This study utilized measurable biomarkers to demonstrate the impact of tai chi qigong. It was a relatively large study with a control group and found a statistically significant decrease in Hbq A1C (a pre-diabetes marker), a statistically significant increase in antioxidant markers, and a decrease in the oxidative stress score. The participants did Tai Chi Easy five days a week for six months. This is a impressive study.
Hypoglycemic and antioxidant effect of Tai chi exercise training in older adults with metabolic syndrome.
Clin Interv Aging. 2018 Apr 3;13:523-531. doi: 10.2147/CIA.S157584. eCollection 2018.