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.
This uneven development compounds overtime and eventually leads to injury. Now most of the time it's only a minor pop or strain, but sometimes it can lead to a full blown tear in the rotator cuff muscle or tendon (which can be a real bitch to heal) and will hinder all of your workouts in the gym.
I've posted a video clip above that shows some exercises you can do in your workouts to help prevent rotator cuff and shoulder injuries from occurring. And if you already have a shoulder injury now I'll show you some moves you can do to help rehab that injury so you can get back to normal training ASAP.
After you give these exercises a try, please post a comment below and let me know how they work for you...