They did say short time and non chronic. Is sleep deprivation really something one can experience in a short time? In my definition, doing something very diffic

They did say short time and non chronic. Is sleep deprivation really something one can experience in a short time? In my definition, doing something very difficult like lifting a heavy weight qualifies as extreme stress and would be beneficial; some other things would not. Maybe it would work better for you if they added the word "moderate" to their definition, but generally I would agree with their assessment.