They are all good for your health. The premise of both is that you should train under the guidance of a good coach and teacher. As long as the method is correct and the time arrangement is reasonable, it is good for your health.

But Tai Ji Chuan is more suitable for people who are weak, because Tai Ji Chuan moves slowly and softly, so he doesn't need to try his best to practice, and the probability of serious injury is very low. Moreover, Tai Ji Chuan needs to practice some exercises of whole-body qi circulation, and there are corresponding practice methods from consciousness exercise and body control, which are carried out from the inside out and from the outside to the inside at the same time, and the warming effect on body meridians is milder than that of gym training. Tai Ji Chuan mainly cultivates a state of integration of body and mind.

Gymnasium exercise needs to stimulate blood gas operation through equipment, exercise muscles through reasonable movements, cooperate with experienced coaches, arrange exercise methods reasonably and cooperate with corresponding diet plans, and finally change physical fitness. Gym exercise is more fashionable and popular, which can shape the perfect body proportion. If you are a show lover, gym exercise is more suitable.

No matter in Tai Ji Chuan or in the gym, you need a qualified coach, a scientific attitude and a reasonable training arrangement to meet the needs that are beneficial to your health, so there is no need to compare the quality of various sports. However, some intense sports meetings have a high injury rate, which requires you to bear the health problems caused by intense sports according to your own ideals and needs. So I wish you good health.