Comprehensive therapeutic benefits of Taiji: a critical review

 Controlled research evidence was found to confirm therapeutic benefits of Taiji practice with regard to improving quality of life, physical function including activity tolerance and cardiovascular function, pain management, balance and risk of falls reduction, enhancing immune response, and improving flexibility, strength, and kinesthetic sense. 

Health benefits of qigong or tai chi for cancer patients: a systematic review and meta-analyses

Mind-body interventions are widely used by cancer patients to reduce symptoms and cope better with disease- and treatment-related symptoms. 
In the last decade, many clinical controlled trials of qigong/tai chi as a cancer treatment have emerged. This study aimed to quantitatively evaluate the effects of qigong/tai chi on the health-related outcomes of cancer patients.

The effects of mind-body therapies on the immune system: meta-analysis

Mind-body therapies reduce markers of inflammation and influence virus-specific immune responses to vaccination despite minimal evidence suggesting effects on resting anti-viral or enumerative measures.