Understanding the 5 Heart Rate Zones

Understand how heart-rate zones work and how they can help you achieve your workout goals.

What's inside: learn the intensity levels, how to use the talk test, and identify what's happening in your body.

Heart-rate zones are one of the easiest ways to make sure your workouts are helping you reach your goals. Your heart rate tells how hard your body is working during exercise.

We divide exercise intensity into zones, from easier effort to all-out effort. Each zone challenges your body in a different way and can help improve things like endurance, heart health, energy, recovery, speed, and overall fitness.

One mistake many people make is training at the same intensity all the time. Using heart-rate zones helps you train at the right intensity for your goal — not just work harder.

The American College of Sports Medicine recommends adults get at least 150–300 minutes of moderate-intensity exercise each week (Zones 2-3) or 75–150 minutes of vigorous-intensity (Zones 3-5) exercise each week.

As exercise intensity increases, your body also changes how it creates energy. At lower intensities, your body relies more heavily on fat for fuel. As intensity increases, your body begins relying more on carbohydrates because they can provide energy faster. Your body is almost always using a mix of both. The ratio simply changes depending on how hard you’re working.

One important thing to remember: heart-rate zones are not one-size-fits-all. Age, medications, fitness level, lifestyle, and health conditions can all affect what zones are appropriate for you.

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Lifestyle Medicine is an evidence-based approach to preventing, treating and even reversing disease by replacing unhealthy behaviors with positive ones—such as eating healthy, being physically active, managing stress, avoiding risky substance abuse, getting adequate sleep and having a strong support system.

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