Why is cardio good for fat loss?
Cardio is short for “cardiovascular activity." Sometimes it's also referred to as aerobic exercise. Cardio helps bump up your blood pumping and breathing rates, resulting in a great workout for your heart and large muscle groups (think torso and legs).
This type of exercise is good for fat loss because it helps you burn more calories, plain and simple. The exact number of calories you need to burn to lose a pound of fat depends on your metabolism, but generally, you need to burn about 3,500 calories to lose 1 pound of fat in a week.
Cardio's cool for burning calories, but it's not the *best* option for fat loss. That's because while cardio burns calories while you move, strength training can actually help your body keep burning more calories through the day and night (more on that later).