In reply to Tom Briggs:
> People pair Polar HR straps with Coros. The Polar Verity Sense can be used on the upper arm if you don't like chest straps. Keep meaning to get one because...
> ...I've had an Apex for over a year now. Really rate it overall but the wrist-based HR sensor is not reliable. If you want to track your HR data over time over the same runs, you just can't trust it. Which is irritating.
Thanks for the feedback Tom, I hadn't seen that reported elsewhere, and haven't got a Polar HR strap to try it out with, so wasn't aware of that, but it's good to know. As per the sentiments within the review, I've found it to be fairly accurate in some regards, but really inaccurate in others. Either way, I agree with exactly what you've said: if you want accurate results, never, ever rely on a wrist-HR.
> Also, some of the data in the App around fitness/fatigue/performance etc is just plain daft. It even gives predicted race times for distances slower than the... race times you've recorded on the watch!
I think I fell through some of the gaps here, because I don't take place in any of the events that the watch predicts time for (i.e. 5k, 10k, Half Marathon, Marathon etc...). I think if you're an outright road runner they'd be more accurate, but the watch - and the software - finds it hard to handle the data from trail running. Part of me wonders whether it's this that's caused it to come back with dodgy data for you, because I know you blend the two (i.e. road and trail). Either way, it felt - at least to me - like it offered a lot more performance data for the road/track runner, but maybe they're just a much easier group to calculate for due to the consistency of the terrain and pace?