-
[show abstract]
[hide abstract]
ABSTRACT: The practice of yoga is gaining in popularity with a wide range of practices. Recent research and descriptions from the ancient texts are often concurrent with regard to the effects of the practice, taking into account expected differences between modern scientific terms and those used in the original texts. Voluntarily regulated yoga breathing practices form a bridge between physical and mental changes. The voluntarily regulated yoga breathing has distinct effects on metabolism, the autonomic nervous system, higher brain functions, and mental state. The effects of meditation on the nervous system and mental state are even clearer.
The Psychiatric clinics of North America 03/2013; 36(1):93-108. · 1.87 Impact Factor
-
[show abstract]
[hide abstract]
ABSTRACT: Background: Previously alternate nostril yoga breathing (anuloma-viloma pranayama) was shown to reduce the blood pressure (BP) in people with hypertension. An elevated BP has been associated with poor performance in certain tasks requiring attention and co-ordination. The Purdue pegboard task assesses manual dexterity and eye-hand co-ordination. Material/Methods: In the present study there were ninety participants with essential hypertension. Their ages ranged from 20 to 59 years (group average age ±S.D., 49.7±9.5 years; sixty males). Participants were randomized as three groups, with thirty participants in each group. One group practiced alternate nostril yoga breathing for 10 minutes, the second group practiced breath awareness for the same duration and the third group was given a control intervention (i.e., reading a magazine with neutral content). Assessments were taken before and after the interventions for participants of the three groups. Assessments included the blood pressure and performance in the Purdue pegboard task. Data were analyzed with a repeated measures ANOVA and post-hoc analyses were Bonferroni adjusted. Results: Following alternate nostril breathing (ANYB) there was a significant decrease in systolic and diastolic blood pressure (p<0.001 and p<0.05), and an improvement in Purdue pegboard task scores for both hands (p<0.05), and for the right hand (p<.001). Breath awareness (the control session) also showed a significant decrease in systolic blood pressure (p<0.05). The right hand scores improved in the group reading a magazine (p<0.05). Conclusions: The results suggest that the immediate effect of ANYB is to reduce the BP while improving the performing in a task requiring attention, bimanual dexterity and visuo-motor co-ordination.
Medical science monitor: international medical journal of experimental and clinical research 01/2013; 19:61-66. · 1.70 Impact Factor
-
[show abstract]
[hide abstract]
ABSTRACT: Abstract Objectives: In ancient yoga texts there are two meditative states described. One is dharana, which requires focusing, the second is dhyana, during which there is no focusing, but an expansive mental state is reached. While an earlier study did show improved performance in an attention task after dharana, the autonomic changes during these two states have not been studied. Methods: Autonomic and respiratory variables were assessed in 30 healthy male volunteers (group mean age±SD, 29.1±5.1 years) during four mental states described in traditional yoga texts. These four mental states are random thinking (cancalata), nonmeditative focusing (ekagrata), meditative focusing (dharana), and effortless meditation (dhyana). Assessments were made before (5 minutes), during (20 minutes), and after (5 minutes), each of the four states, on four separate days. Results: During dhyana there was a significant increase in the skin resistance level (p<0.001; post hoc analysis following ANOVA, during compared to pre) and photo-plethysmogram amplitude (p<0.05), whereas there was a significant decrease in the heart rate (p<0.001) and breath rate (p<0.001). There was a significant decrease in the low frequency (LF) power (p<0.001) and increase in the high frequency (HF) power (p<0.001) in the frequency domain analysis of the heart rate variability (HRV) spectrum, on which HF power is associated with parasympathetic activity. There was also a significant increase in the NN50 count (the number of interval differences of successive NN intervals greater than 50 ms; p<0.001) and the pNN50 (the proportion derived by dividing NN50 by the total number of NN intervals; p<0.001) in time domain analysis of HRV, both indicative of parasympathetic activity. Conclusions: Maximum changes were seen in autonomic variables and breath rate during the state of effortless meditation (dhyana). The changes were all suggestive of reduced sympathetic activity and/or increased vagal modulation. During dharana there was an increase in skin resistance. The changes in HRV during ekagrata and cancalata were inconclusive.
Journal of alternative and complementary medicine (New York, N.Y.) 09/2012; · 1.69 Impact Factor
-
[show abstract]
[hide abstract]
ABSTRACT: In earlier studies uninostril yoga breathing was shown to influence the activity of the cerebral hemispheres differently, based on (i) auditory evoked potentials recorded from bilateral scalp sites, and (ii) performance in hemisphere-specific tasks. But change in P300 (event-related potential generated when subjects attend to and discriminate between stimuli) from bilateral scalp sites when subjects were practicing uni- and alternate-nostril breathing are yet to be explored.
The present study was designed to determine whether or not immediately after uninostril or alternate nostril yoga breathing there would be a change in the ability to pay attention to a given stimulus.
Twenty-nine healthy male volunteers, with ages between 20 and 45 years were randomly allocated to five sessions, viz., (i) right-, (ii) left-, (iii) alternate-nostril yoga breathing, (iv) breath awareness and (v) no intervention, each for 45 min on separate days. The P300 event related potential was recorded using an auditory oddball paradigm from sites on the left (C3) and right (C4), referenced to linked earlobes, before and after each session.
Post-hoc analysis with Bonferroni adjustment showed that the P300 peak latency was significantly lower at C3 compared to that at C4, following right nostril yoga breathing (P<0.05).
These results suggest that right nostril yoga breathing facilitates the activity of contralateral (left) hemisphere, in the performance of the P300 task.
International Journal of Yoga 07/2012; 5(2):102-7.
-
Medical science monitor: international medical journal of experimental and clinical research 06/2012; 18(7):LE5-6; author reply LE6-7. · 1.70 Impact Factor
-
[show abstract]
[hide abstract]
ABSTRACT: 140 men (M age = 30.3 yr., SD = 5.7) from the Indian army in north India participated in the study. They were naive to yoga and were assigned to yoga and breath awareness groups randomly, with 70 in each group. 20 healthy males of comparable age (M age = 33.7 yr., SD = 7.0) formed a comparison group. Their performance in a digit-letter substitution task and a state anxiety subscale was assessed immediately before and after two 45-min. sessions. The two groups of soldiers practiced either yoga or breath awareness. The comparison group listened to meditation music. Digit-letter substitution scores increased in both groups of army personnel and in the comparison group. State anxiety decreased after yoga and listening to meditation music, but not after breath awareness. This suggests that even in army personnel naive to yoga, a yoga-based intervention or listening to meditation music could reduce anxiety while increasing performance on an attention task.
Psychological Reports 06/2012; 110(3):963-76. · 0.44 Impact Factor
-
[show abstract]
[hide abstract]
ABSTRACT: Mid-latency auditory evoked potentials (MLAEPs) were assessed in 60 participants during 4 mental states described in traditional yoga texts. These 4 mental states are random thinking, nonmeditative-focused thinking, meditative focusing, and meditation. Assessments were made before (5 minutes), during (20 minutes), and after (5 minutes) each of the 4 states, on 4 separate days. There were prolonged latencies of 2 MLAEPs components, the Na and Pa waves during meditation (P < .05, post hoc analyses following analysis of variance [ANOVA]), suggesting that auditory information transmission at the level of the medial geniculate and primary auditory cortex (ie, the neural generators corresponding to the Na and Pa waves) was delayed. Hence, meditation influenced MLAEPs, while meditative focusing did not.
Clinical EEG and neuroscience: official journal of the EEG and Clinical Neuroscience Society (ENCS) 04/2012; 43(2):154-60. · 1.73 Impact Factor
-
[show abstract]
[hide abstract]
ABSTRACT: Students of Ayurveda and qualified Ayurveda practitioners were assessed for awareness about bibliographic databases. One hundred and four volunteers (age range 17-64 years; group mean±SD, 24.3 ± 7.9 years; 62 females) participated in this cross-sectional study. There were 3 groups. Group I had 60 undergraduate students of a bachelor's level course in Ayurveda, Group II had 20 graduate students of a 1-year Panchakarma course, and Group III had 24 Ayurveda physicians who were working in a yoga and Ayurveda center. An 8-question questionnaire was used for assessment. Undergraduates were found to be the best informed, followed by those who were working, while those doing post-graduation were the least well informed. The sample was from one institution; however, the findings emphasize the importance of updating the knowledge of post-graduates or those in practice.
Journal of Ayurveda and integrative medicine 04/2012; 3(2):59-62.
-
[show abstract]
[hide abstract]
ABSTRACT: There are many and varied types of trauma. The extent to which trauma influences the mental health of an individual depends on the nature of trauma, as well as on the individual's coping capabilities. Often trauma is followed by depression, anxiety, and PTSD. As the pharmacological remedies for these conditions often have undesirable side-effects, nonpharmacological remedies are thought of as a possible add-on treatment. Yoga is one such mind-body intervention. This paper covers eleven studies indexed in PubMed, in which mental health disorders resulting from trauma were managed through yoga including meditation. The aim was to evaluate the use of yoga in managing trauma-related depression, anxiety, PTSD and physiological stress following exposure to natural calamities, war, interpersonal violence, and incarceration in a correctional facility. An attempt has also been made to explore possible mechanisms underlying benefits seen. As most of these studies were not done on persons exposed to trauma that had practiced yoga, this is a definite area for further research.
Depression research and treatment 01/2012; 2012:401513.
-
[show abstract]
[hide abstract]
ABSTRACT: Neuroticism, or negative affectivity, can influence a person's approach to life. This study examined levels of neuroticism in 249 patients with illnesses known to be related to the mental state. All of them were given a six-day intensive yoga program. Patients showed a decrease in neuroticism measured by the PGI Health Questionnaire. The reduction was maximum for (a) those with ages between 36 and 51 years, (b) females, (c) patients with at least 17 years of education, and (d) those who were self-employed. The results show the importance of socio-demographic factors in neuroticism levels and in programs intended to reduce neuroticism. Hence, yoga is a useful intervention to reduce traits of neuroticism, with variations in the degree of change based on social factors.
Journal of cultural diversity 01/2012; 19(4):118-23.
-
[show abstract]
[hide abstract]
ABSTRACT: Practicing yoga has been shown to improve motor functions and attention. Though attention is required for fine motor and discrimination tasks, the effect of yoga breathing techniques on fine motor skills and visual discrimination has not been assessed.
To study the effect of yoga breathing techniques on finger dexterity and visual discrimination.
The present study consisted of one hundred and forty subjects who had enrolled for stress management. They were randomly divided into two groups, one group practiced high frequency yoga breathing while the other group practiced breath awareness. High frequency yoga breathing (kapalabhati, breath rate 1.0 Hz) and breath awareness are two yoga practices which improve attention. The immediate effect of high frequency yoga breathing and breath awareness (i) were assessed on the performance on the O'Connor finger dexterity task and (ii) (in) a shape and size discrimination task.
There was a significant improvement in the finger dexterity task by 19% after kapalabhati and 9% after breath awareness (P<0.001 in both cases, repeated measures ANOVA and post-hoc analyses). There was a significant reduction (P<0.001) in error (41% after kapalabhati and 21% after breath awareness) as well as time taken to complete the shape and size discrimination test (15% after kapalabhati and 15% after breath awareness; P<0.001) was also observed.
Both kapalabahati and breath awareness can improve fine motor skills and visual discrimination, with a greater magnitude of change after kapalabhati.
International Journal of Yoga 01/2012; 5(1):37-41.
-
Medical science monitor: international medical journal of experimental and clinical research 12/2011; 18(1):LE3-4. · 1.70 Impact Factor
-
[show abstract]
[hide abstract]
ABSTRACT: The aim of the present study was to compare the attitude toward complementary and alternative medicine (CAM) of primary care physicians trained in conventional medicine with CAM physicians whose training was for a comparable duration. The CAM physicians included practitioners of Ayurveda, homeopathy, and naturopathy.
Two hundred and ninety five (295) physicians with aged 20-60 (group mean±standard deviation, 48.2-12.3 years, 87 females) participated. Eighty-six (86) of them were trained in Ayurveda, 90 in homeopathy, 82 in conventional medicine, and 37 in naturopathy. They were attending a 4-day residential program on Indian culture. All of them gave their signed consent to take part in the study, and the institution's ethics committee approved the study.
The study was a cross-sectional survey. Since the participants had self-selected to join for the program on Indian culture, the sampling could be considered as convenience sampling.
The number of conventionally trained and CAM physicians were similar in number and in their reasons for selecting CAM treatments.
Conventionally trained and CAM physicians were comparably likely to prescribe CAM treatments for their patients. Their reasons for prescribing CAM treatments appeared to be (1) the idea that CAM treatments deal with the cause, and (2) a belief in the treatments. A limiting factor of the survey is that it did not determine whether the belief was based on evidence or on faith alone.
Journal of alternative and complementary medicine (New York, N.Y.) 11/2011; 17(11):1069-73. · 1.69 Impact Factor
-
Medical science monitor: international medical journal of experimental and clinical research 08/2011; 17(9):LE7-8. · 1.70 Impact Factor
-
[show abstract]
[hide abstract]
ABSTRACT: Prior research has shown that methods of meditation, breath control, and different kinds of yoga breathing affect attention and visual perception, including decreasing the size of certain optical illusions. Evaluating relationships sheds light on the perceptual and cognitive changes induced by yoga and related methods, and the locus of the effects. In the present study, the degree of optical illusion was assessed using Müller-Lyer stimuli before and immediately after two different kinds of practice, a high frequency yoga breathing called kapalabhati, and breath awareness. A nonyoga, control session tested for practice effects. Thirty participants (with group M age = 26.9 yr., SD = 5.7) practiced the two techniques for 18 min. on two separate days. The control group had 15 nonyoga practitioners assessed before and after 18 min. in which they did not perform any specific activity but were seated and relaxed. After both kapalabhati and breath awareness there was a significant decrease in the degree of optical illusion. The possibility that this was due to a practice or repetition effect was ruled out when 15 nonyoga practitioners showed no change in the degree of illusion when retested after 18 min. The changes were interpreted as due to changes in perception related to the way the stimuli were judged.
Perceptual and Motor Skills 06/2011; 112(3):981-90. · 0.49 Impact Factor
-
Indian Journal of Palliative Care 05/2011; 17(2):169-70.
-
[show abstract]
[hide abstract]
ABSTRACT: Pre and post comparison after one minute of high frequency yoga breathing (HFYB) suggested that the HFYB modifies the autonomic status by increasing sympathetic modulation, but its effect during the practice was not assessed.
Thirty-eight male volunteers with group average age ± S.D., 23.3 ± 4.4 years were each assessed on two separate days in two sessions, (i) HFYB and (ii) breath awareness. Each session was for 35 minutes, with 3 periods, i.e., pre (5 minutes), during HFYB or breath awareness (15 minutes) and post (5 minutes).
There was a significant decrease in NN50, pNN50 and the mean RR interval during and after HFYB and after breath awareness, compared to the respective 'pre' values (p < 0.05) (repeated measures ANOVA followed by post-hoc analysis). The LF power increased and HF power decreased during and after breath awareness and LF/HF ratio increased after breath awareness (p < 0.05).
The results suggest that there was reduced parasympathetic modulation during and after HFYB and increased sympathetic modulation with reduced parasympathetic modulation during and after breath awareness.
BioPsychoSocial Medicine 01/2011; 5:4.
-
[show abstract]
[hide abstract]
ABSTRACT: Previous studies have shown that yoga practice improved the hand grip strength in patients with rheumatoid arthritis (RA).
Sixty-four participants with RA (group average age ± S.D., 46.5 ± 9.6 years; 47 females) were assessed at the beginning and end of a one week yoga program. The Stanford Health Assessment Questionnaire (HAQ), hand grip strength, rheumatoid factor, and C-reactive protein levels were assessed on the first and last day and compared using a t-test for paired data. All participants showed reduced disability scores of the HAQ and rheumatoid factor levels, with an increase in bilateral hand grip strength in male participants alone.
This single group study indicated that a brief intensive yoga program was beneficial in RA, with decreased disability, better functionality and changes in the rheumatoid factor levels suggesting improvement.
BMC Research Notes 01/2011; 4:118.
-
[show abstract]
[hide abstract]
ABSTRACT: Meditation and attention are considered associated in different ways. For example, contemporary concepts state that to meditate, a practitioner has either to (i) focus attention on the object of meditation (FA) or (ii) maintain vigilance and disengage their attention consciously from all distracters (OM). The Indian sage Patanjali (circa 900 B.C.), mentioned that there are two stages of meditation, which differ subtly from the descriptions of FA and OM. One stage is called dharana, or focusing attention on the object of meditation. Another stage is called dhyana, during which all thoughts remain effortlessly directed to the object of meditation, excluding all other thoughts. Vigilance and attention are not required during dhyana, which is the actual phase of meditation. In a previous study, participants who practiced dharana performed better in a task for selective attention than those who practiced dhyana. Brainstem auditory evoked potential changes during the two states differed. Descriptions of yoga practices from ancient texts can give added insights about meditation and attention, supported by objective assessments.
Perceptual and Motor Skills 12/2010; 111(3):918-20. · 0.49 Impact Factor
-
Medical science monitor: international medical journal of experimental and clinical research 10/2010; 16(10):LE15. · 1.70 Impact Factor
