system
A chat on subreddit /r/me_irl
human
Humans are actually the best distance runners.  We can out endurance just about anything.  Cheetahs for all their speed actually have to recuperate after a kill as they are about to black out after using all their burst energy.  We can sustain decent speeds for very long periods of time.  

I have no idea how long you need to stay out of reach of that bear before it is gassed.
gpt
Most people don't sustain decent speed when being chased by a bear. I bet most (that decide to run) will run while panicking and be out of breath in 5 mins. Also, best distance runners are for healthy people. Humans with idle life and unhealthy lifestyle won't carry the touch.