[QUOTE=MyNameIsTerry;1905786]Think of it this way - it's rare, working out isn't. How many people work out to failure and don't get this? With weights working out to failure is standard if you want to add muscle so if this was common it would be much better known.
So true. I've done workouts where I physically can't lift any more. It's not an unhealthy thing (within reason) and helps build muscle tolerance and strength as Terry said