I did the same comparison between OHR and HRM-Run as I did on the thread "OHR vs HRM-RUN: completely useless (for me)", only during a running activity.
There's not much to say - the results are quite amazing. Except for several glitches, the OHR does an amazing job. It also picked up changes in HR very well, including the one fast km I did towards the end, and including the recovery from it. Well done OHR (during running)
A little number analysis about the % of gap between OHR and HRM-Run HR:
- Super accurate (less than 3% gap): 92.0% of the time
- Acceptable (between 3% and 10% gap): 6.5% of the time
- Not accurate (between 10% and 30% gap): 1.4% of the time
- Very inaccurate (between 30% and 50% gap): 0%
- Ridiculously inaccurate (more than 50% gap): 0%