The efficacy of yoga has been baptized for thousands of years and verified by countless people. Now yoga has been recognized as a physical activity with preventive and therapeutic effects, and it is one of the most natural and effective physical therapy methods. Regular practice of yoga can maintain a good physiological state of human body, enhance physical fitness, prevent diseases and promote the recovery of physical function during rehabilitation. Physically speaking, by systematically studying and practicing yoga, we can improve our strength, cardiopulmonary function, flexibility and balance: (1); (2) effectively reducing fat plastic surgery; (3) relieving stress and tension; (4) cheer up; (5) expelling toxins from the body; (6) Beautiful face; (7) preventing the occurrence of diseases and improving symptoms; (8) Increase vitality and prolong life; (9) Develop creativity and enhance memory; (10) Improve thinking ability and concentrate. These are all you can get after you start practicing yoga. If you can keep practicing for a long time, you will look at life from a different angle and have a more peaceful and healthy attitude. Why can yoga bring so many benefits? (1) All-round functions of yoga. Yoga is an exercise of physical and mental cultivation. Yoga posture fully exercises the human spine, thus making the central nervous system healthy. Nothing is more important to physical and mental health than a healthy and functioning nervous system. Yoga exercise not only helps the human body to maintain a healthy nervous system, but also helps the abnormal nervous system to restore its normal function and promote the normal operation of the endocrine system. Many breathing exercises and postures of yoga also have beneficial effects on visceral glands. A person's behavior, mood and even mental state are directly related to the activity of endocrine glands. When endocrine glands release too much or too little hormones into the blood, people's physical and mental health will be adversely affected. Yoga practice helps to regulate the activities of these glands, thus preventing the endocrine system from working abnormally. Yoga pranayama exercise has a good effect on human meditation and decompression, and its effect on respiratory system is self-evident. At the same time, the diaphragm-type whole lung breathing advocated by yoga can also stimulate the lymphatic system, thus effectively detoxifying. In the scientific breathing mode, the blood oxygen content increases, and the brain is naturally in an alert and calm state. (2) The philosophy of yoga. The inherent philosophy of yoga makes the whole yoga practice very logical and controllable. Often in such a benign thinking environment, people's way of thinking also changes in a positive direction. (3) the functionality of yoga. Yoga practice can design different exercise prescription courses according to different people's age, gender and physical condition. Through targeted practice, we can strengthen the declining body function, compensate and restore the defective organ function. To some extent, this is irreplaceable by drug treatment. (4) the initiative of yoga. Yoga is a method that people actively use physical exercise to mobilize their physical potential, which can make people get rid of negative emotions, promote rehabilitation and get out of sub-health state. This article is taken from Han Jun's Yoga Elementary Course published by Liaoning Science and Technology Publishing House.