International Journal of Yoga

: 2014  |  Volume : 7  |  Issue : 1  |  Page : 32--40

Can yoga practices benefit health by improving organism regulation? Evidence from electrodermal measures of acupuncture meridians

Bhawna Sharma1, Alex Hankey2, Niharika Nagilla1, Kaniyamparambil Baburajan Meenakshy1, Hongasandra Ramarao Nagendra3,  
1 Divisions of Yoga and Life Sciences, Swami Vivekananda Yoga Anusandhana Samsthana University, Bangalore, Karnataka, India
2 Divisions of Yoga and Physical Sciences, Swami Vivekananda Yoga Anusandhana Samsthana University, Bangalore, Karnataka, India
3 Chancellor's Office, Swami Vivekananda Yoga Anusandhana Samsthana University, Bangalore, Karnataka, India

Correspondence Address:
Bhawna Sharma
Swami Vivekananda Yoga Anusandhana Samsthana Yoga University, 19, Eknath Bhavan, Gavipuram Circle, KG Nagar, Bangalore 560 019, Karnataka


Objectives: To document and explain Yoga«SQ»s effects on acupuncture meridian energies. To understand mechanisms behind Yoga«SQ»s efficacy by testing links between yoga and traditional Chinese medicine. Materials and Methods: The study compared two groups of yoga practitioners: Novice and experienced. Novices consisted of 33 volunteers from a Swami Vivekananda Yoga Anusandhana Samsthana (S-VYASA) yoga instructor training module and the experienced practitioners were 20 resident SVYASA students. The intervention was 3 weeks of a yoga training program, new for the novices, but the lifestyle of the experienced group, who were therefore assessed only once. Novices were assessed on day 2 and 23 of their program at SVYASA«SQ»s Yoga Medicine Hospital, making their data a pre-post, self-as-control, prospective study. Main outcome measures were mean acumeridian energy levels assessed by AcuGraph3 measures of electrodermal resistance at acupoints; additionally, gender differences, standard deviations (SDs) of all measures, and comparison of post and experienced group data. Results: Averaged energy levels significantly improved in all 24 meridians (maximum P = 0.032, 4-P < 0.01, and 19-P < 0.001). Females improved more than males (P < 0.05), both ending at similar levels to experienced practitioners, whose SDs were lower than novices on 19/24 meridians (mean F = 3.715, P = 0.0022), and 4/5 average variables. Conclusions: AcuGraph3 electrodermal measures contain substantial information, P << 0.00001. Yoga-lifestyle practice can increase and balance acumeridian energies; long-term practice decreases group SD«SQ»s. These three suggest reasons why yoga practice impacts health: One, increased prana levels are important; two and three, improved physiological regulation is the key. Further studies relating traditional Indian and Chinese medical systems are needed.

How to cite this article:
Sharma B, Hankey A, Nagilla N, Meenakshy KB, Nagendra HR. Can yoga practices benefit health by improving organism regulation? Evidence from electrodermal measures of acupuncture meridians.Int J Yoga 2014;7:32-40

How to cite this URL:
Sharma B, Hankey A, Nagilla N, Meenakshy KB, Nagendra HR. Can yoga practices benefit health by improving organism regulation? Evidence from electrodermal measures of acupuncture meridians. Int J Yoga [serial online] 2014 [cited 2022 Aug 9 ];7:32-40
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This paper explores mechanisms behind yoga's well-documented health benefits demonstrated in many studies. [1],[2],[3],[4],[5],[6],[7],[8],[9],[10],[11],[12],[13],[14],[15],[16],[17],[18],[19],[20] How practices such as yoga postures (asanas) and breathing exercises (pranayama) achieve their results is not scientifically understood, though traditional texts propose a detailed phenomenology. Research on yoga-based techniques first reached top scientific journals in the 1970's, [1],[2] and for yogasanas and pranayama, with Nagendra and Nagarathna's demonstration of their benefits for asthma. [3],[4] The first-named spawned two major bodies of health research: First on effects of Transcendental Meditation (TM) on such variables as anxiety, [5] substance abuse, [6] and hypertension; [7],[8] and, second, to investigations of the 'relaxation response', [9] a founding pillar of mind-body medicine. The asthma studies have since led to many specialized yoga programs for: Autism, [10],[11] pregnancy, [12] back pain, [13] climacteric syndrome, [14],[15] and oncology, [16] particularly to quality of life (QoL) in breast cancer patients; [17],[18] and other conditions including diabetes [19] and obesity. [20] Levels of potential benefit are high; back pain is primary care's highest reporting condition; [13] type 2 diabetes mellitus is a modern scourge; [21] obesity contributes to many serious disorders through metabolic syndrome. [22] Yoga's history of published research demonstrates large effects, [23] many comparable to western drug-based treatments, [24] and with side-benefits. [25] Official funding has supported their study: Major National Institutes of Health (NIH) grants for QoL in breast cancer patients; [17],[18],[26]

$24 million from National Center for Complementary and Alternative Medicine (NCCAM) for TM's effects on hypertension, [27],[28] particularly in minorities. [29] Overall health benefits are substantial: A controlled study of long-term TM practitioners found 50% decrease in health insurance costs; [30] another, 7% annual decrease in general practitioner (GP) costs for new practitioners. [31]

Yoga practices increase well-being, [24],[32] but the question how this happens remains unanswered. The genetic paradigm regards life and health in biochemical terms, but how could postures, breathing exercises, or meditation bring about biochemical changes? A possible mechanism is yoga's action on the autonomic nervous system [33] restoring balance between sympathetic and parasympathetic activation, [34] both essential for healthy function. That yoga practices restore 'balance' to physiological systems is central to yoga philosophy. Traditional texts ascribe the power to balance to 'prana', [35] a principle activated by all aspects of yoga, especially pranayama-literally the 'ayama' (activation) of 'prana'. Biologically, 'improved balance' is brought about by improved system regulation, which clearly improves health. Here, we report expanded analysis of a yoga study suggesting such a mechanism: Impact on prana levels of 3 weeks' yoga-lifestyle intervention. [36],[37] Indian systems provide no direct measures of prana, but it is thought equivalent to 'Qi' [38] in traditional Chinese medicine (TCM) [39],[40] [Appendix 1] [SUPPORTING:1]. Today, electrodermal measurements of meridian bioimpedance are a recognized means to assess Qi imbalances, and constitute a major diagnostic tool. [41],[42],[43],[44] That meridian imbalance measured electrodermally corresponds to pathology is well understood. [41],[42] Sancier noted negative correlations between bio-impedance in meridians and health status of corresponding organs. [45] His subsequent pre-post study of a two day Qigong workshop found improved Qi balance. [46]

Of the electrodermal screening instruments measuring 'Qi' available in the market, AcuGraph3 Digital Meridian Imaging Tool [47] is one for which test retest repeatability and coefficient of variation (CV) have been assessed for single operators (r = 0.76, CV = 25.9%). [48] Another study [49] found subject dependence of r values, r = 0.23 ± 0.27, but values were far higher for emotionally stable subjects: 0.61 < r < 0.9. CV for measurements on individual meridians, on the other hand, ranged from 5.6% to as high as 45%, suggesting that the machine could be made more accurate by assessing average values for groups, which would reduce CVs by a factor equal to the square root of the number in the group.

We used AcuGraph3 [47] to assess effects of a yoga-lifestyle intervention, the experimental hypothesis being, by analogy with Sancier, [46] that the intervention would produce improvements in acumeridian energy levels and stability. Our approach employed electrodermal measurements at Jing-Well acumeridian endpoints, which correlate with levels of Qi, [50] to study both novice and experienced yoga practitioners. Preliminary analysis [36],[37] reported group mean changes in six average variables

pre/post novices' yoga-lifestyle course. Correlation analysis revealed shifts towards normal at both ends of balance variable distributions, reducing standard deviations (SDs): Post intervention percentages of subjects with values in the healthy range increased. [37] Participation in the yoga program improved regulation of Qi levels as well as increasing them. Here, we present further data analysis confirming these results: Gender and individual meridian differences and comparison with an experienced group.

 Materials and Methods


Thirty-three healthy volunteers (15 male, 18 female) attending a yoga instructors course (YIC) (Novice) and 20 male residents (experienced) at Swami Vivekananda Yoga Anusandhana Samsthana's (SVYASA's) campus.

Inclusion criteria

Novices: Attending YIC; understand English instructions; 18-55 years old; 12 th standard education complete; willing to volunteer. Experienced group: Minimum 6 months yoga-lifestyle program.

Exclusion criteria

Diagnosed illness or disability; on medication; abnormality at a Jing-Well point. For ladies: Pregnancy or menstruation on measurement day.

Study design

Two group design, including novices as the experimental group and experienced yoga students as controls.

Novices: Two assessments, on training program day 2 (pre) and day 23 (post).

Experienced group (added as a control group to evaluate possible long-term effects): One assessment.


The yoga-lifestyle intervention, consisted of 3-week, intensive, residential yoga training, incorporating specific rising (04:30) and retiring times (21:00); vegetarian diet; group meetings with singing (bhajans); and theory lectures. Yoga practices included yoga postures (asanas), breathing exercises (pranayama), yoga purification practices (kriyas), and yogic games; and stress management and relaxation techniques, including meditation practices.


Electrodermal resistance was measured using AcuGraph3 at the Jing-Well endpoints of the 12 main acupuncture meridians on both sides of the body (six on each hand, six on each foot), [47] named for 12 major organs: Lung, pericardium, heart, small intestine, triple energizer, large intestine, spleen, liver, kidney, bladder, gall bladder, and stomach (for standard abbreviations see Appendix 2). To keep instrument pressure, location and alignment uniform, and to increase consistency; pre-post measurements were taken by a single, trained operator [48] (NN) not involved in study design or intervention. Experienced group data was taken by her trainer (MKB).

Procedure for AcuGraph3 measurements

Subjects sit comfortably on a chair, with feet on a mat. Damp cotton wool is applied to each acupoint to improve conductivity. With a 'ground bar' held in the opposite hand, the probe is applied to each point in the specified order. Readings are recorded when taken. For each subject, pre and post data was collected at the same time of day between 09:30 and 13:00.

Monograph: [Figure 1]a and b.{Figure 1}

Data analysis

Statistical Packages for Social Sciences (SPSS) version 16, Shapiro-Wilk tests were used to assess normality of distributions: Almost all variables were normally distributed, so pre-post changes were evaluated with paired sample t-tests, and male-female differences and novice-experienced group comparisons with independent sample t-tests; between group differences in SD were evaluated with F-tests.


Novice group pre-post results

Of the 33 novice subjects, five (one female, four male) gave very high or very low meridian readings, either due to hyperhidrosis or previously undetected pathology, and were therefore excluded from further analysis. Data from the remaining 28 subjects (17 female, 25.41 ± 5.69 years; 11 male, 27.00 ± 8.87 years) was analyzed. The preliminary analysis [37] was restricted to the novice group's pre- and post-means for AcuGraph3's six average variables. Here, we extend this to individual meridians, and male-female differences. Post readings for the whole group showed significant increases in group average values for all meridians [Figure 2]a, 19 meridians P < 0.001 (minimum P = 1.05 × 10–7 ), four meridians 0.001 < P < 0.01, one meridian 0.01 < P =0.015 < 0.05). Mean energy level (EL) increased significantly, but no significant change occurred in overall Yin-Yang balance, upper-lower balance or left-right balance [Table 1], as previously stated. [37] However, the preliminary analysis noted a distinct narrowing of the mean ± 2SD's in upper-lower and left-right balance variables, which was shown to originate in highly significant, negative correlations between pre-values and pre-post differences (P < 0.001) in both variables [37] [Table 2]a and b].{Figure 2}{Table 1}{Table 2}

Separate analysis of male and female data revealed important between gender differences: Female average meridian energy level preintervention (55.76 ± 16.49) was significantly lower than male (68.09 ± 20.27), P < 0.001, in agreement with previous AcuGraph3 analysis of between gender differences. [51] Postintervention they were slightly higher, almost reaching significance, P = 0.0514. As a result of this reverse, female data for individual meridians showed significantly greater increases than did the corresponding male data: Significantly increased mean values in all 24 meridians [Figure 2]b; male data, on the other hand, showed increased values in 23 of 24 meridians, of which 13 were significant P < 0.05, and another group of three were between 0.05 and 0.066. Three meridians were essentially unchanged on both left and right sides, liver, lung, and large intestine [Figure 2]c; and another two also had P ≥ 0.168. The reasons for this split require further investigation, as it was not present in the female data. Finally, female data showed a significant shift from Yang to Yin [Table 1].

Comparison of yoga and novice group

To assess the progress of effects of yoga-lifestyle for the novice group, their data was compared with results of measurements on a more experienced group of SVYASA students who had been participating in similar yoga-lifestyle programs for a minimum of 6 months (mean 18.6 ± 16.85 months) [Table 2]a. It is of significance that mean energy levels were effectively identical (P = 0.88), but mean energy stability of the experienced group was much higher (P < 0.0001), while the various kinds of balance (personal integrated energy (PIE), Yin/Yang, upper-lower, and left-right) were all significantly improved for the experienced group [Table 2]a for P values].

Of particular interest are the SD's on the six variables in [Table 2]a, which were smaller for the long-term yoga group than for novice post measurements (and pre-measurements, see [Table 1]), indicating that long term yoga-lifestyle has a substantial normalizing effect on acumeridian energies, balancing energies in different meridians to a great extent. The significance of six to zero change on the null hypothesis is 2 -6 = 0.015625; for individual F-values for significance of change in SD, see [Table 2]b.

Furthermore, reductions in SDs between novice post, and the experienced group, data were observed for 23 out of 24 sets of individual meridians. The mean F-value was 3.714 ± 1.707, with a corresponding average P ~ 0.0005 for each of the 24 meridians [Table 2]c. The SD of mean meridian energies for the experienced group was also greatly reduced, F = 9.58 [Table 2]c, something evident from inspection of [Figure 2]d.


Principal findings

The 3 week integrated yoga-lifestyle module produced several significant results: (1) Decrease in meridian bioimpedance corresponding to increased meridian energy levels, the changes being about twice as large for female subjects as for males, and in all meridians in females; whereas three meridians in males, the liver, lung, and large intestine were unaffected. (2) Energy levels in the post readings of the novice group were comparable to those of the long-term yoga-lifestyle program participants, but their variability was far higher. SDs for the experienced group were significantly lower, both for individual acumeridians (all but one) and importantly, for the six average variables, including the balance variables.

Reasons for observed accumulating increases in energy levels may be partly due to yoga-lifestyle and partly due to the environment, which is rural and relaxing, allowing participants' sense of well-being to improve. Yoga practices aim to increase prana levels in the body; this, we hypothesize to be the reason for almost universal increases in AcuGraph3 readings on individual meridians, since Qi energy and prana are usually taken as synonymous.

Strengths and weaknesses

The strength of the study lies in data consistency and high statistical significance of findings. Significant increases in energy levels were observed in all meridians; similarly the decrease in SDs yielded an impressive range of F-values and corresponding statistical significances. Although the study was small, the results seem robust. Clearly the size of the groups and subgroups should ideally be larger, but the robustness and significance of the results make them worthy of wide dissemination, especially as both yoga and acupuncture are increasingly widely practiced.

Another weakness was the control group of experienced subjects, who were not matched to the novice subjects. At SVYASA, we are less concerned about which aspects of yoga life-style programs produce which changes. The chief concern is the overall impact of programs received by patients, that is, all aspects of a yoga-lifestyle program. The pre-post design suffices to assess overall impact. The proximity of the experienced group's mean meridian energy to that of the novice group's post data [Table 2]a, appears to make up for that defect. In contrast, three average variables in the experienced group provided interesting extensions of observed pre-to-post changes in the novice group's data.

Relation to other studies

As far as we know, this study, showing that yoga practice improves readings on average acumeridian energies, is the first of its particular kind. Sancier's 1994 pilot study of the effect of Qigong on acupuncture meridians [45] found increased mean meridian energies following practice of a qigong exercise of the subject's choice. His 2003 study of the effect of a Qigong workshop [46] found significantly reduced SD's between mornings and afternoons, which he interpreted as indicating increased balance of body energy due to participation in the workshop. However, his observations of increased meridian energies in the afternoon following Qigong practice could not be distinguished from biorhythms. Our measurements were specifically made at precisely the same times of day, meaning that changes in individual readings cannot be attributed to diurnal biorhythms. Our decreased SD's are greater than Sancier's and indicate that balance is stabilized by long-term practice. As regards male-female differences, the initial values in our study agree with previous findings, [51] that average female meridian energies tend to be lower than males, but their final values, with females roughly equal to males on average, suggest that female meridian energies should be the same as males. Reasons for the widely observed discrepancies clearly need further investigation.

Meaning of the study

One can interpret our results on two levels: First that of the acumeridians themselves, and modern phenomenological interpretations of their energies for individual health; second, in terms of yoga concepts and phenomenology. In the first case, they suggest that yoga-lifestyle programs result in two kinds of effect, those that increase energies, and those that establish better balance between meridians. Increased energies could be achieved two ways, either by increasing energy at source, or by removing blockages and opening meridians up to permit freer flow of Qi. or Prana. [52] Yoga offers an energy-based therapeutic approach [53] , which improves the sense of well-being. [54] Its practices calm the mind [55],[56] ; by balancing Prana in the nadis, they restore equilibrium. [35],[52] In the language of the ancient Yoga texts, this translates as opening up nadi channels to allow freer flow of Prana [35],[52] . The texts explain how Prana is brought into equilibrium [57],[58],[59] , and how various kinds of stress can disturb or block its flow. [60],[61],[62] If not redressed, such imbalances in the body lead to vyadhi (disease). [63] Yoga medicine [64] therefore acts as an energy medicine.

In the language of yoga, this translates as, opening up nadi channels to allow freer flow of prana, as stated in ancient texts. [35],[52] Our observations of increased average energy levels suggest that prana flow improves in the whole body, creating better health. [45] Our observations of consistently decreased SD's of meridian energies and balance variables for the experienced group suggest that regulation of meridian energies is improved, and thus that regulation of associated physiological processes has become more sensitive. This suggests that incorporating yoga activities into a person's lifestyle should improve meridian energy levels and balance, and thus, individual health. [45],[53],[54] This would agree with yoga texts, which state that persistent yoga practice creates a peaceful mind and improves health. [55],[56] Modern medical science is coming to view regulation as central to health: The converse of the recognition that regulatory failure compromises health, is that improving regulation improves health. [39],[40] The idea that improved prana assists balance in system regulation would help explain findings of research on yoga's health benefits. [3],[4],[5],[6],[7],[8],[10],[11],[12],[13],[14],[15],[16],[17],[18],[19],[20] Consistency of these results is attributable to use of specific styles of yoga in integrative health programs run by physicians with western medical degrees.

Questions for future research

Our results suggest that yoga's success in therapy [10],[11],[12],[13],[14],[15],[16],[17],[18],[19],[20] springs from its ability to influence system regulation, and correct faults in that area through the agency of the pranic energy system. If so, improving balance in energy levels; both 'energy stability' in AcuGraph3 terms and reduction in group SD's is important. Determining which yogic practices most effectively remove blockages, and regularize flow of prana through the nadis would be valuable. Both TCM and Indian systems of medicine state that, to bring patients to states of good health, all physiological systems, that is, all organs and organ systems should be brought into balance and their functioning optimized. Future work should aim to establish the validity of this concept of balance, even samatvam, the state of optimal or perfect health. Regarding male and female differences, the most remarkable contrast was that, in the female group, the liver meridians increased most in energy by far, whereas in males they increased the least. Reasons for this difference need further investigation. Investigating trends in high initial energy groups with more pranic energy than normal will be a topic of further study, as will the hypothesis that females may be more sensitive than the males to these kinds of change. Future investigations will require large sample sizes and taking into account variables like time in the menstrual cycle. Most important is the need for fully controlled trials to confirm the results of this study and Sancier's. [45],[46] Finally, the relationship between TCM and yoga requires further careful exploration.


Our results suggest reasons why carefully selected yoga practices have significant therapeutic effects: 3 weeks yoga-lifestyle intervention reliably increases conductivity at all Jing-Well acupoints, improves energy stability, and reduces SDs on all variables; indicating that regulation of Qi energies in the acumeridians improves. Could this explain yoga's efficacy in so many clinical applications?

Equating Qi as a form of vital energy flowing in the acumeridians with corresponding yoga concepts of prana as a form of energy flowing in the nadis, means that our observations support traditional explanations for yoga practices' efficacy: They increase and balance the flow of prana in the nadis. This study thus presents a first step to demonstrate how improving measurable attributes of prana through yoga-lifestyle benefits health.


1Wallace RK. Physiological effects of transcendental meditation. Science 1970;167:1751-4.
2Wallace RK, Benson H, Wilson AF. A wakeful hypometabolic physiologic state. Am J Physiol 1971;221:795-9.
3Nagarathna R, Nagendra HR. Yoga for bronchial asthma: A controlled study. Br Med J (Clin Res Ed) 1985;291:1077-9.
4Nagendra HR, Nagarathna R. An integrated approach of yoga therapy for bronchial asthma: A 3-54-months prospective study. J Asthma 1986;23:123-37.
5Eppley KR, Abrams AI, Shear J. Differential effects of relaxation techniques on trait anxiety: A meta-analysis. J Clin Psychol 1989;45:957-74.
6Alexander CN, Robinson P, Rainforth M. Treating and preventing alcohol, nicotine, and drug abuse through transcendental meditation: A review and statistical meta-analysis. Alcohol Treat Q 1994;11:13-87.
7Anderson JW, Liu C, Kryscio RJ. Blood pressure response to transcendental meditation: A meta-analysis. Am J Hypertens 2008;21:310-6.
8Rainforth MV, Schneider RH, Nidich SI, Gaylord-King C, Salerno JW, Anderson JW. Stress reduction programmes in patients with elevated blood pressure: A systematic review and meta-analysis. Curr Hypertens Rep 2007;9:520-8.
9Benson H, Klipper MZ. The relaxation response. Updated and Expandedth ed. New York: HarperCollins; 2000.
10Radhakrishna S, Nagarathna R, Nagendra HR. Integrated approach to yoga therapy and autism spectrum disorders. J Ayurveda Integr Med 2010;1:120-4.
11Radhakrishna S. Application of integrated yoga therapy to increase imitation in children with autism spectrum disorder. Int J Yoga 2010;3:26-30.
12Satyapriya M, Nagendra HR, Nagarathna R, Padmalatha V. Effect of integrated yoga on stress and heart rate variability in pregnant women. Int J Gynaecol Obstet 2009;104:218-22.
13Tekur P, Nagarathna R, Chametcha S, Hankey A, Nagendra HR. A comprehensive yoga programme improves pain, anxiety and depression in chronic low back pain patients more than exercise: An RCT. Complement Ther Med 2012;20:107-18.
14Chattha R, Nagarathna R, Padmalatha V, Nagendra HR. Effect of yoga on cognitive functions in climacteric syndrome: A randomised controlled study. BJOG 2008;115:991-1000.
15Chattha R, Raghuram N, Venkatram P, Hongasandra NR. Treating the climacteric symptoms in Indian women with an integrated approach to yoga therapy: A randomized control study. Menopause 2008;15:862-70.
16Friedman J, Kligler B, Hommel P, Merrell W. Decreased medication use and cost savings in inpatient oncology through a yoga-based integrative medicine approach. BMC Complement Altern Med 2012;12 Suppl 1:P59.
17Cohen L, Chandwani KD, Raghuram NV, Haddad R, Perkins GH, Spelman A, et al. Yoga for women with breast cancer undergoing radiotherapy (XRT): A randomized clinical trial with an active stretching control group. BMC Complement Altern Med 2012;12 Suppl 1:O38.
18Chandwani KD, Thornton B, Perkins GH, Arun B, Raghuram NV, Nagendra HR, et al. Yoga improves quality of life and benefit finding in women undergoing radiotherapy for breast cancer. J Soc Integr Oncol 2010;8:43-55.
19Hegde SV, Adhikari P, Kotian S, Pinto VJ, D'Souza S, D'Souza V. Effect of 3-month yoga on oxidative stress in type 2 diabetes with or without complications: A controlled clinical trial. Diabetes Care 2011;34:2208-10.
20Lee JA, Kim JW, Kim DY. Effects of yoga exercise on serum adiponectin and metabolic syndrome factors in obese postmenopausal women. Menopause 2012;19:296-301.
21American Diabetes Association. Diabetes statistics. 2011. Available from: [Last accessed on 2013 Jan 9].
22Power C, Thomas C. Changes in BMI, duration of overweight and obesity and glucose metabolism: 45 years of follow-up of a birth cohort. Diabetes Care 2011;34:1986-91.
23Orme-Johnson DW, Walton KG. All approaches to preventing or reversing effect of stress are not the same. Am J Health Promot 1998;12:297-9.
24Chaoul MA, Cohen L. Rethinking yoga and the application of yoga in modern medicine. Cross Curr 2010;60:144-67.
25Bhargav H, Raghuram N, Rao NH, Tekur P, Koka PS. Potential yoga modules for treatment of hematooietic inhibition in HIV-1 infection. J Stem Cells 2010;5:129-48.
26Bower JE, Garet D, Sternlieb B, Ganz PA, Irwin MR, Olmstead R, et al. Yoga for persistent fatigue in breast cancer survivors: A randomized controlled trial. Cancer 2012;118:3766-75.
27Orme-Johnson DW, Barnes VA, Schneider RH. Transcendental meditation for primary and secondary prevention of coronary heart disease. In: Allan R, Fisher J, editors. Heart and Mind: The Practice of Cardiac Psychology. 2 nd ed. Washington, DC: American Psychological Association; 2011. p. 365-79.
28Watson KG, Schneider RH, Nidich S. Review of Controlled Research on the Transcendental Meditation Program and Cardiovascular Disease: Risk Factors, Morbidity, and Mortality. Cardiol Rev 2004; 12:262-6.
29Elder C, Nidich S, Colbert R, Hagelin J, Grayshield L, Oviedo-Lim D, et al. Reduced psychological distress in racial and ethnic minority students practicing the transcendental meditation programme. J Instructional Psychology 2011;38:109-16.
30Orme-Johnson D. Medical care utilisation and the transcendental meditation programmeme. Psychosomatic Med 1987;49:493-507.
31Herron RE, Hillis SL, Mandarino JV, Orme-Johnson DW, Walton KG. The impact of the transcendental meditation programmeme on government payments to physicians in Quebec. Am J Health Promot 1996;10:208-16.
32Edwards E. The role of complementary, alternative and integrative medicine in personalized health care. Neuropsychopharmacology 2012;37:293-5.
33Streeter CC, Gerbarg PL, Saper RB, Ciraulo DA, Brown RP. Effects of yoga on the autonomic nervous system, gamma-aminobutyric-acid, and allostasis in epilepsy, depression, and post-traumatic stress disorder. Me Hypotheses 2012;78:571-9.
34Tharion E, Samuel P, Rajalakshmi R, Gnanasenthil G, Subramanian RK. Influence of deep breathing exercise on spontaneous respiratory rate and heart rate variability: A randomised controlled trial in healthy subjects. Indian J Physiol Pharmacol 2012;56:80-7.
35Frawley D, Ranade S, Lele A. Ayurveda and marma therapy: Energy points in yogic healing. 1 st ed. Wisconsin: Lotus Press; 2003.
36Nagilla N. Effect of integrated yoga module on Acugraph3 measures. MSc Dissertation. Bangalore, India, S-VYASA University; 2012.
37Nagilla N, Hankey A, Nagendra H. Effects of yoga practice on acumeridian energies: Variance reduction implies benefits for regulation. Int J Yoga 2013;6:61-5.
38Tan KY, Liu CB, Chen AH, Ding YJ, Jin HY, Seow-Choen F. The role of traditional Chinese medicine in colorectal cancer treatment. Tech Coloproctol 2008;12:1-6.
39Patwardhan B, Warude D, Pushpangadan P, Bhatt N. Ayurveda and traditional chinese medicine: A comparative overview. Evid Based Complement Alternat Med 2005;2:465-73.
40Hankey A. CAM and the phenomenology of pain. Evid Based Complement Alternat Med 2006;3:139-41.
41Voll R. Twenty years of electroacupuncture diagnosis in Germany. A progress report. Am J Acupunct 1975;3:7-17.
42Nakatani Y. On the nature of the acupuncture points and meridians. J Japan Orient Med 1953;3:39-49.
43Ahn AC, Schnyer R, Conboy L, Laufer MR, Wayne PM. Electrodermal measures of Jing-Well points and their clinical relevance in endometriosis-related chronic pelvic pain. J Alter Complement Med 2009;15:1293-305.
44Weng CS, Tsai YS, Yang CY. Using electrical conductance as the evaluation parameter of pain in patients with low back pain treated by acupuncture like tens. Biomed Eng Appl Basis Comm 2004;16:205-12.
45Sancier KM. The effect of qigong on therapeutic balancing measured by electroacupuncture according to Voll (EAV): A preliminary study. Acupunct Electrother Res 1994;19:119-27.
46Sancier KM. Electrodermal measurements for monitoring the effects of a qigong workshop. J Altern Complement Med 2003;9:235-41.
47Meridia Technologies Inc. AcuGraph3 Digital Meridian Imaging: User Manual. Meridian Technologies. Meridian, Idaho; 2008.
48Mist SD, Aickin M, Kalnins E, Cleaver J, Batchelor R, Thorne T, et al. Reliability of AcuGraph system for measuring skin conductance at acupoints. Acupunct Med 2011;29:221-6.
49Meenakshy KB. Concept of Nadi/Meridian and Prana/Chi: A correlation. MSc Dissertation. Bangalore, India, S-VYASA University; 2009.
50Syldona M, Rein G. The use of DC electrodermal potential measurements and healer's felt sense to assess the energetic nature of qi. J Altern Complement Med 1999;5:329-47.
51Chamberlin S, Colbert AP, Larssen A. Skin conductance at 24 source (Yuan) Acupoints in 8637 patients: Influence of age, gender and time of day. J Acupunct Meridian Stud 2011;4:14-23.
52Muktibodhananda S. Hatha Yoga Pradipika. 3 rd ed. MungerBihar: Yoga Publication Trust; 2009. p. 158.
53Nayak NN, Shankar K. Yoga: A therapeutic approach. Phys Med Rehabil Clin N Am 2004;15:783-98.
54Ryan RM, Frederick C. On energy, personality, and health: Subjective vitality as a dynamic reflection of well-being. J Pers 1997;65:529-65.
55Malhotra V, Tandon OP, Patil R, Sen TK, Lobo SW, Nagamma T, et al. Suryanadi anuloma viloma pranayama modifi es autonomic activity of heart. J Yoga 2009;8:1-5.
56Saraswati SS. Four Chapters on Freedom. 1 st ed. MungerBihar: Yoga Publication Trust; 2008. p. 58.
57Gambhirananda S. Eight Upanishads I. (Kathopnishad Part 2 Canto III). vol 11. Kolkata: Advaita Ashram; 2009. p. 224.
58Muktibodhananda S. Hatha yoga pradipika. 3 rd ed. Munger, Bihar: Yoga Publication Trust; 2009. p. 160.
59Tapasyananda S. Srimadbhagvadgita. Mylapore, Chennai: Sri Ramakrishna Math; 2008. p. 129-30.
60Tapasyananda S. Srimadbhagvadgita. Mylapore, Chennai: Sri Ramakrishna Math; 2008. p. 167-8.
61Datta HS, Mitra SK, Paramesh R, Patawardhan B. Theories and management of aging: Modern and ayurveda perspectives. Evid Based Complement Alternat Med 2011;2011:528527.
62Rosa L, Rosa E, Sarner L, Barrett S. A close look at therapeutic touch. JAMA 1998;279:1005-10.
63Nagarathna R, Nagendra HR. Integrated approach of yoga therapy for Positive Health. 1 st revised ed. Bangalore, India: Swami Vivekananda Yoga Prakashana; 2010. p. 27-36.
64Nagarathna R. Yoga in Medicine. In: Shah SN, editor. API Text Book of Medicine. Vol II. 8 th ed. Mumbai: The Association of Physician of India; 2008.