Stamina

Below Average Human: Can sustain themselves without tiring for less than a minute

Average Human: Can sustain themselves without tiring for several minutes

Above Average Human: Can sustain themselves without tiring for half an hour

Olympic Level: Can sustain themselves without tiring for an hour

Peak Human: Can sustain themselves without tiring for several hours

Enhanced: Can sustain themselves without tiring for a day

Superhuman: Can sustain themselves without tiring for several days

Absolute: Can sustain themselves indefinitely