Type: Flaw
Source: Dragon #333
You have limited stamina and you easily become exhausted by physical tasks.
Prerequisite: Constitution 13 or lower.
Benefit: Whenever you make a Strength check, a Constitution check to continue running, or use the skills Climb, Jump, or Swim, you must make a Fortitude save at the same DC as the skill or ability check. If you fail this save, you become fatigued.
Normal: Doing something else that would normally cause fatigue exhausts an already fatigued character. An exhausted character suffers no further penalty by doing something else that would normally cause fatigue.