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Completed

NCT Number: NCT01866683

Yoga Effects on Heart Rate Variability and Electroencephalography

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).

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Key information

Conditions

Health Behavior Behavior Quality of Life

Age range

25 year–45 year

Sex eligibility

Male

Study type

Interventional

Phase

Not applicable

Primary location

Universidade Federal do Rio Grande do Norte - UFRN

Natal, Rio Grande do Norte, 59078-970, Brazil

About this study

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.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

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

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.

Treatment and study plan

1 month respiratory training

Behavioral

Bhastrika yoga respiratory training: 30 kapalabhati and 1 surya bedhana form 1 bhastrika

1 month waiting period

Behavioral

waiting or detraining period

Primary outcomes

  1. Changes from baseline electroencephalography measures of brain waves at 1 and 2 months

    Time frame: baseline, one month, two months

    64 active electrodes electroencephalography

Secondary outcomes

  1. frequency domain heart rate variability

    Time frame: study entry, one month, two months

    R-R interval autoregressive spectral analysis

  2. salivary cortisol

    Time frame: study entry, one month, two months

  3. quality of life

    Time frame: 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

Sponsors and collaborators

Lead sponsor

University of Sao Paulo

Other

Collaborators

  • Conselho Nacional de Desenvolvimento Científico e Tecnológico

Registry information

Official study title

Effects of Yoga on Heart Rate Variability, Electroencephalography, Quality of Life and Salivary Cortisol of Healthy Adult Subjets

Important dates

Study start
2013
Primary completion
2014
Study completion
2014
First posted
May 31, 2013
Registry last updated
Jun 15, 2015

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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