Exercise in a pill?

The Salk Institute’s Ron Evans just released a study where certain drugs trick a mouse’s body into thinking it exercised. Sounds a bit matrix-like to me, but if it could work on humans without side effects, the demand would be overwhelming.

From USA Today:
“Sedentary mice that took the drug for four weeks burned more calories and had less fat than untreated mice. And when tested on a treadmill, they could run about 44% farther and 23% longer than untreated mice.”