Yoga Effects on Heart Rate Variability and Electroencephalography

Not Applicable

Completed

• Conditions: Health Behavior; Quality of Life
• Interventions: Behavioral: 1 month respiratory training; Behavioral: 1 month waiting period

• Registration Number: NCT01866683
• Lead Sponsor: University of Sao Paulo

Brief Summary

Since yoga breathing exercises are traditionally used to tranquilize the mind, and have a well-known positive effect on the cardiovascular system, it is our hypothesis that a respiratory yoga exercise named bhastrika pranayama may have positive effects on heart rate variability, electroencephalography, quality of life and salivary cortisol (stress hormone).

Detailed Description

The effects of yoga interventions on heart rate variability have been previously shown in our laboratory, having its efficacy in improving autonomic heart modulation of hypertensives and elderly subjets proven. However, there is a lack of data addressing the effects of such interventions on EEG patterns of health fit male subjects, as well as there are no study investigating if there is a relationship between heart autonomic modulation changes and EEG patterns. Thus, the aim of this study was to investigate the effects of 1 month respiratory yoga training on heart rate variability, EEG, salivary cortisol and quality of life of health fit male subjets.

Basic Information
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Recruitment & Eligibility
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Study & Design
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Trial Locations

Study Timeline

• Study Start: 2013-01
• Study First Submitted: 2013-05-23
• Study First Submitted QC: 2013-05-28
• Study First Posted: 2013-05-31
• Primary Completion: 2014-03
• Study Completion: 2014-03
• Status Verified: 2015-06
• Last Update Submitted: 2015-06-11
• Last Update Posted: 2015-06-15

Recruitment & Eligibility

• Status: COMPLETED
• Sex: Male
• Target Recruitment: 30

Inclusion Criteria

• Young adults;
• Physically fit (engaged in physical activity at least 2-3 times a week);
• Non athletes;
• Possibility to follow protocol agenda.

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Exclusion Criteria

• Epileptic events in previous 5 years;
• Chronic allergic rhinitis, with airway occlusion;
• Oral bronchodilator usage;
• Beta blocker user;
• Any diagnosed cardiac rhythm alteration at rest;
• Cerebral dysrhythmia;
• Previous training in respiratory yoga exercises.

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Study & Design

• Study Type: INTERVENTIONAL
• Study Design: CROSSOVER

Arm && Interventions

Group	Intervention	Description
Group 2	1 month respiratory training	1 month waiting period
Group 2	1 month waiting period	1 month waiting period
Group 1	1 month waiting period	1 month respiratory training
Group 1	1 month respiratory training	1 month respiratory training

Primary Outcome Measures

Name	Time	Method
Changes from baseline electroencephalography measures of brain waves at 1 and 2 months	baseline, one month, two months	64 active electrodes electroencephalography

Secondary Outcome Measures

Name	Time	Method
quality of life	study entry, one month, two months	quality of life will be addressed by the World Health Organization Questionaire of Quality of Life in its brief form
frequency domain heart rate variability	study entry, one month, two months	R-R interval autoregressive spectral analysis
salivary cortisol	study entry, one month, two months

Trial Locations

Locations (1)

Universidade Federal do Rio Grande do Norte - UFRN; 🇧🇷 Natal, Rio Grande do Norte, Brazil