Cardiac function class II mainly refers to patients with heart failure whose cardiac function is graded as class II, and who will show symptoms such as shortness of breath and chest tightness when performing slightly heavy physical activities. The second level of heart function can be exercised through slow walking, tai chi and other physical activities, and the program can be adjusted according to the individual situation under the guidance of the doctor. 1. Slow walking: in daily life, you can walk slowly for a certain period of time every day, especially pay attention to the time of slow walking should not be too long, and also need to reasonably control the speed of slow walking, so as to promote blood circulation to a certain extent, but also be able to regulate the body metabolism, enhance the heart function, and to achieve the purpose of exercising the heart. 2. Taijiquan: Since the movements of taijiquan are relatively slow and belong to light sports, regular playing of taijiquan can not only relieve the muscle tissues of the limbs, but also promote the blood supply of the heart and reduce the burden on the heart, thus exercising the function of the heart. The above mentioned exercise activities can only play an auxiliary therapeutic role for this kind of patients, and patients should first go to the hospital to receive standardized treatment when they have an attack of this disease.