Swordsmanship is not a matter of muscles, but the principle of filling and emptying the spiritual vessel.
Run and swing the blade without rest, and your vessel will run dry as the body stiffens.
Stopping an enemy's bloodlust also burns through one's energy.
If you force yourself to endure with an empty vessel, you will eventually collapse, defenseless.
One's energy recovers fastest standing in stillness.
Be patient. Learn to refill the vessel in a momentary stop amidst the heat of battle.
