Exercise in a pill? Drugs show promise in mice

Here's a couch potato's dream: What if a drug could help you gain some of the benefits of exercise without working up a sweat?

Scientists reported Thursday that there is such a drug — if you happen to be a mouse.

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 percent farther and 23 percent longer than untreated mice.

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