Stamina
From TibiaWiki
Your stamina indicates how much longer your character is able to gain experience. You can hunt for 42 hours until you no longer gain experience from killing creatures, however, the last 14 hours of hunting will only yield half the experience you would normally receive. Within the very first hour (hour 42), premium players will receive an experience bonus of 50%, rounded down to the nearest whole number. When your stamina is drained down to 0, you won't receive experience points at all. To regenerate stamina, you must be logged off, and for every 3 minutes you are logged off your character will gain 1 minute of stamina. However, it will take even longer to regenerate the stamina for hour 42 since you gain way more experience in it. For every 12 minutes you are logged off you get 1 minuted added to the character's stamina. Stamina was added in Update 7.8. Stamina was reduced from 56 hours to 42 hours in Update 8.41
Stamina is only drained when you are gaining experience after killing a monster. If you are training with summoned monsters, being attacked, or making runes, your time of stamina will remain. Thus, if you wish to lose as little stamina as possible, it is tactical to use spells or runes with a large area effect.
Note: Stamina only starts to regenerate after you have been logged off for 10 minutes.
