The representation of physical resilience and durability.

0: Dead or close to it.
1: Typically unhealthy or loses breath on exertion.
2: The average adult.
3: Somewhat athletic, can exercise for a period of time without becoming tired.
4: Capable of constant and prolonged activity.
5: The type of individuals that can take several wounds or highly exhausting physical situations and persevere.
6: An unnatural ability to keep going and withstand anything.