The calm that has come over the area is temporary combat fatigue.
目前的平静只是暂时的战斗疲劳（combat fatigue）。
2
Unconsciously, the eyes repeatedly attempt to rest by shifting their focus to an area behind the screen, and this constant switch between screen and relaxation point creates eyestrain and fatigue.
As many of the muscles that generate movement originate in the core area, good conditioning can help an athlete produce speed and cope with race-day fatigue.