Cardio Workout is a form of excercise primarily focusing on strengthening/conditioning the heart.Cardio exercises ensure that the heart is put through enough rigour to strengthen its muscles.
If you are a beginner to exercise, start with low to moderately intense cardio activities, so you can do them for long periods of time and gain many health benefits. Common examples include walking, bicycling, swimming, dancing and water aerobics, but don’t limit yourself: You can choose any activities you enjoy, such as canoeing, in-line skating, golfing or martial arts.
If you haven’t gotten enough aerobic exercise, you may use your entire aerobic capacity while walking up a flight of stairs. You'll realize this when you get to the top and feel out of breath. But if you're fit, you'll have no problem because your aerobic capacity is greater. That’s just one example of how you can benefit from cardio exercise.