A Comp. Review identified 163 different physiological and psychological health outcomes of taiji and qigong

This review [published in 2010] has identified numerous outcomes with varying levels of evidence for the efficacy for Qigong and Tai Chi, including bone health, cardiopulmonary fitness and related biomarkers, physical function, falls prevention and balance, general quality of life and patient reported outcomes, immunity, and psychological factors such as anxiety, depression and self-efficacy.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3085832/