The Properer form
sit on an exercise bench with your back straight. Hold a barbell across the back of your neck with an overhand grip wider than your shoulders.keeping your low back as straight as possible.To avoid injury, lower the bar only as far as your unique shoulder structure allows.
This exercise mainly works the lateral and posterior fibers of the deltoids as well as the trapezius, triceps and serratus anterior. To a lesser extent, the rhomboids, infraspinatus, teres minor and supraspinatus are also used.
Dangers to the Shoulder and neck
During the behind the neck barbell press, the tendon , the supraspinatus, can be rubbed and compressed between the head of the humerus and the surrounding articular features. This leads to inflammation and pain and, if not treated, can lead to permanent damage to the tendon resulting in the inability to lift your arm overhead.
The neck is also at risk during the behind the neck barbell press. With each repetition you have to flex your neck forward in order to avoid hitting the back of your head with the barbell. This movement can lead to strained muscles in the neck. Actual blunt trauma is another possible danger of the exercise. Allowing the barbell to come down hard on your neck if your shoulders begin to fatigue can lead to bruising or even more severe injuries such as vertebral fracture.
front press,dumbbell shoulder press