When it comes to training, the anterior, or front, deltoid muscle gets almost all the attention, while the medial and posterior deltoids get the cold shoulder.
For a decade, the research has been clear: static, hold-the-pose stretches prior to athletic activity diminish performance and might even open athletes up to injury.
New research published in the European Heart Journal suggests that even people with no signs of cardiovascular disease should exercise to prevent a heart attack.
If you have ever broken an arm and had to wear a cast or splint for a few weeks, you will be familiar with the alarming loss of muscle and uneasy feeling of weakness experienced after removing your cast. Most people do not do much exercise while a broken arm is healing and can struggle with this loss of muscle, known as "atrophy," and weakness for many weeks after the injury.
A pinched nerve in the shoulder occurs when a nearby structure irritates or presses on a nerve coming from the neck. This can lead to shoulder pain and numbness of the arm and hand.
The part of the body we call the shoulder consists of several joints that work with tendons and muscles to allow the arm to move in many directions.