GPS Running Watches for high-tech athletes are just here. But which is the best GPS running watch for all serious runners? I spent several years of training with a heart rate monitor. It is the best way to improve my fitness training at the right intensity because I know that I will not be over or under training. It's also a perfect running partner because it helps me to be motivated all the time and it gives me the evidence of my progress. It's like to have the perfect coach who has the exact data to tell you what you need to do at each step.


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