HRV4Training

I like the idea behind this concept of taking HRV readings consistently in the morning when wake up and keep track of the trend. Unfortunately the SW does not take in readings from Apple Watch in a consistent manner, especially since updated to iOS 17 and watch OS 10, it doesn’t take readings at all.

I like the app and its clear the developer is an expert in this field. The data science side of the tool is excellent. However, I have all 4 HRV apps from the developer and they return different readings when taken back to back. For example, the past three days I’ve checked rMSSD using both HRV4Training (A) and camera HRV (B) and the values have been: A=75, B=44 A=91, B=67 A=98, B=69 So at least they trend together, and the trend matters far more than the actual value. Still curious though!

I’ve followed the directions for measuring HRV on the phone carefully but I don’t feel I can trust it. Sometimes I get two wildly different numbers measuring back-to-back in the same position. Other times I’m not moving my finger at all but halfway through the measurement it will tell me I need to reposition my finger, and do this about five times. I have an iPhone 13 mini.

After having tried a bunch of the HRV apps, this is definitely the best. Not only does it work consistently, which cannot be said for other apps, it is by far superior on being able to see trends over time.

The best way to take and analyze HRV and HR data that I have used outside of a lab. This is well worth it!