“For wholesome adults without heart illness, this kind of exercise can truly improve the well being of your heart. The coronary heart is like another muscle in this method; you’re employed it out and it will get stronger,” says Dr. Tingan. So the logic is should you can construct up your muscle and reduce your physique fats, you’ll have a higher resting metabolism and more rapidly burn the gasoline in your body. But that takes work — a lot more work than a short cardio HIIT workout. To be clear, most of the interval workouts researchers have studied focus solely …