IWT: Japanese Interval Walking

Walk smarter, not longer. Japanese Interval Walking Training (IWT) is the science-backed 3-minute fast / 3-minute slow walking method developed at Shinshu University — shown in published research to boost fitness more than 10,000 steps a day, in a third of the time. This is the only Japanese walking app that combines a precision interval timer, camera-based heart rate estimation, automatic step tracking, an AI coach, and smartwatch sync — all in one place. ⏱ SCIENCE-BACKED INTERVAL TIMER - Guided 3-min fast / 3-min slow cycles (3, 5, or 7 rounds) - Voice coaching announces every transition, even with music playing - Cadence metronome keeps your pace on target (125 Fast / 85 Slow SPM) - Runs in the background — lock your phone and keep walking ❤️ HEART RATE ESTIMATE, NO WEARABLE NEEDED - Estimate your pulse using just your phone's camera — no watch required - Advanced signal processing with motion detection for a steadier reading - Confidence score shown with every result, so you know how reliable it is - Estimate only — not a medical device; consult a doctor for medical concerns 👣 AUTOMATIC STEP & DISTANCE TRACKING - Real-time step count, speed, and distance as you walk - Calorie tracking using the Shinshu MET formula, including afterburn (EPOC) calories your body keeps burning after your walk ⌚ SMARTWATCH COMPANION - Control your workout from your wrist — start, pause, skip, and finish without touching your phone - Live interval, heart rate, and cycle progress synced in real time - Works automatically if you have a paired Wear OS device — the app runs perfectly fine without one too 📊 TRENDS THAT KEEP YOU CONSISTENT - Weekly goal ring tracks your 4-day/week target - Lifetime stats: total fast minutes, distance, and calories burned - Shareable workout cards for your streaks 🤖 AI COACH & SCIENCE GUIDES - Ask questions about pacing, posture, and recovery, answered instantly - Research-based articles on the Shinshu protocol, joint health, and breathing technique — no subscription required 🌍 BUILT FOR EVERYONE - Available in English, Japanese, German, French, Spanish, and Arabic - Light and Dark themes - Daily reminders keep your streak alive Based on real published research from Shinshu University, this isn't a generic step counter — it's a structured training method studied for its effects on VO2 max, blood pressure, and leg strength compared to continuous walking. Download now and start your first 3x3 interval walk today.