RW tests adidas miCoach, Suunto X10, Oregon Scientific SE300, Timex Bodylink Ironman Triathlon, Polar RS800CX, Garmin Forerunner 405, Nike+ iPod Touch Being able to see how fast and how far you're ...

You have to pity race organisers. They go to great pains to have someone ride round their course measuring it with a Jones-Oerth counter, then 200 runners turn up wearing wrist-mounted GPS computers ...