As you know, we calculate the stress level based on HRV data. For determining stress, we use not some proprietary algorithms, but the Baevsky Stress Index (BSI), which was developed several decades ago and is applied in space medicine. There were no issues with the actual calculation of the index, and we have always provided […]
Revised norms for stress level and Baevsky Stress Index (BSI) Read More »
HRV (Heart Rate Variability) is one of the most reliable ways to assess the state of a person’s nervous system. Any modern wearable device, whether it’s a watch, bracelet, or ring, measures stress levels or readiness for exercise based on HRV. Apple Watch is no exception. Although the watch itself does not calculate stress or recovery levels, it collects all the necessary HRV data from automatic HRV measurements, which can be analyzed by third-party app developers. But how trustworthy are these measurements?
Trusting Apple Watch for HRV: how accurate are the readings? Read More »
We specialize in heart rate and pulse analysis. We decided to focus on blood pressure too because it is a key heart health indicator.
During development, we faced various challenges. But in the end, we created a great feature for tracking and analyzing blood pressure on the iPhone. In this article, we will share the details with you.
How We Created the Best Blood Pressure App for iPhone Read More »
Since the release of the Apple Watch on the market, these watches have been positioned as the most personal and advanced gadget for fitness. Indeed, Apple Watches gather a lot of data about you, including your heart rate variability. The watches use heart rate variability data to track your health, but at the same time,
Heart Rate Variability with Apple Watch: Everything You Need to Know Read More »
Your Apple Watch and phone are capable of measuring stress using astronaut methodology. We’ll show you how to do it.
How to measure stress level with Apple Watch Read More »
So, you are measuring your HRV for the first time, but how do you understand what this number means and how normal it is? We will talk about HRV norms and approaches to determine them.
What is good HRV? Heart rate variability norms. Read More »
We compiled the results of various studies on the impact of smoking cigarettes and smoking cessation on heart rate variability.
About the effects of smoking on HRV Read More »
Users of our app or devices that continuously measure HRV throughout the day (such as Garmin watches or Oura rings) may notice that HRV often changes throughout the day. The reason for this lies in the fact that the functioning of the heart in our body is regulated by the autonomic nervous system (ANS), which
Why does my HRV often change throughout the day? Read More »
In this article, we discuss the impact of caffeine on your body, cardiovascular system, and HRV.
Does caffeine affect heart rate variability? Read More »
In this article, we have tried to collect as many HRV metrics as possible that can be found in different applications and on different devices.
Heart Rate Variability metrics explained Read More »
