Effect of Pranayama On Stress and Cardiovascular Autonomic Tone & Reactivity
Effect of Pranayama
DOI:
https://doi.org/10.70284/njirm.v2i1.1897Keywords:
Heart rate variability, stress, low frequency, high frequency, very low frequencyAbstract
BACKGROUND :The stress either physical or mental, leads to cardiovascular morbidity. Newly admitted medical students are likely to be exposed to various stresses like change of environment, demanding medical education and different teaching protocol in a medical college. Pranayama is known since ancient times to relieve stress and stabilize autonomic function of the body. METHOD: The subjects were first M.B.B.S students and the sample size was 59 consisting of 27 males and 32 females. The group of students thus selected was briefed about the study. After the orientation session, informed written consent was taken, stress questionnaire was put and the autonomic function tests were done. This was followed by practice of Pranayama for 2 months, 1 hour/day for 5 days/week and again stress questionnaire was put and the autonomic function tests were performed on the study group. RESULTS AND ANALYSIS: The above tests were done before and after the practice of Pranayama. The results obtained were analyzed using SPSS software. CONCLUSION: The stress level has reduced after 2 months of practicing various pranayama as evident by decrease in total stress score which is highly significant. VLF and LF in n.u have reduced significantly after practice of pranayama signifying reduction in sympathetic drive to heart. HF in n.u has increased significantly after practice of pranayama for 2 months showing the increase in parasympathetic output to the heart. LF/HF ratio reduced significantly after 2 months of practice of pranayama indicating a better sympatho vagal balance with resting balance tilting toward better parasympathetic control
References
2. Maunder RG, Lancee WJ, Nolan RP, Hunter JJ, Tannenbaum DW. The relationship of attachment insecurity to subjective stress and autonomic function during standardized acute stress in healthy adults. J Psychosom Res. 2006 Mar; 60(3):283-90.
3. Rosenberg PP. Student’s perception and concerns during their first year in medical school. J Med Educ 1971; 46: 211-218
4. Miller P McC. The first year at medical school: some finding and student perceptions. J Med Educ 1994; 28: 5-7
5. Vitaliano PP, Russo J, Carr JE Heerwagen JH. Medical school pressures and their relationship to anxiety. J Nerv Ment Dis 1984; 29: 119-127
6. Stewart SM, Betson C, Marshall I, Wong CM, Lee PWH. Stress and vulnerability in medical students. Med Educ 1995; 29: 119-127
7. Wolf TM. Stress, coping and health: enhancing well-being during medical school. Med Educ 1994; 28:8-17
8. Rosanki A, Blumenthal JA, Kaplan J. Impact of psychological factors on the pathogenesis of cardiovascular disease and implications for therapy. Circulation 1999; 99: 2192-2217
9. Lucini D, Norbiato G, Clerici M, Pagani M. Haemodynamic and autonomic adjustments to real life stress conditions in humans. Hypertension 2002; 39: 184-188
10. Singh JP, Larson MG, Tsuji H, Evans JC, O’Donnell CJ, Levy D. Reduced heart rate variability and new-onset hypertension: insight into pathogenesis of hypertension: the Framingham heart study. Hypertension 1998; 32: 293-307
11. Task force of the European Society of Cardiology and the North American Society of Pacing and Electrophysiology. Heart Rate Variability Standards of measurement, physiological interpretation and clinical use. Circulation 1996; 93: 1043-65.
12. Iyengar, B. K. S. Light on Pranayama: The Yogic Art of Breathing. New York: Crossroad;1998
13. Mathias CJ and Bannister SR, Investigation of autonomic disorders. In: Bannister SR and Mathias CJ, editors, Autonomic Failure. A text book of clinical disorders of Autonomic Nervous System. 3rd ed. New York: Oxford University press: 1992, p.211-223.
14. Low PA. Laboratory Evaluation of Autonomic Function. In: Low PA, editor. Clinical Autonomic Disorders. New York: Lippincott- Raven Publisher; 1997. p.309-322.15. Malik M. Clinical Guide to Cardiac Autonomic Tests. Netherlands: Kluwer Academic publishers; 1998, p.121-130.
16. Udupa, K. N., & Singh, R. H..The scientific basis of yoga. Journal of the American Medical Society 1972, 220, (10), 1365.
17. Udupa, K. N., Singh, R. H., & Settiwar, R. M. Studies on the effect of some yogic breathing exercises (pranayamas) in normal persons. Indian Journal of Medical Research 1975, 63, (8), 1062-1065.
18. Telles S, Nagarathna R, Nagendra HR. Physiological measures of right nostril breathing. J Altern Complement Med. 1996 Winter; 2(4):479-84.
19. Telles S, Nagarathna R, Nagendra HR. Breathing through a particular nostril can alter metabolism and autonomic activities. Indian J Physiol Pharmacol. 1994 Apr;38(2):133
20. Raghuraj P, Ramakrishnan AG, Nagendra HR, Telles S. Effect of two selected yogic breathing techniques of heart rate variability. Indian J Physiol Pharmacol. 1998 Oct; 42(4):467-72.
21. Pal GK, Velkumary S, Madanmohan. Effect of short-term practice of breathing exercises on autonomic functions in normal human volunteers.Indian J Med Res. 2004 Aug;120(2):115-21
22. Srinivasan, Mario Vaz, Sucharita. A study of stress and autonomic nervous function in first year undergraduate medical students. Ind J Physio and Pharmac. 2006; 50 (3): 257-264.
23. Jerath R, Edry JW, Barnes VA, Jerath V. Physiology of long pranayamic breathing: neural respiratory elements may provide a mechanism that explains how slow deep breathing shifts the autonomic nervous system. Med Hypotheses. 2006;67(3):566-71. Epub 2006 Apr 18.
