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Effect of Tai Chi on Cardiac Autonomic Function and Salivary Cortisol Level in Healthy Adults.

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dc.contributor.author Kalsaria, Pratik
dc.date.accessioned 2012-05-21T16:07:06Z
dc.date.accessioned 2015-10-01T13:47:29Z
dc.date.available 2012-05-21T16:07:06Z
dc.date.available 2015-10-01T13:47:29Z
dc.date.issued 2012-05-21T16:07:06Z
dc.identifier.uri http://hdl.handle.net/10484/4017
dc.description.abstract Introduction: An estimated 8.2 million American adults (1 in 3) have 1 or more types of cardiovascular disease. Heart rate variability (HRV) analysis is considered a non-invasive procedure for analyzing cardiovascular autonomic influence. Depressed HRV has been linked to stress and abnormal cardiovascular autonomic modulation. Purpose: This study evaluated the acute effects of tai chi on cardiac autonomic function and cortisol level in healthy adults. Design: 10 healthy adults, 7 females and 3 males, with an average age of 54 ± 2.04 were included in this study. They were asked not to consume any alcoholic or caffeinated beverages at least 24 hours before the study. Each subject practiced tai chi for 1 hour. HRV measurements were obtained at supine rest using Nexus biofeedback device before and after 10 min, 20 min and 30 min post tai chi exercise. Saliva samples were collected before tai chi and after 45 min post tai chi practice. Results: The cardiac autonomic function was assessed using frequency domain HRV analyses. Repeated measures ANOVA revealed that there is significant difference in means of HR, SDNN, nLF and nHF between the pre tai chi and post tai chi groups. Using student’s T-test, we found that the nHF increased significantly from 42.79 ± 4.12 to 52.82 ± 4.39 after 30 min post tai chi exercise (p<0.05). In contrast, nLF decreased significantly from 57.21 ± 4.12 to 52.82 ± 4.39 after 30 min post tai chi exercise (p<0.05). HR significantly decreased from 73 ± 2 to 67.79 ± 2.94 after 30 min post tai chi exercise. Also, SDNN increased significantly from 34 ± 5.26 to 41.38 ± 6.42 after 30 min post tai chi exercise. No significant changes in cortisol level were observed between pre tai chi and post tai chi groups. Conclusion: Tai chi exercise can modulate cardiac autonomic tone by enhancing the vagal activity and reducing the sympathetic activity. Long-term beneficial effects of tai chi on cardiac autonomic function need further investigation.
dc.description.statementofresponsibility Pratik Kalsaria
dc.language.iso en_US
dc.subject.lcsh Sympathetic nervous system.
dc.subject.lcsh Parasympathetic nervous system.
dc.subject.lcsh Tai chi.
dc.subject.other Heart rate variability.
dc.subject.other Time domain method.
dc.subject.other Frequency domain method.
dc.subject.other Sympathetic activity.
dc.subject.other Parasympathetic activity.
dc.title Effect of Tai Chi on Cardiac Autonomic Function and Salivary Cortisol Level in Healthy Adults.
dc.type Thesis
dc.date.graduationmonth May
dc.date.published 2012
dc.description.committeechair Geib, Roy W
dc.description.committeemembers Moga, Margaret M
dc.description.committeemembers Waite, Gabi
dc.description.degree Master of Science
dc.description.department Department of Biology
dc.description.imprint Cunningham Memorial library, Terre Haute,Indiana State University
dc.description.itemidetd ILL-ETD-090
dc.description.level Masters
dc.description.note Title from document title page. Document formatted into pages: contains 51 p.: ill. Includes abstract and appendix
dc.rights.accessrights If you are the author of this work and would like to have online access removed, please use the feedback form http://scholars.indstate.edu/feedback to contact us


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