Heart rate zones by age: a complete training chart

Heart rate zones by age translate an estimated maximum heart rate into five training intensities. The chart is useful for planning, but it should agree with your breathing, symptoms, medication, and real exercise response.

Use the heart-rate-zone calculator to generate exact rounded values for your age.

Why heart rate zones help

Zones give workouts a purpose. Easy sessions build volume and recovery, moderate work develops aerobic capacity, and harder zones add threshold and high-intensity stimulus. They also prevent every session from drifting into the same tiring middle effort.

No zone is magic. Health benefits come from a sustainable mix of movement, and an age formula cannot determine whether vigorous exercise is safe for a particular person.

How to calculate five heart rate zones

First estimate maximum heart rate:

Estimated maximum HR = 220 − age

Then multiply by each percentage band:

• Zone 1: 50-60%
• Zone 2: 60-70%
• Zone 3: 70-80%
• Zone 4: 80-90%
• Zone 5: 90-100%

Heart rate zones by age chart

Age	Zone 1	Zone 2	Zone 3	Zone 4	Zone 5
20	100-120	120-140	140-160	160-180	180-200
30	95-114	114-133	133-152	152-171	171-190
40	90-108	108-126	126-144	144-162	162-180
50	85-102	102-119	119-136	136-153	153-170
60	80-96	96-112	112-128	128-144	144-160
70	75-90	90-105	105-120	120-135	135-150

Values are beats per minute and rounded. Your wearable may display different boundaries because it uses another formula or a measured maximum.

Why 220 minus age can miss your real maximum

The formula estimates an average across a population. Individual maximum heart rates sit above and below that line. Two healthy 45-year-olds can have different true maximums even with similar fitness.

Maximum heart rate is influenced strongly by age and individual biology. Training may change how much work you can produce at a given heart rate without moving the true maximum very much. A fitter person is not required to have a higher maximum.

If the formula underestimates your maximum, the calculated zones may feel too easy and your watch may label ordinary work as near maximal. If it overestimates the maximum, the zones can push you harder than intended.

The Tanaka alternative

A second common estimate comes from Tanaka and colleagues:

Estimated maximum HR = 208 − (0.7 × age)

At age 45, 220 minus age gives 175 bpm. Tanaka gives 208 minus 31.5, or about 177. For many adults the two land a few beats apart, with Tanaka a little higher in older people and a little lower in younger ones. That gap is smaller than the swing you get from sleep, heat, caffeine, or a loose watch strap. Tanaka is another average fitted to study data, not a measurement of your heart. Use one formula, write down which, and don’t switch halfway through a training block or your zones will move without your fitness changing.

Do not test a maximum by sprinting without preparation. A measured value is most useful when it comes from an appropriate graded exercise test or a well-designed field test suited to your health and training history.

Heart-rate reserve: a more personal calculation

Heart-rate reserve uses resting heart rate as well as maximum:

Target HR = resting HR + intensity × (maximum HR − resting HR)

For a 40-year-old with an estimated maximum of 180 bpm and a resting heart rate of 60, the reserve is 120. At 60% intensity, the target is 60 plus 0.60 times 120, or 132 bpm. At 70%, it is 144 bpm.

Those values are higher than 60% to 70% of maximum alone, which gives 108 to 126 bpm. Both systems can be described as “Zone 2” by different apps. The label is meaningless unless the calculation method is shown.

Measure resting heart rate after several quiet minutes, ideally under similar conditions across multiple mornings. Do not use a single unusually low or high reading to rebuild all zones.

Perceived exertion and the talk test

Your breathing is a useful check on the formula. At moderate intensity, breathing and heart rate are clearly faster, but conversation in sentences remains possible. Vigorous activity makes full conversation difficult.

On a 0-to-10 effort scale, easy work might feel like 2 or 3, moderate work around 4 to 6, and hard work higher. These are personal sensations, so practice improves their usefulness.

If the watch calls a relaxed conversational walk Zone 4, check the setup and sensor. If the display says Zone 2 while you can speak only a few words, slow down and review the estimated maximum, medication, heat, and terrain.

The talk test is not a safety screen. Chest pain, faintness, an irregular pounding heartbeat, or unusual breathlessness calls for stopping and medical advice regardless of the displayed zone.

What each zone is good for

Zone 1 is useful for warm-ups, cool-downs, recovery sessions, and easy movement. It should feel deliberately light.

Zone 2 supports longer aerobic work with manageable fatigue. You can usually accumulate more time here than in the harder zones. It is often used for base training, but no special cellular switch occurs at the watch boundary.

Zone 3 is a steady middle effort. It can improve endurance, although doing every workout here may leave little room for either true recovery or high-quality hard work.

Zone 4 sits around hard threshold-style training in many five-zone systems. Sessions usually use controlled blocks with recovery. Zone 5 is reserved for short, very hard intervals and sport-specific work. Beginners do not need it to gain health benefits.

Names and boundaries vary. Some coaches use three zones; others use five or seven. Compare the effort description before comparing zone numbers from two programs.

How activity type changes heart rate

Running often produces a higher heart rate than cycling at a similar perceived effort because more muscle mass is involved and body position differs. Swimming adds water pressure, horizontal position, and cooling. Rowing, hiking, and strength circuits create their own responses.

Build sport-specific zones if precision matters. A cycling threshold should not automatically dictate running sessions. For general health, breathing and perceived effort may be enough to bridge activities.

Heart rate also drifts upward during a long steady session, especially in heat or dehydration, even when pace stays constant. Slowing slightly to keep the number fixed may be sensible on an easy day. On other days, the effort can stay steady while the number moves modestly.

Wrist sensors struggle with gripping, vibration, and abrupt intervals. A chest strap often tracks rapid changes better, but no device can decide whether symptoms are safe.

A simple week for a beginner

A new exerciser might start with three or four easy-to-moderate sessions of 20 to 30 minutes, depending on current capacity. Walking, cycling, swimming, or another joint-friendly activity can work. Add time before adding a great deal of intensity.

Include muscle-strengthening activity on two days when appropriate. Those sessions do not need to fit neatly into aerobic heart-rate zones. Heart rate can rise during a set, but it does not describe muscular load or technique.

After several consistent weeks, one session can include brief faster segments separated by easy recovery. The faster work should stop well before form breaks down. A hard session is a small part of the week, not a test of character.

Rest and easy days are part of the program. If sleep, mood, soreness, or performance worsens, reduce training load before adding more zones.

Set up your wearable before trusting it

Check the age, resting heart rate, maximum heart rate, and zone method saved in the app. A birthday entered incorrectly or a default maximum can shift every boundary.

Confirm whether the device uses percent of maximum, heart-rate reserve, or threshold zones. If you update the maximum, decide whether that value came from a credible test or a one-second sensor spike.

Wear the sensor snugly according to the manufacturer. Cold skin, tattoos, arm movement, and loose contact can create errors. Compare a suspicious number with a manual pulse or chest strap when safe to do so.

Keep firmware and settings changes in your training notes. If the app changes its zone algorithm, the same workout may receive different labels without any change in fitness.

How each zone should feel

Zone 1 feels very easy. Zone 2 allows full-sentence conversation. Zone 3 makes speech shorter but controlled. Zone 4 is hard and sustainable for limited intervals. Zone 5 is near-maximal and used briefly.

Zone 2 gets the most attention online. In practice it’s the effort where you can still talk in full sentences, and two apps can disagree on its numbers because one uses percent of maximum and the other uses heart-rate reserve (see the example above). If the watch and the talk test disagree, trust the talk test and check the settings. There’s no fixed quota: a beginner might start with 20 minutes three times a week and add five minutes to one session when recovery is good. Splitting it into a morning walk and an evening walk counts too.

When the age chart needs adjustment

Beta blockers and some rhythm medicines lower exercise heart rate. Heat, altitude, dehydration, illness, and fatigue can raise it at the same pace. Running and cycling can produce different heart-rate responses. Wrist sensors may lag during intervals.

If you know your measured maximum, update the zones with that value. If your goal is clinical rehabilitation or performance precision, use professionally measured thresholds.

How to use the zones in a week

Most recreational exercise can stay easy to moderate, with harder work added gradually. Your weekly mix depends on training history, sport, recovery, and health. Do not jump into Zone 5 because a watch suggests it.

After a repeatable session, track heart-rate recovery as a separate trend.

General adult guidance calls for at least 150 minutes of moderate activity or 75 minutes of vigorous activity per week, or a mixture, plus strengthening on two days. The minutes matter more than whether your device calls them Zone 2 or Zone 3.

What the “fat-burning zone” misses

At easier efforts, fat supplies a bigger share of the energy you burn. At harder efforts, carbohydrate takes over because it can be used faster. That’s where the idea of a fat-burning zone comes from.

The catch is that a share isn’t a total. Sixty percent of a small calorie burn can be less fat than forty percent of a bigger one. And the workout is only part of the day: food, recovery, and how much you move afterwards all feed into energy balance. A hard session can leave you tired and less active later, or hungrier. An easy walk adds movement without much fatigue. People respond differently.

So intensity still matters, for fitness, time, enjoyment, and injury risk. It just isn’t a heart-rate code that gets around energy balance. For fat loss, a pace you’ll repeat most weeks, some strength training, and the food side of the equation do more than hitting one zone.

Use zones as a flexible map

Zones organize effort; they do not define your worth or health. Use the chart as a starting map and let real-world response refine it.