Quick Overview
- Zone 2 is the easy end of cardio, around 60 to 70 percent of your max heart rate
- The test for it: you can talk, but you’d struggle to sing
- Fast maths is 220 minus your age, then 60 to 70 percent of the answer
- Run that for a 38 year old resting at 62 bpm and you get somewhere near 110 to 125 bpm
- Every formula is a rough guide. Feel, and a proper assessment, are what get you the real number
Knowing what Zone 2 is and knowing your own numbers aren’t the same thing. You’ve read the theory. Now you’re on the treadmill, watch on, and the only question that really matters is a small one: am I actually in the zone, or am I just guessing? That’s the gap this post closes. Here’s how to work out your own zone 2 heart rate, and how to keep yourself in it once the session starts.
A Quick Recap: What Is Zone 2?
Zone 2 is steady, gentle cardio you could keep going for ages, running mostly on fat for fuel. The what and the why are already covered in our Gym Plus Zone 2 training guide, so we’ll leave the science there. What that guide doesn’t do is put a number on it for you. That’s the bit people trip on, and it’s all this post is really about: turning Zone 2 from an idea into a figure you can watch on a screen.
How Heart Rate Zones Work
There are five heart rate zones, and Zone 2 is the second one up, sitting at roughly 60 to 70 percent of your maximum. Below it is a gentle warm up. Above it, things get harder in steps until you’re flat out. Zone 2 is where your aerobic base gets laid down, which is why endurance coaches practically live there.
| Zone | Percent of max HR | How it feels |
|---|---|---|
| Zone 1 | 50 to 60 percent | Very light, a warm up pace |
| Zone 2 | 60 to 70 percent | Comfortable, you can chat through it |
| Zone 3 | 70 to 80 percent | Moderate, breathing gets deeper |
| Zone 4 | 80 to 90 percent | Hard, short sentences only |
| Zone 5 | 90 to 100 percent | Maximum, you cannot hold it |
So why does it feel so easy? Because at this effort your body clears lactate about as fast as it makes it, and nothing piles up. Full sentences, no problem. A chorus, though, and you’d be gasping. That little talk test is the cheapest heart rate monitor going, and it still works on the morning you leave your watch on the bedside table.
How to Calculate Your Zone 2 Heart Rate
To find your zone 2 heart rate, work out your maximum first, then take 60 to 70 percent of it. Two methods get you there. They don’t always agree, and it helps to know why before you pick one.
The first is 220 minus your age. Dead simple, needs nothing but your birthday, and that’s exactly its weakness. It’s an average, and real maximums for people the same age scatter by 10 to 12 beats either way. Fine as a jumping off point. Not something to treat as gospel.
The second, Karvonen, brings your resting heart rate into the sum, because a fitter heart ticks over slower when you’re sat still. It works from your heart rate reserve, which is just the gap between your resting and maximum rates. Here’s the catch. It takes a slice of that reserve rather than a slice of your max, so the percentages that describe the same zone come out lower. That mismatch throws people all the time.
Worked example: a 38 year old resting at 62 bpm
The quick way
- Maximum heart rate: 220 minus 38 = 182 bpm
- Zone 2 low: 60 percent of 182 = 109 bpm
- Zone 2 high: 70 percent of 182 = 127 bpm
- So the range is 109 to 127 bpm
The Karvonen way
- Heart rate reserve: 182 minus 62 = 120 bpm
- Zone 2 low: (120 x 0.40) + 62 = 110 bpm
- Zone 2 high: (120 x 0.50) + 62 = 122 bpm
- So the range is 110 to 122 bpm
Both land in the same neighbourhood, low 110s to mid 120s. Good sign. Now, if you feed your numbers into a Karvonen calculator online and it throws back 135 to 145, don’t use it. It’s taken a bigger cut of your reserve, and it’s quietly nudging you up into Zone 3. When two methods argue, side with the lower one.
And none of this is the final word either. People vary a lot, and the only way to know your true aerobic threshold for certain is a lab test, where they track lactate or oxygen use as you work harder. Want your actual number rather than a decent guess? That’s what a fitness assessment is for.
How to Monitor Your Zone 2 Heart Rate During a Gym Plus Session
For accuracy, nothing beats a chest strap. It picks up the electrical signal of your heartbeat, near enough an ECG, pairs with most machines and apps over Bluetooth, and doesn’t wobble halfway through a long effort. If you train by heart rate a lot, it’s the one bit of kit genuinely worth the spend.
Wrist wearables, your Apple Watch, Garmin, Fitbit or Polar, are the easy option, and Zone 2 happens to be where they’re at their best. The optical sensor on the back gets flustered during intervals, or lifting, or anything that keeps bending your wrist. Hold a steady pace, though, and it reads you cleanly. Wear it snug, a finger width up from the wrist bone, and you’ll get a better trace.
The cardio machines on the Gym Plus floor show your heart rate as well. Treadmills, bikes, ellipticals, rowers, they all read it, either off your chest strap or off the metal grips built into the handles. The grips do a job for a quick glance, but they only work while you’re holding on, which is awkward on a rower and worse on an incline walk. For a full session, a strap or watch wins every time.
Forgotten your gadget? The talk test has you covered. Full sentences fine, a chorus a struggle, and you’re about where you want to be. Rough, sure. But it’s never once let anyone down, and it costs nothing.
What Zone 2 Should Feel Like in Practice
Zone 2 should feel easy. Boring, even. That, oddly, is the whole point. It’s also where most people come unstuck. The effort is so light it barely registers as exercise, so the urge is to press a bit harder just to feel like you’re doing something. Give in to that urge and you’ve left the zone.
Where do they end up instead? Zone 3, the band right above. It feels like better value for your sweat. Trouble is, Zone 3 is a bit of a no man’s land. Too hard to build the aerobic base you turned up for, too soft to sharpen your top end, so you get less back than either zone would give you on its own. The fix is dull but reliable: watch the number, don’t trust your legs. Zone 3 never feels like a mistake while you’re in it.
If your rate drifts over the top of your range, ease off before you start blaming the monitor. On the treadmill, drop the speed or knock the incline back. On a bike, rower or elliptical, take the resistance off a notch and let things settle. You’ll probably have to go slower than feels right, and that’s normal. It isn’t a sign you’re unfit.
How to Build Zone 2 Into Your Gym Plus Routine
The Gym Plus machines that suit Zone 2 are the ones you can hold a steady pace on without stopping and starting. The stationary bike is the simplest to dial in and the gentlest on your knees. A treadmill on a slight incline keeps your rate up while you’re only walking. The elliptical and the rower both do the job nicely once you find a rhythm and settle into it.
As for how long, it depends where you’re starting. New to it? Twenty to thirty minutes is plenty, and you can stretch that out as it gets easier. Been at it a while? Forty five minutes is comfortable, and ninety isn’t unusual. The gain comes from time spent in the zone, not from grinding, so long and easy beats short and hard.
Across a week, two or three Zone 2 sessions slot in around your weights and classes without much fuss. Just keep the easy days genuinely easy so they don’t chew into your recovery, and save the hard efforts for other days. Not sure how to juggle it? That’s a five minute chat with a trainer, and worth having rather than winging it.
Want your real number, not an estimate? Book a session with a Gym Plus personal trainer and they’ll measure your Zone 2 range from your own resting rate and fitness, then build the plan around it. Opening hours and booking are at your nearest Gym Plus club. For the bigger picture, there’s our guide to how exercise looks after your heart, and the independent British Heart Foundation for a straight read.
Frequently Asked Questions
What is a Zone 2 heart rate?
Your Zone 2 heart rate is the easy aerobic band, somewhere around 60 to 70 percent of your maximum, where holding a conversation still feels fine. Gym Plus can measure yours exactly with a personal trainer assessment.
How do I calculate my Zone 2 heart rate?
Take 220 minus your age for your maximum, then 60 to 70 percent of that, and you’ve a quick Zone 2 estimate. For your exact range rather than an average, a Gym Plus trainer can assess you.
What should my Zone 2 heart rate be at 40?
At 40, the quick formula puts your maximum near 180 bpm, which lands Zone 2 at roughly 108 to 126 bpm. A Gym Plus assessment tightens that up using your own resting heart rate.
Is a chest strap or a watch better for Zone 2?
A chest strap reads your heartbeat electrically, so it’s the more accurate of the two, though a decent wrist wearable is close enough for steady Zone 2 work. Both link up with the cardio machines at Gym Plus.
Why does my heart rate feel too easy in Zone 2?
Zone 2 is supposed to feel easy, and that gentle effort is exactly what builds your aerobic base and burns fat. Gym Plus trainers can show you how to hold it without creeping into a harder zone.
How long should a Zone 2 session last?
Most people want 30 to 60 minutes in Zone 2, with beginners closer to 20 or 30 to start. The cardio machines at Gym Plus make it easy to sit at a steady effort for that long.
