Japanese Walking: The 3-Minute Interval Method and What the Research Shows

What is Japanese walking?

Japanese walking is the social-media name for interval walking training (IWT), a method developed and tested by researchers at the Shinshu University Graduate School of Medicine in Matsumoto, Japan. Instead of walking at one steady pace, you alternate 3 minutes of fast walking with 3 minutes of slow walking. It needs no equipment, no gym and no running, which is much of its appeal.

The key paper is Nemoto and colleagues' 2007 trial in Mayo Clinic Proceedings, which randomly assigned 246 people with an average age of 63 to no training, steady walking or interval walking for 5 months. The same group reported results from 679 people in 2019 (Masuki et al., also in Mayo Clinic Proceedings), and a 2013 Danish trial in Diabetes Care (Karstoft et al.) tested the method in people with type 2 diabetes. This guide sets out what those papers did, what they found and what they did not test. For step targets and a general walking plan, see our guide to walking for weight loss.

How do you do Japanese walking: 3 minutes fast, 3 minutes slow?

In the Shinshu trials, one session is 5 or more sets of 3 minutes fast walking followed by 3 minutes slow walking, so at least 30 minutes, on 4 or more days a week. Pace is set by effort, not a fixed speed: the fast phase is above 70% of each person's peak aerobic capacity for walking and the slow phase about 40%. Peak capacity was measured before the program, and an accelerometer recorded each session.

Look at the dose. Five fast sets of 3 minutes on 4 days is 60 minutes of fast walking a week (our arithmetic). In the 2019 analysis of 679 people, gains in fitness rose with fast-walking time up to about 50 minutes a week and then levelled off, while slow or total walking time did not predict improvement. The fast minutes are the part that counts.

What did the Japanese walking studies find?

The measured Japanese walking benefits are about fitness, leg strength and cardiovascular risk markers, measured against steady walking. The figures below are each paper's own averages.

Nemoto's team concluded, carefully, that high-intensity interval walking “may protect against age-associated increases in blood pressure and decreases in thigh muscle strength and peak aerobic capacity.” That describes averages in a trial, not a promise for one person, and it is never a reason to change a blood-pressure medicine. If you have high blood pressure, our guide to blood pressure exercise precautions lists what to settle with your doctor first. With diabetes, read exercise for type 2 diabetes.

What the studies did not test

• Fat loss as the main goal. The Shinshu trials were designed around strength, aerobic capacity and blood pressure, and their abstracts report no fat-loss result. Only the small Copenhagen trial measured body fat, in 12 interval walkers with type 2 diabetes walking about an hour a session.
• Young, fit adults. The main trials enrolled middle-aged and older people or people with diabetes. Results in a fit 30-year-old may differ.
• Sticking with it for years. A 2024 review in Applied Physiology, Nutrition, and Metabolism, written with the Shinshu and Copenhagen researchers, says adherence is high in short-term studies but that “ensuring long-term adherence remains a challenge, particularly in populations with chronic diseases and/or overweight/obesity.”
• Everyone finishing. In the 2007 trial, 42 of the 87 people in the interval group met the walking targets, by our count of the abstract's figures. In the 2013 trial, 2 of the first 24 people dropped out, one with a knee injury and one with new asthma symptoms. Both trials tracked every session with an accelerometer, and the Copenhagen team gave feedback every two weeks, which a walk on your own doesn't have.

Does Japanese walking burn more calories than normal walking?

No, not per session. A 30-minute Japanese walk burns about the same as 30 minutes of steady walking at a moderate pace, and less than 30 minutes of steady brisk walking, because half the time is slow. The 2024 Adult Compendium of Physical Activities gives MET values for walking speeds, and one MET is approximately 1 kcal per kg of body weight per hour, so the cost is easy to estimate.

To scale for your weight, multiply each MET by your weight in kg and by the hours walked. The very brisk version comes to about 114 kcal for a 55 kg person and about 187 kcal for a 90 kg person (our arithmetic). So the case for Japanese walking is not a bigger calorie number. It is that the fast minutes pushed fitness and leg strength further than steady walking did in the trials. To see what your whole day adds up to, use the TDEE calculator.

Is Japanese walking good for weight loss?

Japanese walking for weight loss works the way any walking does: it adds to the energy you use while your food keeps you in a calorie deficit. The one trial that measured it, Karstoft 2013, found interval walkers lost 4.3 kg of body weight and 3.1 kg of fat mass over 4 months, while energy-matched steady walkers did not. That was 12 people with type 2 diabetes, and the trial's walkers averaged about 59 minutes a session on about 4.5 days a week, roughly 265 minutes a week against 120 for the standard 30-minute, 4-day routine (our arithmetic).

The authors could not fully explain the difference. They speculated that extra oxygen use after the fast intervals might play a part, and wrote that studies with strictly controlled food intake would be needed to prove it. Treat it as an encouraging small result, not proof that intervals melt fat. Pair the walks with a moderate deficit (the calorie deficit calculator gives a starting number) and strength training twice a week; our fat loss page explains how we combine them.

How do you know you are walking fast enough without a gadget?

Judge effort, as the trials did, rather than copying a speed from a video. The US Centers for Disease Control and Prevention give two simple checks. In the talk test, a person doing moderate activity “can talk, but not sing,” while during vigorous activity they “cannot say more than a few words without pausing for a breath.” On a 0 to 10 effort scale, moderate effort is 5 or 6 and vigorous begins at 7 or 8.

• Fast 3 minutes: you can speak in short phrases but wouldn't want to hold a conversation. Our coaching rule of thumb is about 6 to 7 out of 10. For an older or less fit walker, that may look like an ordinary brisk walk.
• Slow 3 minutes: easy enough to chat in full sentences, about 3 to 4 out of 10 by our rule of thumb. Keep moving so the next fast set starts from a walk.
• Too hard: if you can only gasp single words, or you have to jog to get there, ease off. The trials used walking, not running.

A phone timer that beeps every 3 minutes is all the equipment you need. If the same effort starts to carry you further along the same route over a few weeks, that is a sign your fitness is improving.

A 6-week Japanese walking plan for beginners

This plan is ours, not a protocol from the trials. It builds up gradually to the published dose of 5 sets on 4 days a week. Start each session with 3–5 minutes of easy walking and end with the same.

1. 1

   Week 1: 3 sets, 3 days

   Three rounds of 3 minutes fast and 3 minutes slow, 18 minutes in all. Keep the fast phase at a brisk walk where you can still talk in sentences, with a rest day between sessions.

2. 2

   Week 2: 4 sets, 3 days

   24 minutes. Push the fast phase until talking takes some effort.

3. 3

   Week 3: 5 sets, 3 days

   The full 30-minute session, with the fast phase at about 6 out of 10. Add two short strength sessions, such as squats to a chair and wall push-ups.

4. 4

   Week 4: 5 sets, 4 days

   The dose the Shinshu trials prescribed. Spread the four days across the week, for example Monday, Wednesday, Friday and Sunday.

5. 5

   Week 5: 5 sets, 4 days, harder fast sets

   Aim for 6 to 7 out of 10 in every fast set. If set five is much slower than set one, start the first set a little easier.

6. 6

   Week 6: review and keep going

   Walk your week 1 route and compare: does your fast pace cover more ground now? Stay at 4 days of 5 sets, or add a sixth set on one day. Extra slow walking added little to fitness gains in the 2019 data.

Japanese walking in Indian heat and smog

Fast intervals raise body heat and breathing more than a stroll, so plan around the weather. The National Centre for Disease Control's 2026 heatwave advisory says to avoid the sun, especially between 12 noon and 3 pm, to avoid strenuous activity outside in the afternoon, and to limit outdoor activity to cooler times such as morning and evening. For people arriving from cooler places, it says acclimatisation comes from increasing activity in the heat gradually over 10–15 days. Walk early, carry water and cut the fast sets on very hot days.

For air, the Central Pollution Control Board's National Air Quality Index has six categories: Good (0–50), Satisfactory (51–100), Moderately polluted (101–200), Poor (201–300), Very poor (301–400) and Severe (401–500). Fast sets mean deeper breathing, so on Poor or worse days we move the session indoors. Our walking for weight loss guide has a band-by-band table, the indoor walking workout at home gives routines for those days, and best time to work out compares morning and evening.

Who Japanese walking suits, and where coaching fits

Japanese walking suits people who already walk and want more from the same half hour, beginners who can't or don't want to run, and older adults, the group the trials actually studied. It suits less well anyone who needs a large calorie burn in little time, or whose knees, hips or balance make fast walking uncomfortable; get pain checked before you push the pace.

MakeMyFitness is a live online personal training service in India, with 1:1 coaching on video at ₹799 a session at your gym or ₹899 at home, and it suits walkers who want someone to set their effort targets, add the strength work and adjust the plan for heat and smog. Our coaches, led by Kumar Abhishek, are fitness coaches, not doctors, dietitians or physiotherapists. Rehab & Recovery is exercise coaching after a clinician has cleared you, not treatment; our medical disclaimer explains the limits.

See Personal Home Training for how sessions work. If you'd rather train with others, group classes are ₹499 a person a session, or ₹4,040 for a 4-week plan of 12.