Japanese interval walking
Three minutes fast, three minutes slow, five times. The method from Shinshu University that turns a 30-minute walk into proper training — with a timer to follow along.
The protocol
- Fast for 3 minutes — about 70% effort. Breathing hard, short sentences only.
- Slow for 3 minutes — about 40% effort. Easy, relaxed.
- Repeat for at least five rounds (30 minutes).
- Four or more days a week.
The timer below runs the full 10 intervals; stop after 5 rounds if you're starting out.
About 70% of your max effort: breathing hard, but you could say a short sentence.
What happens during a session
0–3 min · Fast
Heart rate climbs toward about 70% of peak. Your muscles work hard enough to trigger the strength and aerobic adaptations the method is known for.
Shape only — not measured data.
What the research found
Nemoto, Gen-no, Masuki, Okazaki and Nose (Mayo Clinic Proceedings, 2007) randomised 246 adults with an average age of about 63 into no walking, continuous moderate walking, or interval walking for five months. Interval walkers improved knee-extension strength, peak aerobic capacity and systolic blood pressure more than the continuous group, despite walking a similar amount.
It works because it's easier to sustain hard effort in short bursts. You can use the workout generator to build shorter or longer interval sessions, or check your fast-block pace with the pace calculator.
Session timeline
| Start | Segment | Minutes | Effort | Target pace |
|---|---|---|---|---|
| 0:00 | Fast 1 | 3 | Fast | 14:38/mi |
| 3:00 | Slow 1 | 3 | Easy | 23:05/mi |
| 6:00 | Fast 2 | 3 | Fast | 14:38/mi |
| 9:00 | Slow 2 | 3 | Easy | 23:05/mi |
| 12:00 | Fast 3 | 3 | Fast | 14:38/mi |
| 15:00 | Slow 3 | 3 | Easy | 23:05/mi |
| 18:00 | Fast 4 | 3 | Fast | 14:38/mi |
| 21:00 | Slow 4 | 3 | Easy | 23:05/mi |
| 24:00 | Fast 5 | 3 | Fast | 14:38/mi |
| 27:00 | Slow 5 | 3 | Easy | 23:05/mi |
First five rounds shown; the timer continues to ten.
Questions walkers ask
What is Japanese interval walking?
A method developed by Hiroshi Nose and Shizue Masuki at Shinshu University: alternate 3 minutes of fast walking (about 70% of your peak aerobic capacity) with 3 minutes of slow walking (about 40%), for five sets or more — 30 minutes in total — at least four days a week.
Does Japanese interval walking work?
In their 2007 study in Mayo Clinic Proceedings, middle-aged and older adults doing interval walking for five months improved thigh strength, aerobic capacity and blood pressure more than a group walking continuously at moderate pace. Later studies from the same group reported similar results.
How fast is the fast part?
Fast enough that you are breathing hard and can only speak in short phrases — around 6 or 7 out of 10 on an effort scale. It is not a sprint. The slow part should feel easy, around 3 out of 10.
Can beginners do it?
Yes; that is who it was designed for. The original participants averaged over 60 years old. If 30 minutes is too long at first, start with three sets (18 minutes) and add one set a week.
Is it the same as the Japanese "walking" trend on social media?
Yes — "Japanese walking" on TikTok and Instagram is this 3-minutes-fast, 3-minutes-slow protocol.