The old man averages over seven hours of combat each day, and the reason for any interruptions isn't due to his physical capabilities being inadequate. Instead, it's because the Imperial Mechas on the battlefield, along with the fortifications and the like, have all been shattered by him.
Why am I so certain? Because in the past week, not only has the old man been constantly in battle, but he has also bestowed the Second Stage Realm's grace to medical personnel, ten persons at a time. This means that his physical condition allows him to engage in such high-intensity combat for at least twenty-four hours continuously.
Now, do you understand the gap between us and the old man?"
Indeed, we do.
Cadelin can only last for half an hour; what about the rest of us?
Although our common combat missions all exceed half an hour, the problem is the intensity isn't the same.