The Bed is where a blacksmith must go in order to sleep. The player can only sleep after reaching either of the two levels of exhaustion, and fast forwards the clock by 8 hours. Normally you can sprint continuously, however after 16 hours of being awake the first stage of exhaustion is reached where you can only sprint for short bursts. At the 24 hour mark and beyond the second stage of exhaustion is reached, and the player is completely unable to sprint at this point.