Cardiovascular (cardio) exercises are exercises primarily aimed at training the heart and increasing the heart rate. It puts the respiratory system to hard work as you begin to breathe faster. In general, these exercises boost the functions of all body systems, creating an all-around easy flow of processes taking place. They are very effective for fat burning, increasing endurance levels, and strengthening your health. Generally, there are low-intensity cardio exercises and high-intensity cardio exercises. Low-intensity exercises are used for warm-up before the main workout, while, high-intensity exercises as a form of fitness. It is proper to do at least 8-10 minutes of warm-up exercises before the main fitness exercise to not only prepare your body for the workload it’s about to go through but will also strengthen the system’s immunity. If the main workout training is started without a warm-up exercise, the protective functions of the body will be weakened. Cardio exercise done properly should be energizing but not to point of exhaustion. Overworking and pushing the body to perform exercises isn’t ready for causes weakness and dullness after exercising rather than energize. To yield impressive results, workouts of 10-30minutes (depending on what the body was prepared for) should be repeated at most 4-5 times per week, to leave the body with enough resting period, otherwise, muscle mass will be burnt instead of fat. Muscle recovery takes about 48 hours. At the same time to gain benefit from cardio exercises, you need to periodically go beyond your comfort zone, therefore diversifying your training from time to time.