Walking is the simplest form of exercise. While it is something that we are genetically designed to do, there has been debate on its efficiency as a full-fledged form of exercise. In the latest development, scientists in Japan have taken this activity and supercharged it into a research-backed, age-defying fitness routine that's going viral across the world. Called Interval Walking Training (IWT), its health benefits have not stunned even the most dedicated gym goers. So What Exactly IS Interval Walking Training?Developed by exercise physiologist Dr. Hiroshi Nose, this method alternates between three minutes of brisk walking and three minutes of easy pacing, repeated five times in a 30-minute session. As per its creators, it is all about small bursts of energy. The results? A fitter heart, stronger legs, and even a shot at turning back the biological clock.How Is It Different From Regular Walking?Most people associate High-Intensity Interval Training (HIIT) with gruelling sprints or gasping for air on a spin bike. But IWT flips the idea by using something as accessible as walking. And yet, this deceptively gentle routine does more for your metabolism, cardiovascular health, and fat burn than hours of slow-paced activity.The technique has a empirical backing too. Scientific trials in Japan have shown that those who practised this method four times a week for three months saw measurable improvements in cholesterol, blood pressure, blood sugar levels, and even muscle strength. One 68-year-old participant had his heart rate shoot up to 130 bpm during the fast intervals — a pace comparable to moderate cycling.Can It Reverse Ageing?The creator of this walking method, Dr. Nose, even claims that consistent IWT participants improved their aerobic power and thigh muscle strength by 20% — enough to make you feel ten years younger. For many, symptoms of lifestyle diseases like hypertension and obesity dropped significantly, and depression scores were halved.Why Does Japanese Walking Work So Well?It is all in the timing and intensity. During fast-paced intervals, your body taps into glycogen stores and increases oxygen demand, triggering a cascade of metabolic benefits. The alternation between effort and recovery mimics the rhythm of elite athlete training, just with lower impact, making it ideal for seniors, beginners, or anyone recovering from a sedentary slump.This burst-and-breathe pattern revs up your heart rate, challenges muscle coordination, and improves balance, especially in older adults. The circulation boost helps detoxify organs, enhance nutrient absorption, and sharpen mental clarity, making it not just a physical workout but a rejuvenating full-body experience.Variations For Every LifestyleWant to take it up a notch? Add light weights to your walk to tone muscles and increase calorie burn. Want to spice things up indoors? Try zig-zag paths, backwards walks, or figure-8 routes to engage underused muscles and keep your mind focused. These patterns not only improve neuromuscular coordination but also keep boredom at bay. So the next time you’re thinking of skipping your workout, remember: A smarter walk could be your shortcut to a longer, stronger, and more balanced life.