Taijiquan is world-renowned for its many benefits, especially towards improving health and body conditions:

Relaxing the mind
Taijiquan emphasizes relaxing the body and breathing controls. This is very good towards enhancing blood circulation, alleviating stress, and improving metabolism.

Body conditioning
Although Taijiquan is generally slow and soft, it also requires hardness and steadiness. This can be seen in the shifting of footwork and in the waist, and is very good towards improving leg and waist strength and flexibility.

Preventing and healing ailments
Taijiquan has been shown to be able to prevent and relieve chronic diseases to a certain extent, including anxiety, high blood pressure, heart disease, bronchitis, etc.