# Is the Garmin Forerunner 970 heart rate sensor accurate?

> Expert answer about Garmin Forerunner 970 heart rate accuracy

*Published: 2026-03-17 | Updated: 2026-03-17 | Source: https://shopsavvy.com/answers/is-the-garmin-forerunner-970-heart-rate-sensor-accurate*

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## Product: Garmin Forerunner 970
**Brand:** Garmin

The short answer? Yes, surprisingly accurate for a wrist-based sensor.

The [Forerunner 970](https://www.amazon.com/dp/B0F8QZ7233?tag=shopsavvy01-20) uses Garmin's new Elevate Gen 5 heart rate sensor, and honestly, it's impressed a lot of people. In head-to-head tests against chest straps like the Polar H10, readings were consistently within **1-2 BPM**. That's about as good as wrist-based tech gets.

For most of your training, you probably won't need a chest strap at all. Steady runs, tempo efforts, easy recovery days, cycling sessions. The wrist sensor handles all of these really well. Even resting heart rate measurements matched chest straps exactly in testing.

But let's be real about the limitations. When you're doing hard intervals and your heart rate is spiking quickly, there can be a slight delay in the readings. It's the nature of optical sensors. They're reading blood flow through your skin, not direct electrical signals like a chest strap does.

Swimming is where things get trickier. Water messes with optical sensors on all smartwatches, so if accurate swim HR data matters to you, a chest strap is still the way to go.

**Quick tips for better accuracy:**
- Wear it snug, about a finger's width above your wrist bone
- Make sure the sensor area stays clean
- In cold weather, the sensor might take longer to lock on

One thing to know: some of the fancier metrics like Running Economy actually *require* the [HRM 600 chest strap](https://www.amazon.com/dp/B0CXVFBHCS?tag=shopsavvy01-20). So if those features are important to you, budget an extra $170 or so.

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*Where this comes from: This answer is based on ShopSavvy's product database, real-time pricing from thousands of retailers, and analysis of user reviews to give you a well-rounded picture.*