, you should really start carefully with this one and start with no weights and gradually going up. This move is very similar to much safer lower back extension bench exercise.