The word “cardio” is short for “cardiovascular,” a term used for the circulatory system consisting of the heart and blood vessels in your body.Cardiovascular health relates to the health of the heart and blood vessels. It also relates to the health of organs that are critically dependent on a strong blood supply. Maintenance of cardiovascular health and prevention of cardiovascular disease can only be resolved with lifestyle changes and not with drugs. Drugs can only ever be used for very short-term relief due to their dangerous side effects Get at least 150 minutes a week of moderate aerobic activity — such as brisk walking, swimming or mowing the lawn — or 75 minutes a week of vigorous aerobic activity — such as running or aerobic dancing. You can also do a combination of moderate and vigorous activity, preferably spread throughout the course of a week.Physical activity also allows better blood flow in the small blood vessels around your heart. Clogs in these arteries can lead to heart attacks. There's also evidence that exercise helps your body make more branches and connections between these blood vessels, so there are other routes for your blood to travel if the usual path is blocked by narrow arteries or fatty deposits.Exercise also increases your levels of HDL cholesterol, the "good" cholesterol that lowers heart disease risk by flushing the artery-clogging LDL or "bad" cholesterol out of your system.According to the definition of cardiorespiratory fitness provided above, it can be broken down into two components. The first component of cardiorespiratory fitness is the ability of your body to transport oxygen to your muscles during prolonged exercise. The second component of cardiorespiratory fitness is the ability of your muscles to absorb and use oxygen while you are exercising. We can start running or doing something for more than 20 minutes.