Fitness means being in good physical condition, being healthy, having more energy and better sleep patterns. A person who is fit is also able to carry out tasks more easily. Fitness may help prevent certain diseases such as high blood pressure, diabetes, stroke, cancer, and heart disease. You do not have to be an athlete to be fit. A brisk half-hour walk every day can help you reach a good level of fitness. Staying active and fit can also help you manage your weight and reduce the risk of obesity.