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.
20-Minute Treadmill Workout If you're looking for a workout that will blast calories in no time at all, check out this 20-minute treadmill workout that's great for when you're short on time. Best Pinterest Workouts of 2014 | POPSUGAR Fitness