Health & Science

The Science of Health

Deep dive into the advanced metrics and clinical validations behind Auro Tracker's technology.

ECG App Heart Rate Stress Tracking Sleep Science

ECG App: Safety & Performance

The ability of the ECG application to accurately detect AFib and sinus rhythm in ECG recordings has been validated in a clinical study involving approximately 590 subjects.

Clinical Validation

99.5% Accuracy for AFib Detection
Compared to single-lead multi-channel ECG performed by a board-certified cardiologist, the ECG app correctly identified AFib 99.5% of the time and Sinus Rhythm 100% of the time in classifiable records.

Note: Real-world performance can have higher uncertainty. A comparison of simultaneous single-lead multichannel electrocardiograms had 96% agreement.

Understanding Your Results

Sinus Rhythm

Your heartbeat pattern appears normal. The upper and lower chambers are beating in sync.

Atrial Fibrillation (AFib)

An irregular heart rhythm. Left untreated, AFib can lead to stroke or heart failure. Speak with your doctor if you receive this result.

Inconclusive

The rhythm could not be classified. This often happens due to movement or poor skin contact. Rest your arm on a table and ensure a snug fit.

Important Heart Rate Context

Under 50 BPM: May be caused by high fitness levels, medications, or heart conditions.
Over 120 BPM: Common during exercise, stress, or dehydration. The ECG app cannot check for AFib if HR is over 120 or under 50.

Heart Rate Monitoring

The human heart beats 2.5 billion times in an average lifetime. Auro Tracker analyzes this data to provide insights into stress, energy (Body Battery™), and cardiorespiratory fitness (VO2 max).

HR vs. HRV

Heart Rate (HR): Measures beats per minute. Valuable for exercise intensity and resting health.

Heart Rate Variability (HRV): Measures the time gap between heartbeats (milliseconds). High variability indicates your body is recovering; low variability often indicates stress.

RHR vs. HRmax

Resting HR: Changes daily based on sleep and stress (60-100 bpm is normal). Lower is generally better.

Max HR: Does not change daily. It declines with age. Estimated formula: 220 – age = HRmax.

Heart Rate Training Zones

Unlock the full potential of your training by understanding intensity zones.

ZONE 1: Warmup (50–60%) - Relaxed, easy pace. Improves muscle's ability to use oxygen.
ZONE 2: Easy (60–70%) - Comfortable pace, able to hold a conversation. Good for recovery.
ZONE 3: Aerobic (70–80%) - Moderate pace. Strengthens lungs and heart for endurance.
ZONE 4: Threshold (80–90%) - Fast, uncomfortable pace. Improves anaerobic capacity.
ZONE 5: Maximum (90–100%) - Sprint pace, difficult to sustain. Builds power and speed.

All-Day Stress Tracking

Stress levels (0–100) are estimated by the Firstbeat Analytics engine using HR and HRV data. Your Autonomic Nervous System (ANS) has two branches:

  • Sympathetic (Fight-or-Flight): Dominates during action/stress.
  • Parasympathetic (Rest-and-Digest): Dominates during recovery/sleep.

Reading the Chart

0–25 (Blue): Rest / Recovery
26–100 (Orange): Active / Stress

Note: Physical activity is not tracked as "stress" because the physiological strain is different.

Advanced Sleep Tracking

Auro Tracker uses heart rate, HRV, and movement to analyze your sleep architecture.

Light Sleep (N1, N2)

Muscle activity slows. Your body prepares for deep sleep.

Deep Sleep (N3)

Crucial for physical recovery. Eye and muscle movements stop completely.

REM Sleep

When dreaming occurs. Vital for brain processing and learning new skills.

Your Sleep Score

A score of 0–100 calculated based on duration, stress during sleep, and restlessness. Low HR and high HRV during the night indicate strong recovery (Parasympathetic dominance).