Sword Art Online 13 - Alicization Dividing Chapter 10 - Integrity Knight Alice 19 limit; that applied to my left hand that had a female knight clad in a heavy golden armor hanging off it too. Physical fatigue in the alternate world, «Underworld», differed a little from its equivalent in the real world. Like reality, walking long distances, running with all your might, undergoing intense practice, or carrying heavy objects would tire one out, but the problem laid in how that fatigue was treated the same as injuries, reducing «Life»—the lives of Underworld dwellers, rendered into numerical values, essentially their hit points. Dying from exhaustion probably hardly happened in the real world. Normally, one would be unable to keep up the activity that caused the fatigue before it could inflict any severe damage to the body. However, willpower breaks through physical limits at times in this world. To state an extreme example, even continuing to run while enduring fatigue and pain until one’s Life hits zero, then collapsing and dying instantly in that moment would be possible. I am currently supporting a ridiculous weight with nothing but my own body. Thus, my Life value must be reducing at a steady rate. Even if I continue tightly gripping my right and left hands with spirit and guts, my Life will eventually become zero and I will die. In all likelihood, this female knight will crash down onto the ground another few hundred meters below and die when my right hand leaves this sword in that instant.