FITNESS - Aetolia Online Help

9.4.3 FITNESS

The benefit of exercise, whether by single combat or simple running,    
have long been known in Aetolia and Fitness is the skill with which you 
will strengthen your lungs and increase your endurance. As your fitness 
increases, you will find yourself recovering endurance more quickly.    

Additionally, your skill level in fitness will reduce the damage you    
take from asphyxiation based attacks.