|In space, the greatest community commodity is oxygen, and the increased lung capacity gained by a regular physical fitness regimen is essential to survival.|
Fitness is automatically unlocked and can already be learned by using a skill point to learn it.
This skill is automatically learned with the following backgrounds:
By overencumbering yourself, you will use up oxygen faster. Simply add too many items to your inventory, and proceed to sprint and jump until your oxygen bar is empty.
Note, it is NOT enough to simply fully empty the 02 bar (the white bar). You also have to fully fill the C02 bar (the red bar).