I think the name explains everything. Add “running mode” which nearly doubles the speed of the character for some time and significantly increases hunger, thirst and fatigue. One can say there is “High Adrenaline” for that, but the problem that this trait is activated only when in high danger (pretty pointless though. If you get that much damage you won’t be not able to run away efficiently. Also STR buff is useless in this kind of situation for the same reason - you get so much pain you can barely kill a squirrel let alone a zombie who managed to hit you so hard) and it’s a TRAIT, not something given by default. Also stamina can be implemented easily by adding some status like “exhausted” (from running) which prohibits you from running until it disappears.
