Exercises for healthy heartNo matter your weight, cardiovascular, or aerobic, exercise is good for you and can improve your health. Done on a regular basis, cardio reduces your risk of developing chronic disease, boosts mental health and helps you live healthier for longer. Many types of activities can be considered aerobic exercise, as long as you get your heart rate up for a sustained period of time.
Walking is a popular type of aerobic exercise, particularly if you have been inactive. It does not require special equipment and can be done almost anywhere. Walk at a brisk pace to increase your heart rate and to gain the benefits associated with aerobic exercise. Cycling, either outside or on a stationary bike, is another popular type of aerobic exercise. Other types of aerobic exercise include swimming, running, dancing and sports that require continuous movement. Even if you are not overweight, any activities that increase your heart rate for at least 10 minutes at a time are recommended for improved health.
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http://www.livestrong.com/article/547914-good-cardio-exercises-for-a-thin-person/#ixzz1zS9HuXxD