Under a new deal between Nike and Polar, runners will soon be able to wirelessly monitor their heart rate (HR) by adding a Polar WearLink chest band to their Nike+ iPod Sport Kit/Band and even compatible fitness club equipment. Users can see or hear spoken feedback on their BPM (beats per minute) during their run, and track their HR data online thereafter. The WearLink+ device will be available for sale in the US starting this month.
Press release: Polar and Nike Introduce Heart Rate Training to Millions of Nike+ Runners…
Product page: Polar WearLink Transmitter Nike…
Polar Adds Heart Rate Monitoring to Nike+iPod
June 14th, 2010 
Medgadget Editors Sports Medicine