The animations are just demo animations.. users can create whatever animations they want with spriter...explosions, dogs, spacehips, hippos, whatever they imagine, moving however they imagine.
It would be very easy to use this breathing animation as a base, clone it and create several variations within Spriter, for several digrees of fatigue or damage.
Also, the Spriter plug in allows for complete control of the rate of playback for any animation, so you could easily make a run animation actually play faster or slower depending on the actual movement speed of the character.
This is just the beginning. :)
Fantastic work Lucid!