Q: Apple Watch Heart Rate sensor not giving proper readings during intense exercises like P90x3 and Insanity

I typically see about 12 readings logged per minute or every 5 seconds, not sure if it reads more often and just posts a value. Often during any one of these spans I will see the oddball low reading like chugging along at 100 plus and then 1 or more readings at something like 56 or less, which is physically impossible. I will see a spike up to something like 116 within the multiple readings spanning one minute, this also is highly unlikely - I see the low value a lot more. I frankly think Apple threw the app together as an afterthought. its crazy that apple has not developed some algorithms to filter the data, let us enter our resting heart rate and then toss out any readings below that, do a moving average and compre the readings and toss out the outliers. There are lots of ways the data can be filtered so we're are presented with something useful. They do allow us to manually delete values but it's a royal pain to scroll through the numbers manually. for what it's worth, I hear similar complaints about fit bit's. They use the same green light technology. Slough I also heard the newer models do better. If apple wants the watch to be positioned as a series fitness tool, then they will need to develop some improved algorithms. In my situation, I'm on beta blockers and other meds that limit my heart rate and I also know from multiple tests that my resting heart rate has been fairly consistent at 60-62. I just registered MotiFIT which allows setting custom heart rates so is a lot better for me. only had one workout using it so can't say if it handles the odd readings any better. Hopefully watch os 3 has a major improvement for fitnes.