Why everyone is talking about Zone 2 cardio

Jun 27, 2026 12:16 am

Happy Friday, !

Have you been seeing "Zone 2 cardio" all over your social media feed lately?

It's everywhere right now, and for good reason.

Here's the short version: Zone 2 is a style of cardio where you work at a low to moderate intensity... basically the pace where you can still hold a conversation but you're breathing a little harder than usual.

No sprinting or pushing your limits involved!

Research shows that this mode of workout delivers significant health and fitness benefits.

Here's what Zone 2 training does:

The science behind it is genuinely impressive.

→ It trains your body to burn fat more efficiently because when you work at a lower intensity, your body taps into fat as its primary fuel source.

→ It supports heart health. Zone 2 helps strengthen your heart muscle, improves mitochondrial function within your cells, and increases blood flow to your muscles.

→ It improves your energy. More mitochondria means more energy for everything, not just workouts.

→ It's sustainable. Because the effort level is low, you can do it consistently without burning out or beating up your joints.

How do you know if you're in Zone 2?

You can wear a heart rate monitor, but the talk test is an easy, equipment-free way to check.

You should be able to speak in full sentences, but not comfortably sing. If you're gasping, you're going too hard. If you feel like you could chat easily for an hour, pick up the pace a little.

If you want to use a heart rate monitor, here's how to calculate your personal Zone 2 heart rate:

👉 Subtract your age from 220, then aim to keep your heart rate within 60-70% of that number.

What counts as Zone 2 cardio?