I tore my rotator cuff 4 years ago, and it took 5 months before I could do any training at all. It was very trying, having to come up with other hobbies, losing all my strength. I lost about 20 lbs. but once it finally healed (for the most part) I was finally able to make it back in. The gains came back pretty fast, but it was very humbling to say the least. I wouldn't ever want to that again.