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POLAR VANTAGE M Advanced Running & Multisport Watch with GPS and Wrist-based Heart Rate (Lightweight Design & Latest Technology), Black, M-L
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How to use your running watch as a coach; it's not just GPS that will help run further, faster and smarter
![Research update: new publication on the relation between estimated VO2max and real life running performance Research update: new publication on the relation between estimated VO2max and real life running performance](http://www.hrv4training.com/uploads/1/3/2/3/13234002/screenshot-2017-01-06-17-34-36_1_orig.png)
Research update: new publication on the relation between estimated VO2max and real life running performance
![My running index development from last 2 months. I think these values are bit too high tbh. How yours look like? : r/Polarfitness My running index development from last 2 months. I think these values are bit too high tbh. How yours look like? : r/Polarfitness](https://preview.redd.it/gjtcyni283l51.jpg?width=640&crop=smart&auto=webp&s=f7e01a7d98c333fae3c72bb49ae60ae3df178aa5)