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Editor's Correspondence
Oct 10, 2011

Yin and Yang of Tai Chi Exercise—Reply

Author Affiliations

Author Affiliations: Division of General Medicine and Primary Care, Department of Medicine, Beth Israel Deaconess Medical Center (Drs Yeh, McCarthy, Wayne, Davis, and Phillips), Division for Research and Education in Complementary and Integrative Medical Therapies, Harvard Medical School (Drs Yeh, Wayne, Davis, and Phillips), Cardiovascular Division, Department of Medicine, Brigham and Women's Hospital (Drs Forman and Stevenson), and Division of Cardiology, Department of Medicine, Massachusetts General Hospital (Dr Wood), Boston, Massachusetts.

Arch Intern Med. 2011;171(18):1685-1686. doi:10.1001/archinternmed.2011.455

In reply

We appreciate the excellent suggestion by Lin and Tzeng to investigate heart rate recovery after peak exercise. Heart rate recovery manifests the changes in autonomic tone that occur following cessation of exercise and has been shown to have prognostic significance, since abnormal parasympathetic-dependent deceleration is associated with increased risk of sudden death. Unfortunately, for this study, we do not have complete and reliable data on heart rate recovery because of nonstandardization of our postexercise procedures. We fully agree that it would be important to incorporate systematically in our ongoing and future trials, since it may yield important information about the role of tai chi in cardiovascular patients.

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