What an odd concept. A pill that produces the muscular benefits of endurance exercise. So, the mice can take the pill, do nothing all day, and run faster than other mice that do nothing all day. Has the potential to treat obesity, help people who can't exercise such as the old or infirm... etc. etc.
Listen, here's the real deal. Soon this drug'll be marketed for military purposes. Faster, stronger, longer lasting soldiers. (Wait did I say military purposes? I meant prostitution.) Eventually the drug'll be found "safe" for public consumption. Everyone'll take it except for a few diehards and some wackos who fear it's government mind-control. About 10 years down the line, its suddenly revealed that the drug causes those who take it to enter an unusual mental stupor, but retain their physical enhancements. Side-effects at that point would include a taste for brains. The world as we know it ends, and wackos and diehard exercisers are all that remain - probably in an unending struggle against each other for land, food, water, and cool headbands (think Richard Simmons vs. Rambo).
It's all in the article, but you have to sort of read between the lines.
~DD