Having said that, obtaining heart rate information during your workout is now a snap, and hopefully with the TomTom Runner Cardio GPS sport watch, you will be able to improve your performance with accurate, real-time metrics. This allows one to train in the optimal heart rate zone, where you can choose from one of five intensity zones to match their training goals, as well as be on the receiving end of alerts that let you know whether you need to speed up or slow down. This waterproof watch is also pretty tough, being capable of working in all kinds of weather, and has up to 10 hours of battery life with GPS turned on. The asking price? $269 apiece. [Press Release]