Aside from the blatantly obvious 'they get exhausted', I've no idea what answer you're after
Science Trivia
#661
Posted 07 September 2008 - 11:45 AM
Feed the plushie!
(Rayquaza plushie? WTF? It doesn't look anything like the other plushies!)
Through our bleeding we are one.
#667
Posted 09 September 2008 - 01:48 AM
Exactly. They store 90% of the heat their muscles produce while they are running (other mammals in their geographic range only store about 20%), so their temperature skyrockets, and they won't run anymore once their temperature hits about 104F (obviously continuing would lead to organ damage).