Cardio is short for cardiovascular exercise. Generally, all exercise can be divided into aerobic and non-aerobic and cardio refers to the former. Fast walking, running, swimming, aerobics, cycling are all forms of cardio exercises. Cardio exercises increases metabolism and are a key element of any weight loss programme. For a workout to target cardiac muscles, it should increase the heart rate sufficiently and should be able to maintain it in an elevated state for a longer time. If you’re doing a cardio workout for the first time, you should limit the duration to 20-minutes. As your stamina increases you will be able to increase the duration and the intensity of your cardio exercise. Another important aspect of cardio exercises is keeping in mind that you shouldn’t over do it. Good cardio training has a lot of health benefits but overdoing can cause knee problems, muscle loss and extreme fatigue. This section will help you with everything you want to know about cardio exercises and workout. For example, things you should know before starting a cardio workout and expert tips on running, especially for marathon runners.