A whole new meaning to "gym rats"
When we see someone who exercises obsessively our society tends to admire them. Can't miss a day, feel guilty if they don't go, ignore pain and injury.
What if it was a rodent running on a wheel, unable to stop despite losing weight and losing appetite and eventually... dying. Sounds different, right? Doesn't sound like virtue, or a choice, or a response to society's pressure to be thin.
"Rats given the combination of unrestricted access to an activity wheel and restricted access to food can lose weight to the extent that they will die unless removed from these conditions."
Got a "gym rat" in your life?