One of the most common injuries you'll hear about in the gym is a shoulder injury. In fact it's so common that virtually all advanced lifters have suffered some pops, pains, and strains in the shoulders at one time or another.
In fact, if you did an informal survey and simply asked the biggest and strongest guys in the gym if they have ever injured their shoulders during training, I'm willing to bet that the vast majority of them will say YES!
The root cause for most shoulder injuries is an imbalance between the front and rear heads of the deltoids. Very often guys will over work their front delts with bench presses, dips, overhead presses, etc. and the rear delts will receive only a fraction of the training volume in comparison.
