Question 1

What is my Zone 2 heart rate?

Accepted Answer

For most people Zone 2 is 60–70% of maximum heart rate. With the classic 220 − age estimate that is about 111–130 bpm at 35, 108–126 bpm at 40 and 102–119 bpm at 50. If you know your resting heart rate, the heart rate reserve (Karvonen) method gives a personalised range that is usually higher.

Question 2

How does Apple Watch calculate heart rate zones?

Accepted Answer

Apple says its five heart rate zones are a percentage of your maximum heart rate, calculated automatically and personalised with your health data (a date of birth in the Health app is required). It doesn’t say how it estimates your maximum. You can set zones 2, 3 and 4 manually in Settings → Workout → Heart Rate Zones on the watch, or in the Apple Watch app on iPhone → My Watch → Workout → Heart Rate Zones.

Question 3

Why do Zone 2 calculators give different numbers?

Accepted Answer

They use different formulas. Percent-of-max methods ignore your resting heart rate, the Karvonen method adds it, and MAF uses 180 minus your age. For the same 40-year-old the results can differ by 20–30 bpm, which is why a talk test or a lab test is the best check.

Question 4

What is the Zone 2 heart rate for women?

Accepted Answer

The standard methods work for women too. The Gulati formula (206 − 0.88 × age), developed from 5,437 women, gives a slightly lower maximum heart rate and therefore a Zone 2 a few beats lower than 220 − age.

Question 5

How much Zone 2 training per week?

Accepted Answer

The WHO recommends 150–300 minutes of moderate activity (or 75–150 minutes of vigorous activity) a week plus strength training on two days, and many coaches suggest about three hours of easy Zone 2 work spread over three to four sessions. A 2025 review found that Zone 2 is not uniquely better than higher intensities for fitness, so mixing in some harder sessions helps.

Question 6

Is Zone 2 best for fat loss?

Accepted Answer

Not necessarily. Zone 2 burns a higher share of fat while you exercise, but total calories and consistency matter more for weight loss. It is a comfortable intensity you can do often, which is its main advantage.

Question 7

What is the talk test?

Accepted Answer

If you can speak in full sentences but would rather not sing, you are around Zone 2. If you can only say a few words, you are above it. Reviews of talk-test studies find that comfortable speech is possible below the ventilatory threshold and not above it.

Question 8

Is MAF the same as Zone 2?

Accepted Answer

Not exactly. MAF (180 − age) is an upper limit for easy aerobic training. For people under about 50 it lands well above 60–70% of max — at 35 it is 145 bpm versus 111–130 — and much closer to the heart rate reserve method and to lab-measured first thresholds in trained people.

Question 9

Is 140 bpm Zone 2?

Accepted Answer

It depends on your age and the method. By 60–70% of 220 − age, 140 bpm is Zone 2 only if you are 20 or younger; for most adults it is Zone 3 or higher. By heart rate reserve with a resting heart rate of 60, 140 bpm is Zone 2 at roughly 27–45 years old. By MAF, 140 bpm is the aerobic ceiling at 40 (180 − 40), so it is within MAF for anyone 40 or younger without adjustments.

Question 10

Can walking be Zone 2?

Accepted Answer

Yes, for many people. The CDC counts brisk walking (about 2.5 mph or faster) as moderate-intensity activity, and the ACSM puts moderate intensity at 64–76% of maximum heart rate, which overlaps Zone 2. Beginners, older adults and people returning to exercise often reach Zone 2 walking briskly; fitter people usually need hills, an incline or very easy jogging.

Question 11

How long should a Zone 2 session be?

Accepted Answer

There is no research-based minimum: the WHO 2020 guidelines dropped the old 10-minute rule, and every minute counts toward 150–300 minutes a week. In practice, 30–45 minutes suits beginners and 60–90 minutes is common for endurance athletes. In long sessions heart rate drifts upward at the same pace, so slow down to stay in range.

Question 12

What is the difference between Zone 2 and Zone 3?

Accepted Answer

In the common five-zone model (the Polar and Garmin defaults), Zone 2 is 60–70% and Zone 3 is 70–80% of maximum heart rate: in Zone 2 you can talk in full sentences, in Zone 3 only a few sentences at a time. Sports scientists also use a three-zone model in which zone 1 is everything below the first threshold, so their “zone 2” is harder. A 2025 expert panel defined Zone 2 training as just below the first lactate or ventilatory threshold.

Question 13

Is Zone 2 different for cycling and running?

Accepted Answer

Often slightly, and it varies a lot between people. In 16 triathletes, heart rate at the threshold averaged 154 bpm on a bike and 157 bpm on a treadmill, but the individual error between the two was about 12 bpm. In 371 athletes, threshold heart rates in cycling and running did not correlate. If you do both, set cycling zones from a cycling max or test.

Question 14

Is Apple Watch accurate enough for Zone 2?

Accepted Answer

For steady running or cycling, usually yes. In a Cleveland Clinic study against ECG, the Apple Watch agreed well (concordance 0.92), second only to a Polar chest strap (0.996), and all wrist devices were least accurate on an elliptical with arm levers. Wear the watch snugly; for intervals, rowing or other arm-heavy exercise, pair a chest strap. That study tested an early Apple Watch model.

Question 15

What is Zone 2 heart rate after 50 or 60?

Accepted Answer

At 50, 60–70% of 220 − age gives 102–119 bpm (104–121 by Tanaka); at 60, 96–112 bpm (100–116 by Tanaka). The Tanaka formula fits older adults better than 220 − age. Beta-blockers and some other medications lower heart rate, so ask your doctor for your zones if you take them. The WHO also advises adults over 65 to do balance and strength activities on three or more days a week.

Question 16

What does a Zone 2 training week look like?

Accepted Answer

One example of about three hours: two 45-minute Zone 2 sessions on weekdays, one 75–90-minute long Zone 2 session at the weekend, one harder interval session, and strength training on two days. Adjust the volume to your current fitness and add time gradually.

Question 17

Why does my Zone 2 feel so slow?

Accepted Answer

Because 60–70% of an estimated maximum is a conservative range. In a 2025 study of 50 trained cyclists, the first ventilatory threshold averaged 81% and maximal fat burning 72% of measured maximum heart rate, with large individual differences. If you are fit, the heart rate reserve method or a lab test will usually put your Zone 2 higher. Heat, caffeine and long sessions also push heart rate up at the same pace.

Zone	bpm	How it feels
1 · Recovery	93–111	Very easy; you could chat for hours.
2 · Aerobic base	111–130	Easy; full sentences, and for many people nose breathing.
3 · Aerobic	130–148	Moderate; a few sentences at a time.
4 · Threshold	148–167	Hard; only short phrases.
5 · Maximum	167–185	All-out; no talking.

Age	60–70% of 220 − age	60–70% of Tanaka max	60–70% of Gulati max (women)	Karvonen 60–70%, resting HR 60	MAF ceiling
20	120–140 bpm	116–136 bpm	113–132 bpm	144–158 bpm	160 bpm
25	117–137 bpm	114–133 bpm	110–129 bpm	141–155 bpm	155 bpm
30	114–133 bpm	112–131 bpm	108–126 bpm	138–151 bpm	150 bpm
35your age	111–130 bpm	110–128 bpm	105–123 bpm	135–148 bpm	145 bpm
40	108–126 bpm	108–126 bpm	102–120 bpm	132–144 bpm	140 bpm
45	105–122 bpm	106–124 bpm	100–116 bpm	129–141 bpm	135 bpm
50	102–119 bpm	104–121 bpm	97–113 bpm	126–137 bpm	130 bpm
55	99–115 bpm	102–119 bpm	95–110 bpm	123–134 bpm	125 bpm
60	96–112 bpm	100–116 bpm	92–107 bpm	120–130 bpm	120 bpm
65	93–109 bpm	98–114 bpm	89–104 bpm	117–127 bpm	115 bpm
70	90–105 bpm	95–111 bpm	87–101 bpm	114–123 bpm	110 bpm

Day	Session
Mon	Rest or an easy walk
Tue	45 min Zone 2 — run, ride or brisk incline walk
Wed	Strength, 30–45 min
Thu	45 min Zone 2
Fri	Strength or rest
Sat	75–90 min long Zone 2
Sun	Intervals, e.g. 4 × 4 min hard with 3 min easy

Zone 2 heart rate calculator