Endurance
General proficiency — see Proficiencies for the rules and the Proficiency Index for the full list.
The character is nearly tireless. He does not need to rest every 6 turns of strenuous activity. He gains a +4 bonus to Paralysis saving throws to avoid becoming winded. He can undertake strenuous dedicated activities every day without becoming fatigued. He can work overtime or force march for one day without becoming fatigued, plus one additional day for each point of Constitution bonus. Provided the character does not become fatigued, he just needs a night of restful sleep to be able to work normally the following day. If the character also takes the Labor proficiency, he can work overtime or force march for one additional day.