Useful. Yoga is useful because it can promote blood circulation, open meridians and contribute to oxygen circulation in the body. In practice, bending forward can promote the flow of yin and bending backward can promote the flow of yang. This combination of yin and yang helps to balance the energy of the body and enhance the health and immunity of the body. In addition, practicing yoga can also improve the flexibility and balance of the body, enhance muscle strength and endurance, improve the functions of respiratory system and digestive system, and relieve stress and fatigue. These benefits can help people keep healthy and improve their quality of life. It should be noted that the practice of yoga supporting yang should be adjusted according to the individual's physical condition and practice level to avoid injury due to excessive practice or posture errors. Beginners are advised to practice under the guidance of a professional yoga teacher.