![How CrossFit Reykjavik improves retention with heart rate training | Polar Club Customer Story - YouTube How CrossFit Reykjavik improves retention with heart rate training | Polar Club Customer Story - YouTube](https://i.ytimg.com/vi/eQgg62SG0j4/maxresdefault.jpg)
How CrossFit Reykjavik improves retention with heart rate training | Polar Club Customer Story - YouTube
![WHOOP on Twitter: "WHOOP is now the Official Wearable of @CrossFit. Get ready to experience CrossFit® in a new way as we showcase real-time data through #WHOOPLive and share stories of optimization WHOOP on Twitter: "WHOOP is now the Official Wearable of @CrossFit. Get ready to experience CrossFit® in a new way as we showcase real-time data through #WHOOPLive and share stories of optimization](https://pbs.twimg.com/media/Evo_iTHXIAATB--.jpg:large)
WHOOP on Twitter: "WHOOP is now the Official Wearable of @CrossFit. Get ready to experience CrossFit® in a new way as we showcase real-time data through #WHOOPLive and share stories of optimization
![Polar H10 drop during training. This is started from June. I have reset the H10 sensor but it is still dropping during the workout (crossfit). I have 2 possible scenarios.1) the o-ring Polar H10 drop during training. This is started from June. I have reset the H10 sensor but it is still dropping during the workout (crossfit). I have 2 possible scenarios.1) the o-ring](https://preview.redd.it/ch8apbsptm971.jpg?width=640&crop=smart&auto=webp&s=ff20351b546165215f6fd2c8fcf9464a714d86b3)