Heart Rate Monitors Explained: What They Do & How They Work

If you’re serious about fitness or just want to keep an eye on your health, a heart rate monitor can be a game-changer. But with so many options available, it’s easy to feel overwhelmed. What exactly does a heart rate monitor do? How does it work? And which one should you choose? Let’s dive in and find out!

What is a Heart Rate Monitor?

A heart rate monitor is a device that measures your heart rate in beats per minute (BPM). It provides real-time data on how hard your heart is working, which can help you optimise your workouts, track your fitness progress, and even monitor your overall health.

Types of Heart Rate Monitors

Chest Strap Monitors

These use electrocardiography (ECG) technology to detect electrical signals from your heart. They’re known for being highly accurate and are often preferred by serious athletes.

Arm Strap Monitors

Arm strap monitors work similarly to wrist-based monitors but are worn on the upper or lower arm. They use optical sensors for heart rate tracking but often provide more accurate readings than wrist-worn devices due to reduced motion interference.

Wrist-Based Monitors

These use optical sensors to measure blood flow through the skin. They’re built into most smartwatches and fitness trackers, offering convenience but sometimes sacrificing accuracy.

How Does a Heart Rate Monitor Work?

The way a heart rate monitor works depends on its type:

Chest Strap Monitors

Chest strap heart rate monitors detect electrical impulses generated by your heart and transmit the data to a connected device, like a watch or phone.

Wrist-Based Monitors

Wrist-based monitors use photoplethysmography (PPG) technology, which shines a light into the skin and measures changes in blood flow to estimate your heart rate.

Arm Strap Monitors

Arm strap monitors also use PPG technology but are worn higher on the arm. Because they experience less movement than wrist-worn devices, they tend to provide more stable and accurate heart rate readings, making them a popular choice for athletes who want improved accuracy without the discomfort of a chest strap.

Why Use a Heart Rate Monitor?

Improved Workout Efficiency

Training within specific heart rate zones ensures you’re exercising at the right intensity which means that you’re able to get the most out of your training.

Better Recovery Tracking

Monitoring your resting heart rate and heart rate variability (HRV) can give insight into recovery and stress levels.

Health Monitoring

Keeping an eye on your heart rate can help detect irregularities and provide early warnings for potential health issues.

Motivation & Goal Tracking

Seeing real-time data can help you push harder or slow down when needed.

Which Heart Rate Monitor is Right for You?

Choosing the best heart rate monitor depends on your needs and preferences. Here’s a breakdown to help you decide:

Best for Accuracy & Serious Training: Chest Strap Monitors

If you’re an athlete or someone who needs precise data, a chest strap monitor is the way to go. They’re ideal for high-intensity training and endurance sports like running, cycling, and rowing.

Best for Convenience & Everyday Use: Wrist-Based Monitors

If you prefer something you can wear all day without thinking about it, a smartwatch or fitness tracker with a built-in heart rate monitor is a great choice. While they may not be as accurate, they’re good enough for general fitness tracking and casual workouts.

Key Features to Look For

• Connectivity – Does it sync with your phone, smartwatch, or fitness app?
• Battery Life – Chest straps often last longer than wrist-based monitors.
• Water Resistance – If you swim or sweat a lot, this is an important factor.
• Comfort – You’ll want something that feels good to wear, especially for long workouts.

A heart rate monitor can be a valuable tool for improving fitness, optimising workouts, and tracking your overall health. Whether you go for a chest strap for accuracy or a wrist-based device for convenience, understanding how these monitors work and choosing the right one for your needs will help you get the most out of your training.

If you’re in the market for a heart rate monitor, consider what features matter most to you, and don’t be afraid to experiment with different options. The right device can make a big difference in your fitness journey!

Take a look at the Polar H10 and the Polar Verity for accurate and useful heart rate data throughout your fitness journey.