During training we are constantly subjugating our body’s messages about physical fatigue and our mind’s messages that try to undermine our resolve to continue. As the body tires and the mind weakens, the urge to slow down or ‘cheat’ oneself rises. However the crushing of this urge is central to training.
When one’s muscles are so exhausted that they feel like dish-rags, that is the point where every technique with full commitment that the practitioner executes pushes his limitations forwards, and it is at this point that the utmost determination is required to keep going. It is also the point of greatest learning, as the muscles are relaxed through exhaustion, and the body can move most freely.