What a New Step-Cadence Study Means for Walking at 2, 3 or 4 mph

On September 8, 2026, the British Journal of Sports Medicine published online an observational UK Biobank study of 64,743 adults who wore wrist step trackers. People with a higher cadence (steps per minute) in their 30 busiest minutes of the day, not necessarily in a row, had a lower risk of death, even in the group taking fewer than 5,000 steps a day; the lowest risk of any group was at about 100 steps a minute among people taking 7,500–10,000 steps a day. For readers, this means step rate is worth watching alongside step count, and the cadence involved is within reach: in treadmill testing of adults aged 21–40, 100 steps a minute matched roughly 2.0–2.5 mph. Because the study only observed people, it cannot show that walking faster would lower anyone's own risk.

Measured against that marker, about 2 mph (1.9 mph, 3 km/h) is a light stroll for most adults under 60, about 3 mph (3.1 mph, 5 km/h) is moderate exercise that counts toward the federal 150-minute weekly target, and about 4 mph (4.3 mph, 7 km/h) sits near the moderate-vigorous line and a little below the average speed at which young adults in one treadmill study switched to running.

Key takeaways

The 2024 Adult Compendium of Physical Activities rates walking under 2.0 mph at 2.3 METs (code 17151), 2.8–3.4 mph at 3.8 METs (17190) and 4.0–4.4 mph at 5.5 METs (17220); federal guidelines call 3.0–5.9 METs moderate.
For a 70 kg (154 lb) adult, 30 minutes at the three speeds uses about 85, 140 and 202 kcal, but per mile the totals are almost the same, about 90–93 kcal.
Lab cadences for adults aged 21–40 were about 96 steps a minute at 2.0 mph, 114 at 3.0 mph and 129 at 4.0 mph; 100 steps a minute is the usual marker for moderate intensity.
The 2026 UK Biobank study (step cadence), a 2018 pooled analysis of 11 British cohorts (self-rated pace) and a 2024 diabetes meta-analysis all associate faster stepping or walking with lower risk, but all are observational and cannot show that speeding up lowers risk.
In a 1993 treadmill study of 20 young adults, the average switch from walking to running came at about 4.6 mph (7.4 km/h), so 4.3 mph is close to the top of the walking range for that group.

What it means for you

Inactive adults starting out: a 1.9 mph (3 km/h) stroll is light activity for most adults under 60, but federal guidance tells inactive people to "start low and go slow." Building toward about 100 steps a minute moves walking into the moderate range (see the speed table and the closing checklist).
Regular walkers: 3.1 mph (5 km/h) counts as moderate-intensity activity. Speeding up to 4.3 mph (7 km/h) raises the energy cost per minute by about 45%, but by Compendium values it is still moderate, so minutes count one for one unless the talk test says otherwise for you.
Adults 60 and older: a separate Older Adult Compendium shows the same speed takes relatively more effort, so a 1.9 mph walk can sit right at the moderate line. The federal guidelines' older-adult chapter, which covers people 65 and older, also asks them to judge effort against their own fitness and to add balance training.
People with heart or lung conditions, or on medicines such as beta-blockers: federal guidelines say chronic conditions should be managed under a health care provider's care, and heart-rate targets can mislead on beta-blockers. The safety section covers the warning signs and alternatives to heart-rate zones.

The three speeds side by side

A MET (metabolic equivalent of task) is a multiple of resting energy use: 1 MET is about the energy of sitting quietly, defined as 3.5 milliliters of oxygen per kilogram of body weight per minute. The Physical Activity Guidelines for Americans, 2nd edition classify 1.6–2.9 METs as light, 3.0–5.9 as moderate and 6.0 or more as vigorous, and recommend 150–300 minutes of moderate activity a week for adults. The CDC's intensity guide lists walking briskly at 2.5 mph or faster as moderate, which is about 4.0 km/h.

The MET values below come from the 2024 Adult Compendium walking codes (level, firm surface). The 2024 update covers adults aged 19–59 and replaced estimated values with measured ones where possible. Cadence figures are means from the CADENCE-Adults treadmill study of 76 adults aged 21–40, which found 100 steps a minute marks moderate intensity and 130 marks vigorous. Testing stopped when a participant chose to run, passed 75% of age-predicted maximum heart rate or rated effort above 13 on the Borg scale, so the 4.0 and 4.5 mph means come from only 62 and 34 people.

Speed	Compendium code and MET	Federal intensity category	Lab cadence, nearest tested speeds	Time per mile
1.9 mph (3 km/h)	17151, "less than 2.0 mph, strolling, very slow": 2.3 METs	Light; below the CDC's 2.5 mph brisk threshold	84 steps/min at 1.5 mph; 96 at 2.0 mph	About 32 minutes
3.1 mph (5 km/h)	17190, "2.8 to 3.4 mph, moderate pace": 3.8 METs	Moderate	114 steps/min at 3.0 mph; 122 at 3.5 mph	About 19 minutes
4.3 mph (7 km/h)	17220, "4.0 to 4.4 mph (6.4 to 7.1 km/h), very brisk pace": 5.5 METs	Moderate, near the 6.0 MET vigorous line	129 steps/min at 4.0 mph; 140 at 4.5 mph	About 14 minutes

Why 4.3 mph is a borderline case

Two credible sources disagree slightly at this speed. The Compendium puts 4.0–4.4 mph at 5.5 METs, which is moderate. In the CADENCE-Adults lab group, walking at 4.0 mph already averaged 6.2 METs, which is vigorous, at 129 steps a minute, just under the 130-step vigorous marker. The spread between people was wide (a standard deviation of 0.8 METs at that speed), so the talk test is the practical tiebreaker for any one person.

The guidelines' rule of thumb: during moderate activity a person can talk but not sing, and during vigorous activity they cannot say more than a few words without pausing for breath. On a 0–10 effort scale, moderate is a 5 or 6 and vigorous starts at 7 or 8. This is relative intensity, so the same 3.1 mph walk can be moderate for one person and vigorous for a less fit one.

Where walking turns into running

In a 1993 treadmill study of 20 young adults, the average preferred switch from walking to running came at 2.06 meters per second, about 7.4 km/h (4.6 mph). Running would have been the more economical gait only at a higher speed, 2.24 meters per second (about 8.1 km/h, or 5.0 mph). At the switch speed, people rated walking as harder than running (13.5 versus 10.0 on the Borg effort scale), which suggests the switch is driven by how walking feels rather than by energy savings. Treadmill results like these come from small groups of young adults, so an individual's switch speed can differ.

Energy use at each speed

A standard way to turn METs into calories uses the 3.5 mL/kg/min definition of 1 MET:

kcal per minute = MET × 3.5 × body weight (kg) ÷ 200

MET              = Compendium value for the activity
3.5              = oxygen use at rest, mL per kg per minute
body weight (kg) = pounds ÷ 2.2046
÷ 200            = converts milliliters of oxygen per minute into kilocalories

Illustrative example: a 70 kg (154 lb) adult walking 30 minutes on level ground.

Speed	kcal per minute	30 minutes	Distance in 30 minutes	kcal per mile, total	kcal per mile above resting
1.9 mph (3 km/h)	2.3 × 3.5 × 70 ÷ 200 = 2.82	About 85	0.93 miles (1.5 km)	About 91	About 51
3.1 mph (5 km/h)	3.8 × 3.5 × 70 ÷ 200 = 4.66	About 140	1.55 miles (2.5 km)	About 90	About 66
4.3 mph (7 km/h)	5.5 × 3.5 × 70 ÷ 200 = 6.74	About 202	2.17 miles (3.5 km)	About 93	About 76

Per minute, the fastest pace uses about 2.4 times the energy of the slowest. Per mile, the total is almost flat at 90–93 kcal, because a slow mile takes longer and resting metabolism keeps running the whole time. Counting only the energy above resting (MET minus 1), a mile at 4.3 mph costs about 76 kcal against 51 at 1.9 mph. By these Compendium values, a faster pace mainly saves time; it adds about 25 kcal of extra energy per mile.

The Compendium itself defines 1 MET as 1.0 kcal per kilogram per hour, which gives results about 5% lower (about 80, 133 and 193 kcal for the same three 30-minute walks). Both are estimates for an average adult, not measurements.

How the numbers shift after 60

The Older Adult Compendium uses a lower resting baseline of 2.7 mL/kg/min for people 60 and older. Its walking values are 4.0 for 1.0–1.9 mph (code 1715260), 5.3 for 2.8–3.2 mph (1719060) and 7.3 for 4.0–4.2 mph (1722060); it lists no code for 4.3 mph. Converted to the standard 3.5 baseline (multiplying by 2.7 and dividing by 3.5), those come to about 3.1, 4.1 and 5.6 METs, so a 1.9 mph (3 km/h) walk that is light for a 40-year-old sits right at the 3.0 MET moderate line for an older adult. That result is borderline, because the next code, 2.0 mph (1715360), is listed at 3.8 MET60+, which converts to 2.9, just below the line.

The Compendium's guidance for using these values converts them with 0.810 kcal per kilogram per hour, which for a 70 kg adult gives about 3.8, 5.0 and 6.9 kcal a minute.

Cadence thresholds hold up with age: a CADENCE-Adults study of 98 people aged 61–85 again tied 100 steps a minute to 3 METs, with 110 and 120 steps a minute tied to 4 and 5 METs. Only 6 of the 98 reached 6 METs, so that study set no vigorous cadence for older adults.

What studies link to faster pace

None of the studies below is a randomized trial. They follow groups of people over time and compare outcomes by walking speed or cadence, so they show associations, not cause and effect. Illness can slow a person's walk before it is diagnosed, which can make slow walking look harmful when it is partly a symptom; the 2018 analysis below excluded early deaths for this reason.

2026, step cadence and death (prospective cohort): in the BJSM UK Biobank study (mean age 61.5, 1,697 deaths), peak cadence was the average steps per minute in the day's 30 highest-cadence minutes, which did not have to be consecutive, and the comparison group combined fewer than 5,000 steps a day with a peak cadence at the 5th percentile. People at 7,500–10,000 steps with a peak cadence of about 100 steps a minute had a 43% lower risk of death (hazard ratio 0.57, 95% CI 0.47–0.69); in that group the pattern was U-shaped, so risk did not keep falling at higher cadences. Among people under 5,000 steps a day, a peak cadence of 80 steps a minute was linked to 28% lower risk (0.72, 0.54–0.97), while the estimate at 90 steps a minute (0.64) had a confidence interval (0.32–1.32) that included no difference. Cardiovascular deaths followed similar patterns.
2018, self-rated pace (pooled cohorts): a pooled analysis of 50,225 walkers in 11 British surveys found that, compared with a slow pace, an average pace was linked to 20% lower all-cause mortality and a brisk or fast pace to 24% lower. Cardiovascular deaths were 24% and 21% lower. No link was found with cancer deaths. The authors left out deaths in the first two years to reduce the effect of existing illness.
2024, type 2 diabetes (meta-analysis of cohorts): a meta-analysis of 10 cohort studies compared walking speeds against easy walking under 3.2 km/h (2.0 mph). Fairly brisk walking at 4.8–6.4 km/h (3.0–4.0 mph) was linked to a 24% lower risk (relative risk 0.76) and brisk walking above 6.4 km/h to a 39% lower risk (0.61). In absolute terms, that is about 1.4 and 2.2 fewer cases per 100 people. Risk fell significantly from about 4 km/h upward. The authors rated the evidence low to moderate certainty, mostly from studies at high risk of bias.
2011, gait speed in people 65 and older (pooled cohorts): across 9 cohorts with 34,485 people, each 0.1 meter per second faster usual gait speed (about 0.36 km/h, or 0.22 mph) was linked to a 12% lower risk of death (hazard ratio 0.88). Average gait speed was 0.92 m/s, about 3.3 km/h. The authors presented gait speed as a way to estimate survival, not as a treatment.

Mapped onto the three speeds, 1.9 mph (3 km/h) falls in the "easy" reference group of the diabetes analysis, 3.1 mph (5 km/h) in the "fairly brisk" band and 4.3 mph (7 km/h) in the "brisk" band. Whether deliberately speeding up lowers these risks has not been tested in long-term trials.

Safety, heat and medications

The federal guidelines say that people without diagnosed chronic conditions such as diabetes, heart disease or osteoarthritis, and without symptoms such as chest pain or pressure, dizziness or joint pain, most likely do not need to consult a health care provider before becoming active. They state that inactive people who progress gradually to moderate activity have no known risk of sudden cardiac events and a very low risk of injury. Anyone who develops new symptoms while increasing activity should see a health care provider, and people with chronic conditions or symptoms should be under a provider's regular care.

Heart-rate zones on beta-blockers: in a small randomized crossover trial of 10 healthy men, bisoprolol lowered heart rate by about 15–22 beats a minute at rest and during exercise without changing oxygen use or perceived effort, and the authors concluded that percentage-of-max heart rate targets are of limited accuracy on beta-blockers. They suggested ratings of perceived exertion as one substitute.
Heat: the guidelines suggest exercising in the cool of early morning, moving indoors, lowering intensity, resting in shade and drinking enough fluids in hot, humid weather. Dropping from 4.3 to 3.1 mph on a hot day is one way to apply that.
Falls: according to the CDC, more than one in four people 65 and older fall each year. The federal guidelines advise choosing safe environments and making sensible choices about when and where to be active.

This article is general education about walking intensity and is not individual medical advice.

Frequently asked questions

What is a normal walking speed for my age?

A meta-analysis of 41 studies covering 23,111 healthy adults found average normal-pace walking speeds ranging from 1.43 meters per second for men aged 40–49, about 3.2 mph (5.2 km/h), to 0.94 meters per second for women aged 80–99, about 2.1 mph (3.4 km/h). These were measured over short courses of 3–30 meters, so they do not match a long outdoor walk exactly.

Do short walks count toward the 150-minute weekly target?

Yes. The 2018 guidelines dropped the earlier rule that activity had to come in bouts of at least 10 minutes, because evidence showed bouts of any length add to the overall benefit. A brisk five-minute walk between meetings counts as long as it reaches moderate intensity.

Is pace more important than total walking time?

The evidence suggests pace adds information on top of volume rather than replacing it. In the 2024 diabetes meta-analysis, results did not differ credibly between studies that adjusted for total physical activity or daily walking time and those that did not. In the 2018 British pooled analysis, the pace associations were clearest among people over 50, those not meeting activity recommendations and those doing no vigorous exercise.

Why do calorie estimates vary so much?

The MET system assumes everyone burns 3.5 mL of oxygen per kilogram per minute at rest, a figure originally based on one 70 kg, 40-year-old man. A 2005 study of 769 adults (mostly women, some with obesity) measured an average resting rate of 2.6 mL/kg/min, meaning the standard value overestimated resting oxygen use by about 35% on average. Body composition explained most of the person-to-person difference, so any MET-based figure is a rough guide.

Does walking slowly help prevent falls?

Not on its own, according to the federal guidelines, which note that low-intensity walking alone does not seem to reduce fall-related injuries and fractures. Programs that did reduce falls combined several elements, usually balance training and muscle strengthening, sometimes with moderate activity such as walking.

How to find your pace this week

Count your cadence. On a normal walk, count steps for 60 seconds, or for 15 seconds and multiply by four. About 100 steps a minute is the usual moderate marker; a worked example in the guidelines shows a 10-minute moderate walk adding about 1,000 steps.
Time a known mile. About 32 minutes per mile is 1.9 mph (3 km/h), about 19 minutes is 3.1 mph (5 km/h) and about 14 minutes is 4.3 mph (7 km/h). A 24-minute mile is the CDC's 2.5 mph brisk threshold.
Run the talk test. Being able to talk but not sing means moderate; being able to say only a few words means vigorous for you, whatever the speed.
Add speed in short blocks. If 3.1 mph is comfortable, try a few minutes faster inside the usual walk, in line with the guidelines' advice to increase activity gradually.
Check the weekly total. At 3.1 mph (5 km/h), 150 minutes covers about 7.8 miles (12.5 km), for example 30 minutes on five days.