"He's been doing some running on the field in straight lines, but when you've got a knee injury it's twisting and turning that causes aggravation and I think he needs to test it in the county game first, " he added.

BBC: SPORT | Cricket | England | Vaughan cools England return talk

Because you can get the exercise you need from walking your dog vigorously, running with your dog, doing some push-ups at home, or just playing.

WHITEHOUSE: President's Council on Fitness, Sports & Nutrition

In the streets of Port-au-Prince there are signs that aid money is doing some good, but it is not nearly enough and time is running out.

BBC: Time 'running out' for quake-hit Haiti orphans

"If you are running more than 15 miles a week, you are doing it for some reason other than health, " said Dr. Cooper, adding that he suspects without hard evidence that extreme exercise can render a body more susceptible to cancer.

WSJ: Endurance Sports: Studies on Older Endurance Athletes Suggest the Fittest Reap Few Health Benefits

However, there are some drawbacks to both winning the contest and to running it the way Google is doing.

FORBES: Sorry, Google. Here Come The Inevitable #IfIHadGlass Bashtags.

Well, after doing some digging through our own records, we're seeing quite a few instances of hardware running the unannounced Google platform visiting Engadget.

ENGADGET: blogger-avatar