Japanese 3-3-3 walking rule promises an 18-minute workout

The Japanese 3-3-3 walking rule involves alternating three minutes of slow walking with three minutes of brisk walking, repeated three times for an 18-minute workout. Developed by Professor Hiroshi Nose of Shinshu University, the method aims to improve fitness and cardiovascular health. Supporters say it may help with weight management, blood pressure and blood sugar control.