# Author name: wellhero

Source: https://wellhero.co/author/wellhero/page/2/
Language: en-US

[![Histogram showing how 40 of 100 intervals gives AMo50 of 40%](https://wellhero.co/assets/amo50/amo50-histogram.png)](https://wellhero.co/amo50-hrv/)

## [AMo50 Explained: What High and Low Values Mean](https://wellhero.co/amo50-hrv/)

[Guides](https://wellhero.co/category/guides/) · October 2, 2026

Understand the percentage in your HRV report, see a worked example, and learn how AMo50 differs from pNN50 and contributes to Baevsky Stress Index.

[![Apple Watch with a black band on a wrist beside a white shirt cuff](https://wellhero.co/assets/cortisol/apple-watch-on-wrist.webp)](https://wellhero.co/can-apple-watch-measure-cortisol/)

## [Can Apple Watch Measure Cortisol?](https://wellhero.co/can-apple-watch-measure-cortisol/)

[Apple Watch](https://wellhero.co/category/apple-watch/), [Guides](https://wellhero.co/category/guides/) · October 1, 2026

What HRV and stress scores can tell you, how cortisol is tested, and how to follow your readings with Wellhero.

[![workout analytics](https://wellhero.co/wp-content/uploads/2026/02/workout_analytics_cover.jpg)](https://wellhero.co/workout-heart-rate-analytics/)

## [Workout Heart Rate Analytics](https://wellhero.co/workout-heart-rate-analytics/)

[Apple Watch](https://wellhero.co/category/apple-watch/), [Updates](https://wellhero.co/category/updates/)

[![hr and rhr on iPhone](https://wellhero.co/wp-content/uploads/2025/09/hr_in_trends-1024x717.jpg)](https://wellhero.co/a-smarter-way-to-track-resting-heart-rate/)

## [A Smarter Way to Track Resting Heart Rate](https://wellhero.co/a-smarter-way-to-track-resting-heart-rate/)

[Updates](https://wellhero.co/category/updates/)

[![Baevsky Stress Index (BSI)](https://wellhero.co/wp-content/uploads/2024/07/bsi-1024x664.jpg)](https://wellhero.co/revised-norms-for-stress-level-and-baevsky-stress-index-bsi/)

## [Revised norms for stress level and Baevsky Stress Index (BSI)](https://wellhero.co/revised-norms-for-stress-level-and-baevsky-stress-index-bsi/)

[Updates](https://wellhero.co/category/updates/)

 <https://wellhero.co/can-you-trust-apple-watch-for-automatic-hrv-heart-rate-variability-measurements/> 

## [Trusting Apple Watch for HRV: how accurate are the readings?](https://wellhero.co/can-you-trust-apple-watch-for-automatic-hrv-heart-rate-variability-measurements/)

[Research](https://wellhero.co/category/research/)

[![best blood pressure ios app](https://wellhero.co/wp-content/uploads/2024/06/blood-pressure-history-1024x762.png)](https://wellhero.co/how-we-created-the-best-blood-pressure-app-for-iphone/)

## [How We Created the Best Blood Pressure App for iPhone](https://wellhero.co/how-we-created-the-best-blood-pressure-app-for-iphone/)

[Blood Pressure](https://wellhero.co/category/blood-pressure/)

[![HRV with Apple Watch](https://wellhero.co/wp-content/uploads/2024/03/IMG_1378-1024x576.jpg)](https://wellhero.co/heart-rate-variability-with-apple-watch-everything-you-need-to-know/)

## [Heart Rate Variability with Apple Watch: Everything You Need to Know](https://wellhero.co/heart-rate-variability-with-apple-watch-everything-you-need-to-know/)

[Apple Watch](https://wellhero.co/category/apple-watch/)

[![Apple Watch measuring stress](https://wellhero.co/wp-content/uploads/2024/03/IMG_1314-1024x576.jpg)](https://wellhero.co/how-to-measure-stress-level-with-apple-watch/)

## [How to measure stress level with Apple Watch](https://wellhero.co/how-to-measure-stress-level-with-apple-watch/)

[Research](https://wellhero.co/category/research/)

[![not my best hrv value](https://wellhero.co/wp-content/uploads/2024/01/hrv_norms-1024x744.jpg)](https://wellhero.co/what-is-good-hrv-heart-rate-variability-norms/)

## [What is good HRV? Heart rate variability norms.](https://wellhero.co/what-is-good-hrv-heart-rate-variability-norms/)

[Research](https://wellhero.co/category/research/)

[![Smoking and HRV](https://wellhero.co/wp-content/uploads/2024/01/smoking-1024x678.jpg)](https://wellhero.co/effects-of-smoking-on-hrv/)

## [About the effects of smoking on HRV](https://wellhero.co/effects-of-smoking-on-hrv/)

[Research](https://wellhero.co/category/research/)

[![night hrv changes](https://wellhero.co/wp-content/uploads/2023/12/gramin_night_hrv-1024x576.jpg)](https://wellhero.co/why-does-my-hrv-often-change-throughout-the-day/)

## [Why does my HRV often change throughout the day?](https://wellhero.co/why-does-my-hrv-often-change-throughout-the-day/)

[Research](https://wellhero.co/category/research/)

[![coffee and hrv](https://wellhero.co/wp-content/uploads/2023/12/coffee_and_hrv-1024x576.jpg)](https://wellhero.co/effect-of-coffee-and-caffeine-on-the-body-and-heart-rate-variability/)

## [Does caffeine affect heart rate variability?](https://wellhero.co/effect-of-coffee-and-caffeine-on-the-body-and-heart-rate-variability/)

[Research](https://wellhero.co/category/research/)

[![heart rate variability metrics](https://wellhero.co/wp-content/uploads/2023/11/garmin_hrv-1024x576.jpg)](https://wellhero.co/heart-rate-variability-metrics-explained/)

## [Heart Rate Variability metrics explained](https://wellhero.co/heart-rate-variability-metrics-explained/)

[Guides](https://wellhero.co/category/guides/)

[![HRV intervals](https://wellhero.co/wp-content/uploads/2023/11/Heart_rate_variability_HRV-2-1024x385.png)](https://wellhero.co/everything-you-need-to-know-about-heart-rate-variability-hrv/)

## [Heart Rate Variability (HRV): everything you need to know](https://wellhero.co/everything-you-need-to-know-about-heart-rate-variability-hrv/)

[Guides](https://wellhero.co/category/guides/)

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