Only takes 4 minutes, but its the longest 4 mins of my life: Burns as many calories as a 40-60 minute run. Makes your body adapt and improve very quickly. Increases metabolism for up to the next 36 hrs. Takes only FOUR minutes, Developed by a Japanese Scientist. NO EXCUSES. 4 minute workout? May have to try it soon. [WORLD’S FASTEST WORKOUT] - Burns as many calories as a 40-60 minutes run. - Makes your body adapt and improve very quickly. - Increases metabolism for next 36 hrs - Takes only FOUR minutes, no excuses. 0:00 - Squat Thrust 0:20 - Rest 0:30 - Mountain Climbers 0:50 - Rest 1:00 - High knees 1:20 - Rest 1:30 - Jumping Jacks 1:50 - Rest 2:00 - Squat Thrust 2:20 - Rest 2:30 - Mountain Climbers 2:50 - Rest 3:00 - High Knees 3:20 - Rest 3:30 - Jumping Jacks 3:50 - Rest 4:00 - DONE !