Shoulder problems are one of the most common, if not THE most common, injuries sustained in the gym. The shoulder is a complex joint and can easily be damaged. Very often, once a shoulder is injured, it provides grief for a very long time, or even forever.
The most common causes of shoulder injuries are lifting too heavy, poor form (especially using momentum in pressing exercises), and overtraining. Heavy presses are the worst exercises for placing huge strain on the shoulders. It is better to do four well-controlled, focused sets than eight jerky and poorly executed ones. Incorporate neutral grips in your workouts, and avoid overdoing wide grip exercises like chins. Always warm up thoroughly.
LTC Torque Fitness&Wellbeing™ Team!