Doree Shafrir explains:
Each day, the average American spends nearly an hour getting to and from work—and less than 20 minutes at the gym. (Actually, the average American spends no time at the gym, and the fitness freaks drag up the curve for the rest of us.) All that commuting adds up to more than a week on the road every year. If you spent that time exercising instead, you’d have Matthew McConaughey’s PECS, David Beckham’s abs, and Michelle Obama’s arms.
That sets up a column of tips on exercises you can perform while commuting. But I think it should really serve as a reminder that measures that encouraged fewer people to drive to work and more people to walk or bike would have significant public health benefits.