Effects of Tai Chi on Heart Rate Variability Parameters and Stress
http://www.americantaichi.net/TaiChiQigongForHealthArticle.asp?cID=2&sID=10&article=chi_201811_2&subject=Mental%20Health Heart rate...
Tai Chi in Federal Government's Guidelines for Physical Activities
http://www.americantaichi.net/TaiChiQigongFitnessArticle.asp?cID=2&sID=8&article=chi_201811_3&subject=Fitness The U.S. Department of...
