Fitness addicts are aware of the dreaded exercise plateau—despite regular exercise, your body no longer performs as well as it did initially. The plateau occurs as an abrupt halt to progress in weight loss or muscle gain, and working hard without seeing progress can make you feel discouraged.
The good news is that plateaus are just the result of your body's impressive ability to adjust to change and stress. To trick your body into becoming efficient once more, try a completely different exercise routine.
If you fell backwards and landed on your shoulder and haven't been able to lift your arm since, you may have a rotator cuff tear. The pain can be excruciating, of course, but the most annoying thing about a rotator cuff tear is that you are physically unable to lift your arm. Every part of everyday life becomes difficult, if not impossible . . . including sleeping.
While many injuries do heal over time and can be ignored, a rotator cuff tear cannot and should not be ignored.