Japanese walking is becoming the latest fitness craze - taking over trendy workouts like Pilates, yoga and spin classes.
The exercise consists of bursts of slow and fast walking which increases your heart rate. Also known as the '3-3 walking workout', you walk with intensity for three minutes, then slow down for the next three.
This is repeated five times, totalling 30 minutes.
It was developed by Professor Hiroshi Nose and Associate Professor Shizue Masuki at Shinshu University in Matsumoto, Japan, to help elderly people get the health benefits experienced by athletes undertaking high-intensity interval training.
The three minute benchmark is when the researchers found most of the older citizens tended to get tired.
