Why Zone 2 Training Is the Ultimate Workout for Your Heart
Heart Health Month: February
February is Heart Health Month, a time to focus on your cardiovascular health and build smart, heart-healthy exercise habits.
Science has shown that low- to medium-intensity workouts provide significant benefits for aerobic fitness and heart health. That “sweet spot” is known as Zone 2, the ideal place to train your heart for better endurance, improved long-term fitness, and overall health.
What Is Zone 2 Training?
Zone 2 training refers to low-intensity, steady-state cardio (often called LISS). Unlike an all-out sprint or a gruelling HIIT session, Zone 2 is performed at a pace where you can hold a conversation but still feel challenged.
It’s a little bit of “less is more.”
Training at this low-to-moderate intensity forms the foundation of aerobic base training. Research shows it is one of the most effective ways to:
Strengthen your heart
Improve endurance
Enhance recovery
Ready to work smarter, not harder? Let’s explore how to make Zone 2 work for you.
How Does Zone 2 Feel?
Zone 2 is a level of heart rate and personal comfort where you are building fitness while still feeling in control and confident.
When training in Zone 2:
You can speak in full sentences (but not sing).
You’re breathing slightly harder than at rest, but not gasping.
On a perceived exertion scale of 1–10, you’re at about a 4–5.
The Technical Definition
Technically speaking, Zone 2 means exercising at 60–70% of your maximum heart rate (MHR).
To estimate your MHR:
220 – your age = estimated MHR
For example, if you are 40 years old:
220 – 40 = 180 bpm (estimated MHR)
Zone 2 range (60–70%) = approximately 108–126 bpm
Why Haven’t I Been Told to Train in Zone 2 Before?
Zone 2 is often overlooked because it feels “too easy.” However, it is incredibly effective.
In this zone, your body:
Efficiently burns fat
Strengthens the heart muscle
Builds endurance
Reduces stress on the body
And the best part? It’s suitable for nearly everyone.
The Science Behind Zone 2 Training
1. Mitochondrial Magic: More Energy, Less Fatigue
Mitochondria are the “powerhouses” of your cells, responsible for converting nutrients into energy.
Over time, Zone 2 training increases mitochondrial density, improving your body’s ability to produce energy efficiently. Fat burning becomes more optimized, leading to:
Better stamina
Faster recovery
Less reliance on quick-burning glucose
This is why many endurance athletes rely heavily on Zone 2 training.
2. A Stronger, More Efficient Heart
Consistent Zone 2 workouts can lower your resting heart rate by improving stroke volume (the amount of blood your heart pumps with each beat).
Over time:
Your heart doesn’t have to work as hard
Oxygen delivery improves
Strain on the cardiovascular system decreases
Blood pressure may improve
This makes Zone 2 one of the most heart-friendly training methods available.
3. Does Zone 2 Burn More Fat Than HIIT?
HIIT burns a high number of calories during the workout itself. However, Zone 2 excels at fat oxidation and trains your body to use fat as fuel more efficiently throughout the day.
Your body becomes better at tapping into fat stores, which is why Zone 2 can be a game changer if fat loss is one of your goals.
How to Do Zone 2 Training at Gym Plus
Speak to your local Gym Plus trainer about setting up a heart-healthy routine tailored to you. The beauty of Zone 2 training is that it can be done on almost any cardio machine.
Zone 2 also complements your favourite Gym Plus classes.
Best Machines for Zone 2 at Your Local Gym Plus
Exercise Bike: Ideal for controlled resistance. Aim for a cadence of 80–90 RPM at moderate resistance. It should feel like you’re pedalling up a gentle hill.
Elliptical Runner: Low-impact and joint-friendly. Keep the resistance light to moderate and maintain a steady pace.
Treadmill (Incline Walk): Set the incline between 8–12% and walk at 3–4 mph. This engages your posterior chain (glutes and hamstrings) while keeping your heart rate in Zone 2.
How Long Should a Zone 2 Session Last?
Each Zone 2 session should last at least 20 minutes, ideally 30–60 minutes if you have experience with aerobic training.
You can:
Replace one HIIT session per week with a Zone 2 workout
Alternate between strength sessions and Zone 2 sessions
Add a Zone 2-focused class to your weekly Gym Plus routine
Ask your personal trainer to adjust your bike or equipment during a class to keep you in Zone 2
If time is limited, alternate strength training and Zone 2 sessions on different days rather than trying to fit everything into one workout.
Work Smarter for Long-Term Heart Health
Zone 2 training may not feel extreme, but that’s exactly why it works.
This sustainable, science-backed approach strengthens your heart, improves endurance, enhances fat metabolism, and supports long-term health.
This February, during Heart Health Month, consider making Zone 2 training a regular part of your routine. Your heart will thank you.
Ready to Book Your Class?
There is no better time than now to step out of your comfort zone.
View the full Class Timetable here
FAQs
Does Zone 2 Improve VO₂ Max?
Yes. Zone 2 helps build your aerobic base, which supports improvements in VO₂ max over time.
It strengthens your heart and improves how efficiently your body uses oxygen. At Gym Plus, our trainers can combine Zone 2 sessions with strength or interval training to help you improve overall performance safely.
Why Is It So Hard to Train in Zone 2?
Zone 2 can feel too easy, and many people naturally push themselves too hard.
It requires patience and heart rate control. At Gym Plus, you can monitor your heart rate on cardio machines and get guidance from a trainer to stay in the correct range.
Is Zone 2 or Zone 3 Better for Running?
Zone 2 is better for building endurance and protecting long term heart health. Zone 3 is more intense and harder to recover from.
Most runners benefit from spending more time in Zone 2. Gym Plus treadmills with incline settings make it easy to train at the right intensity.
Is Zone 2 Best for Fat Loss?
Zone 2 improves your ability to burn fat as fuel and supports consistent training.
For best results, combine Zone 2 cardio with strength training. At Gym Plus, our trainers can design a balanced programme that supports sustainable fat loss.
How Often Should You Do Zone 2 Training?
Most people should aim for 2 to 4 sessions per week. Beginners can start with 20 to 30 minutes per session.
Gym Plus trainers can help you schedule Zone 2 sessions alongside classes and strength workouts.
Should You Sweat During Zone 2 Training?
Light sweating is normal in Zone 2. You should feel warm but still able to speak in full sentences.
If you feel breathless, you are likely above Zone 2. Gym Plus cardio machines make it easy to adjust resistance and stay on track.
