In the last decade, exercise interventions, as assisting pharmacological treatments of Parkinson's Disease (PD), showed desirable effects on improving balance, gait, and overall functional status of individuals with mild to moderate PD through experience-dependent neuroplasticity. A large number of basic researches have also reported that exercises promoted cell proliferation and neuronal differentiation in animal models of PD. Tai Chi, as a mind-body exercise consisting of proper breathing and slow controlled movements, has shown beneficial effects on improving muscle strength, balance, and motor function in older adults. It has been listed by the National Parkinson Foundation of the United States as one of the exercises to be beneficial for related clinical symptoms of PD. However, the studies of Tai Chi for PD reported conflicting results. Reported significant improvements in balance, functional capacity, and falls after Tai Chi exercise. In contrast, reported that Tai Chi was ineffective on either improving gait dysfunction or reducing Parkinson disability. 

Therefore, the aim of this systematic review is to summarize and evaluate the evidence on the effectiveness of Tai Chi for PD. And the meta-analyses of Tai Chi for PD were conducted especially on motor function, balance, gait, and quality of life in individuals with PD.