Standing

A character is in the standing position when they are not sleeping, resting, or in combat. A character can transition to the standing position from the resting position by using the command "stand". A character can transition to the standing position from combat by fleeing, recalling, or by causing all enemy combatants to die or flee/recall.

From the helpfile:

Usage: stand

The stand command can be performed after you are resting. You need to perform
this command in order to move about after resting. You are also automatically
brought to the standing position if someone or something attacks you 
(regardless of what position you were in beforehand).

For more information, see: help wake, help sleep, help rest