Zone 2 training explained: what it is, how to find it, how much to do
Zone 2 is easy, conversational aerobic exercise at about 60 to 70% of maximum heart rate. How to find your zone, how much to do each week, and how it fits with hard days.
revns editorial · Published November 12, 2026 · 7 min read
Zone 2: steady, conversational effort at roughly 60–70% of max heart rate. Most endurance training is easy; add one or two hard sessions a week.
Zone 2 is steady, easy aerobic exercise at roughly 60 to 70% of your maximum heart rate, the pace at which you can still hold a conversation. It builds the aerobic base that most endurance fitness rests on, it is easy to recover from, and for most people it should make up the majority of their cardio. Pair it with one or two harder sessions a week if you want to get faster.
TL;DR
| Question | Short answer |
|---|---|
| What is it? | Easy, conversational effort, about 60–70% of max heart rate |
| How to find it | Heart rate zone calculator, or the talk test |
| How much? | Most of your 150–300 weekly minutes of moderate activity |
| What else? | One or two hard sessions a week, and rest days |
What are heart rate zones?
Training zones split effort into bands based on your maximum heart rate (or your heart rate reserve, which also uses your resting heart rate). A common five-zone model:
| Zone | % of max heart rate | How it feels |
|---|---|---|
| 1 | 50–60% | Very easy, recovery |
| 2 | 60–70% | Easy, full sentences |
| 3 | 70–80% | Steady, short sentences |
| 4 | 80–90% | Hard, a few words |
| 5 | 90–100% | Very hard, short efforts |
Maximum heart rate is often estimated as 208 − 0.7 × age (the Tanaka formula), which is more accurate in older adults than the older 220 − age. A recent all-out effort or a field test gives a better personal number. The heart rate zone calculator works out your zones either way.
Why does easy training work?
Easy aerobic work improves the heart's pumping capacity, the blood supply to muscles, and the muscles' ability to use oxygen and fat for fuel. Because it is easy, you can do a lot of it without the fatigue that piles up from hard sessions, and volume is what drives much of the adaptation.
Studies of endurance athletes describe a "polarised" pattern: most training at low intensity and a smaller share at high intensity, with relatively little in between. In a 2014 study of 48 well-trained endurance athletes, a nine-week polarised block improved key endurance measures more than programmes built on threshold work, high-intensity work or high volume alone. You do not need to be an athlete to borrow the principle: mostly easy, a little hard.
How do I find zone 2 in practice?
Three ways, from simplest to most precise:
- Talk test. You can speak in full sentences but would not choose to sing. Breathing is deeper than at rest but controlled.
- Heart rate. Stay in the zone 2 band from the calculator. Expect heart rate to drift up slowly in long sessions, in heat, and when you are tired.
- Perceived effort. About 3 to 4 out of 10.
Walking briskly uphill, easy cycling, swimming at a relaxed pace, rowing and easy running all count. For many new runners, zone 2 means slowing down a lot, or mixing running with walking. That is normal.
How much zone 2 should I do each week?
The WHO's 2020 guidelines recommend adults do 150 to 300 minutes of moderate aerobic activity a week, or 75 to 150 minutes of vigorous activity, or a mix, plus muscle-strengthening work on two or more days. Zone 2 sits in the moderate band, so most of that time can be zone 2.
A simple starting week:
- Three sessions of 30 to 45 minutes in zone 2 (walk, run, ride, swim).
- One harder session once you have a few weeks of consistency: for example, 4 × 4 minutes hard with 3 minutes easy between.
- Two strength sessions.
- At least one rest day.
The revns week planner spaces sessions like this from your own history and keeps you from stacking three hard days in a row.
How do I know zone 2 is working?
Look for slow, steady changes over four to eight weeks rather than session to session:
- Same pace, lower heart rate. Your usual easy route or loop takes the same time at a few beats per minute less.
- Same heart rate, faster pace. Or you cover more distance in the same zone 2 time.
- Easier hard days. Intervals feel more manageable because you recover faster between them.
- Lower resting heart rate, often, though sleep, stress and illness move it too.
Log one benchmark every few weeks, such as a 30-minute easy run's distance or a field estimate from the VO2 max calculator, and compare like with like.
What are the most common mistakes?
- Going too hard on easy days. The most common error. Easy days that drift into zone 3 leave you tired for the hard days and slow progress.
- Ignoring the basics. Sleep and food determine how well you absorb training; see how much sleep you need.
- Changing everything at once. Increase weekly time gradually rather than doubling it.
Is zone 2 safe for everyone?
Moderate activity is safe and beneficial for most adults. If you have a heart condition, take medication that changes your heart rate (such as beta blockers), or are returning after a long break with health concerns, talk to a clinician about how to judge effort. Stop and seek help for chest pain, fainting, or unusual breathlessness.
Can I do zone 2 if I am a beginner?
Yes, and it is the best place to start. For many people new to exercise, a brisk walk already reaches zone 2, and that is exactly where to begin. Build to three sessions of 30 minutes a week, then lengthen them before adding anything hard. Running beginners often find that walk-run intervals (for example, one minute running, two minutes walking) keep heart rate in zone 2 while the body adapts.
Is zone 2 enough on its own?
For general health, regular moderate activity like zone 2 meets the guidelines. For performance, most programmes add some harder work: intervals raise VO2 max and speed in ways easy training alone does not. A common and well-supported pattern is to keep roughly four fifths of your training easy and one fifth hard. Strength training twice a week completes the picture, as the WHO recommends.
What about heart rate drift?
On long or hot sessions, heart rate creeps up even at the same pace, a pattern called cardiac drift. It is normal and partly reflects dehydration and heat. Two practical responses:
- On easy days, slow down to keep heart rate in zone 2, or accept a few beats of drift in the last third.
- Drink on longer sessions, especially in heat.
Do I need a watch or chest strap?
No. The talk test works well. If you do use a device, chest straps are generally more accurate than wrist sensors during exercise, especially at higher intensities and in activities with a lot of arm movement. Whatever you use, compare yourself with yourself over weeks.
A four-week zone 2 starter block
| Week | Sessions | Duration |
|---|---|---|
| 1 | 3 | 25–30 min |
| 2 | 3 | 30–35 min |
| 3 | 4 | 30–35 min |
| 4 | 3 | 35–45 min, one slightly longer |
Keep every session conversational. In week five, if things feel easy, add one short interval session and keep the rest the same.
How does zone 2 fit with strength training?
They work well together, and the WHO guidelines recommend both. A few practical rules keep them from getting in each other's way:
- Separate hard days. Put intervals and heavy leg sessions on different days, or at least several hours apart.
- Zone 2 is a good partner for strength days. Easy cardio after upper-body work, or on the morning of a lifting evening, rarely hurts strength progress.
- Watch total fatigue. If both strength and endurance stall, the fix is usually more sleep, more food or one more easy day, not more training.
A sample week for someone who wants both: strength on Monday, Wednesday and Friday; zone 2 for 30 to 45 minutes on Tuesday, Thursday and Saturday; rest or a walk on Sunday. Once that feels routine, turn one of the zone 2 sessions into intervals.
What about people with a busy week?
Short sessions still count. The WHO guidelines note that every bit of activity adds up, and three 15-minute brisk walks give a similar weekly dose to one 45-minute session. If your week is unpredictable, plan the minimum (three short easy sessions and two short strength sessions) and treat anything extra as a bonus. Consistency over months matters far more than any single week.
Quick check before you start
Write down your zone 2 range, pick two or three activities you enjoy, and put the sessions in your calendar like appointments. Then log each one. After a month, look back at the trend rather than any single day.
Related
- ACS prostate cancer screening 2026
- Heart rate zone calculator
- Running pace calculator
- VO2 max calculator
- How much sleep do you need?
- What is HRV? Heart rate variability explained
This is general training guidance, not medical advice.
Sources
- Bull FC et al. World Health Organization 2020 guidelines on physical activity and sedentary behaviour. Br J Sports Med 2020
- Stöggl T, Sperlich B. Polarized training has greater impact on key endurance variables than threshold, high intensity, or high volume training. Front Physiol 2014
- Tanaka H et al. Age-predicted maximal heart rate revisited. J Am Coll Cardiol 2001
- WHO. Physical activity fact sheet
Terms in this post
revns publishes training and nutrition guidance, not medical advice. See a clinician for symptoms, injury or a medical condition. Accurate as of November 12, 2026.
