A wealth of research is emerging to document the many benefits of practicing tai chi and qigong.

Tai chi and Bone Mineral Density:

QiGong and Fatigue, Sleep:

Tai Chi Improves Sleep Quality in Healthy Adults and Patients with Chronic Conditions: A Systematic Review and Meta-analysis

The Harvard Medical School Guide to Tai Chi. Peter M. Wayne, Ph.D. with Mark L. Fuerst. Available through most booksellers.