According to the American Academy of Orthopaedic Surgeons, your shoulder is your body’s most flexible joint. Anything from heavy lifting to sports may cause injuries to the shoulder muscles.
There are many exercises that help strengthen the shoulder muscles:
Photo from http://newsroom.aaos.org/media-resources/news/shoulder-injuries.htm
Stretching and strengthening can help reduce the chance of shoulder injuries. It’s important to take these steps to protect your shoulder joints.