Polar H9 Heart Rate Monitor

Know Your Body. Support Your Healing.

For those living with chronic illness, fatigue, or autoimmune conditions, understanding your body's signals isn't optional — it's essential. The Polar H9 Heart Rate Monitor gives you clinical-grade heart rate and HRV (Heart Rate Variability) data so you can track how your nervous system, immune system, and energy levels respond day to day.

HRV is one of the most powerful biomarkers for monitoring stress load, recovery capacity, and overall resilience — especially for those managing conditions like fibromyalgia, ME/CFS, Lyme disease, long COVID, or adrenal fatigue.

Made for the Free Elite HRV App

Buying a sensor for HRV tracking? This is the one. The Polar H9 is on Elite HRV's official compatible-devices list and pairs with the free Elite HRV app (iOS & Android) in about two minutes:

• ECG-accurate R‑R intervals — Elite HRV needs true beat-to-beat data. Chest straps like the H9 capture the exact R‑wave; wrist wearables smooth or average beats, and closed platforms (Apple Watch, Oura, Whoop, Fitbit) won't transmit to Elite HRV at all
• 2-minute Morning Readiness reading — take your HRV before you get out of bed and get a daily readiness score that tells you whether to push, pace, or rest
• Live biofeedback & guided breathing — watch your nervous system shift in real time during breathwork sessions
• Trends & analytics — see how sleep, treatment, stress, and pacing change your baseline over weeks and months
• No subscription required — the Elite HRV app is free, and the H9 needs no extra hardware or bridge devices

Quick start: download Elite HRV free from the App Store or Google Play → moisten the electrodes and clip on the strap → pair the H9 inside the Elite HRV app (not in your phone's Bluetooth settings) → take your first Morning Readiness reading tomorrow when you wake.

How the Polar H9 Supports Chronic Illness Recovery

• HRV monitoring — track nervous system balance and recovery readiness daily
• Accurate heart rate data — identify overexertion before it triggers a flare
• Pacing support — stay within your energy envelope to avoid post-exertional malaise (PEM)
• Stress & rest tracking — understand how your body responds to activity, sleep, and treatment
• Works with Elite HRV + 200 more apps — including Polar Beat, Polar Flow, and HRV4Training
• Bluetooth & ANT+ connectivity — pairs with phones, watches, and gym equipment
• Water resistant — suitable for gentle swimming and hydrotherapy
• Up to 400 hours battery life — replaceable CR2025, so it's always ready when you are
• Comfortable chest strap — soft textile, size M–XXL, machine-washable, secure and non-irritating

Who This Is For

The Polar H9 is especially valuable for:

• Anyone starting daily HRV tracking with the Elite HRV app who wants readings accurate enough to act on
• Those with ME/CFS, fibromyalgia, or long COVID managing energy and exertion
• People with autoimmune or inflammatory conditions monitoring stress response
• Anyone in integrative or functional medicine care tracking biometric progress
• Patients working with practitioners on nervous system regulation and recovery protocols

What's in the Box

• Polar H9 heart rate sensor
• Polar Pro chest strap (M–XXL)

Pair with your Chorus practitioner's guidance to use your HRV data as part of a holistic healing plan.