Learn
Seven articles, written by the person who built the app, each with the studies it rests on. Read them in any order. Together they explain why iKima measures what it measures and breathes the way it breathes.
No hidden sensor. What the flash and camera actually see, why 20 seconds is enough, and what the validation studies against ECG found.
What RMSSD measures, why there is no "normal HRV", and the three rules for reading your own trend without fooling yourself.
The vagus nerve, the baroreflex, the Stanford cyclic-sighing trial, and why iKima's default rhythm is 4 seconds in, 6 seconds out.
Research links burnout with lasting fatigue, poor sleep, muscle tension and headaches. Five signs, what the evidence says, and what they do not tell you.
What randomized trials and reviews say about box breathing counts.
Why about six breaths a minute, how the pace varies by person, and what the research on HRV and stress shows.
What SDNN and RMSSD each capture, why recording length matters, and how to read HRV numbers from a watch or phone.
These articles are written for understanding, not diagnosis. iKima is a stress-awareness and breathing tool, not a medical device; heart-rate and HRV readings are for personal reference. If you have a heart condition, talk to a clinician before changing your breathing practice.