Exhaustion More Condition_symptoms. What Is The Effect Of Continuing A Set Of Any Exercise To Exhaustion?

What is the effect of continuing a set of any exercise to exhaustion? - exhaustion more condition_symptoms.

I wonder, will the purpose for, burnout or temporary "failure" in a given year. I mean the whole year: heavy weight lifting, weightlifting, gymnastics, running, jumping, swimming, etc. It is always useful, even necessary, to a series or the end of the point I can not do more? Is it bad for you? Is it useful? How many times can you do? Is there ever a time that is necessary or essential to do? Should have done more than once during the training? What are the differences in outcomes between failure and will not to fail? If the total workload is the same between sessions, except that a system failure and used the other has only completed work complete comfort and without going to fail, what is the difference in results of these exercises?