Japanese Walking: the interval method, explained properly
Japanese walking, sometimes called interval walking training or IWT, is a simple idea. Instead of walking at one steady pace, you alternate between three minutes of brisk walking and three minutes of slow walking, five times over. About thirty minutes, done.
It's been all over social media lately, usually stripped of context. This page covers what the method actually is, where it comes from, how to do it correctly, and honest answers to the questions people ask most. We also make an iPhone and Apple Watch app that times the intervals for you. More on that further down, but everything above it stands on its own whether you use the app or not.
The routine
- 1 minute: easy warm-up walk
- 3 minutes: brisk walking (you can talk, but not comfortably)
- 3 minutes: slow walking (fully recover, easy pace)
- Repeat the brisk/slow pair five times in total
That's roughly 31 minutes door to door. The original research asked participants to do this four or more days a week.
"Brisk" doesn't mean jogging. A good test: during the fast phases you should be able to say a short sentence but not hold a relaxed conversation. During the slow phases you should recover completely. That recovery is the point, not a failure.
Where it comes from
The method was developed by researchers at Shinshu University in Matsumoto, Japan, led by Professor Hiroshi Nose's group. In a five-month trial published in 2007, middle-aged and older adults were assigned either steady moderate-pace walking or interval walking: repeated sets of three minutes fast, three minutes slow.
The interval walkers came out ahead. Compared with the steady-pace group, they showed greater improvements in aerobic fitness, meaningful gains in thigh muscle strength, and reductions in blood pressure. The steady walkers, despite putting in similar time, improved far less on these measures.
Two honest caveats, because most trend coverage skips them. First, this was one study population (Japanese adults, mostly in their fifties and sixties), and while later work from the same group has extended the findings, it isn't magic; it's structured moderate-intensity exercise, which was always going to beat a gentle stroll. Second, the benefits in the study came from months of consistency, not a fortnight of enthusiasm. The method works because it's sustainable, not because three minutes of fast walking does something mystical.
Why people stick with it
Compared with the vague target of 10,000 steps, Japanese walking has three practical advantages.
It's time-boxed. Thirty minutes with a defined finish beats an all-day step count you're never quite done with. For busy people, "one session, complete" is easier to protect than "keep moving all day".
It's genuinely low-impact. No running, no jumping, no gym. The slow phases make the fast phases achievable for beginners, people returning after a break, and anyone protecting their knees and hips.
Effort is built in. Step counts measure volume, not intensity: 10,000 shuffled steps count the same as 10,000 purposeful ones. The research suggests intensity is what drives fitness gains, and the interval structure guarantees you spend fifteen minutes of each session actually working.
How to start
- Pick a flat-ish route or just walk out and back. Nothing special needed, normal comfortable shoes are fine.
- Warm up for a minute at an easy pace.
- Walk briskly for three minutes. Aim for "short sentences only" breathing.
- Slow right down for three minutes. Let your breathing settle fully.
- Repeat until you've done five fast phases. Done.
Timing the phases in your head doesn't work. Three minutes is surprisingly hard to judge, and checking a stopwatch every thirty seconds ruins the walk. Use any interval timer, or the app below, which taps you on the wrist when it's time to switch so you can leave your phone in your pocket.
If five rounds feels like too much at first, do three. The structure matters more than the volume in your first weeks; build up to five rounds before you worry about walking faster.
There's a printable schedule and tracker here.
A free timer for iPhone and Apple Watch
We built Japanese Walking: Step Counter because we wanted exactly this and couldn't find it: a timer that guides the full routine with no subscription wall in front of the basics.
The free version is the complete method, not a teaser:
- The full guided interval walk, with voice guidance and countdowns for every phase
- A complete Apple Watch app: real-time heart rate, haptic taps at each phase change, no phone needed on the walk
- Steps, distance, calories and heart rate synced with Apple Health
- Live countdown on your Lock Screen and in the Dynamic Island
- A streak widget and your last seven days of walks
A full, free Apple Watch app is rare in this category. Most walking apps put the Watch behind a subscription. Ours isn't, and won't be.
There's an optional premium tier for people who get deeper into it: custom intervals, full history and trend charts, a brisk-vs-slow comparison that shows your average heart rate and pace in fast phases versus slow ones (satisfying proof the intervals are doing something), fitness analytics, a 150-day challenge, and hourly strength-break reminders. Premium is a monthly or annual auto-renewing subscription, or a one-off lifetime purchase. You never need it to do the walk.
No account, no email sign-up, no guilt-trip notifications. If you miss a day, the app doesn't nag you about it.
Frequently asked questions
How many days a week should I do Japanese walking?
The original study asked participants for four or more days a week. If you're starting from little or no exercise, three days a week is a sensible beginning. Consistency over months matters far more than any single week.
Is Japanese walking better than 10,000 steps a day?
They measure different things. Step counts track total daily movement; Japanese walking is a structured session with guaranteed intensity. The 2007 research found interval walkers improved fitness, leg strength and blood pressure more than steady-pace walkers over five months. Ideally you'd move plenty and do a few interval sessions. They're complementary, not rivals.
Can I do it on a treadmill?
Yes. Alternate the speed between a brisk setting and an easy one every three minutes. Outdoors is nicer, but the protocol doesn't care.
Do I need to jog during the fast phases?
No, it's walking throughout. Brisk means purposeful walking where conversation becomes difficult, not running. If you can chat comfortably, push a little; if you're gasping, ease off.
Is it suitable if I'm unfit, overweight, or returning after a long break?
It was designed for and tested on middle-aged and older adults, so it's one of the more beginner-appropriate structured routines around. Start with fewer rounds and a gentler "brisk" pace. As with any new exercise, if you have a heart condition, joint problems or other health concerns, check with your GP first.
Do I need an Apple Watch to use the app?
No. The iPhone app guides the full routine on its own with voice guidance and a Lock Screen countdown. The Watch app adds wrist taps and live heart rate if you have one.
How long until I notice results?
In the research, measurable changes in fitness and blood pressure showed up over months of consistent training. Subjectively, most people find the sessions feel easier within two to three weeks. Treat it as a habit, not a programme with an end date.