As long as you practice two kinds of fists well, it is most useful for your health. The first one is Tai Ji Chuan, because practicing basic movements combined with deep abdominal breathing can increase your vital capacity. The second kind of boxing is mind six-in-one boxing, and thunder training helps to prevent alveoli from shrinking into scars. Or Tai Ji Chuan can practice slow motion, abdominal deep breathing, hands on the ground, arm punches, fast thunder, and avoid practicing mind Liuhe Quan. In a word, Xingyiquan five elements boxing started from practicing lung, which proves that the ancients attached great importance to lung, and only after lung training can we keep fit. The lungs not only breathe, but also produce immunoglobulins to fight bacterial viruses and help prevent tumors.