It used to be easy to cheat in marathons.
Lost in the crowd, a runner could dip into an alley here or cross a bridge there, maneuvers that would shave a few hundred yards off the field–and vital seconds from one’s time. Motorcycles, rocket packs, teleportation booths: all, at one point or another, have sullied the integrity of sporting events the world over.
Times have changed, but technology changes with it. Polar USA’s Polar RS800CX multisport watch includes a GPS mapper to better plan your athletic deceptions–they thoughtfully opted not to include a tracker, of course–and a “high-end training management system” which I believe includes various poison darts for silently felling competitors.
Multisport RS800CX [Polar USA]
Does it have a heart rate monitor?
VASTLY better, according to those who review such things: the Garmin Forerunner 405.
Link: https://buy.garmin.com/shop/shop.do?cID=142&pID=11039
Link to site w/ comprehensive list of reviews: http://gpstracklog.typepad.com/gps_tracklog/2008/05/garmin-forerunn.html