Effects of Yoga on Heart Rate Variability and Mood in Women
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|ClinicalTrials.gov Identifier: NCT02153385|
Recruitment Status : Completed
First Posted : June 3, 2014
Last Update Posted : June 4, 2014
Background: Women are more likely to suffer from depression and anxiety, which have been linked to reduced heart rate variability (HRV) and increased cardiovascular morbidity and mortality. The purpose of this study was to examine the effects of an 8-week yoga program on HRV and mood in generally healthy women. The investigators hypothesized that there would be improvements in HRV and reductions in perceived stress and symptoms of depression and anxiety after the yoga intervention.
Methods: Fifty-two healthy women were randomized to either a yoga group or a control group. Participants in the yoga group completed an 8-week yoga program, which comprised a 60-minute session, twice a week. Each session consisted of breathing exercises, yoga pose practice, and supine meditation/relaxation. Participants' HRV, perceived stress, depressive symptoms, and state and trait anxiety were assessed at baseline and week 9.
|Condition or disease||Intervention/treatment||Phase|
|Heart Rate Variability||Other: Yoga||Not Applicable|
|Study Type :||Interventional (Clinical Trial)|
|Actual Enrollment :||52 participants|
|Intervention Model:||Parallel Assignment|
|Masking:||None (Open Label)|
|Official Title:||Effects of Yoga on Heart Rate Variability and Mood in Women: A Randomized Controlled Trial|
|Study Start Date :||September 2010|
|Actual Primary Completion Date :||June 2011|
|Actual Study Completion Date :||June 2011|
Experimental: Yoga group
Two yoga sessions per week for 8 weeks
Yoga program was 60 min per session, twice per week for 8 weeks. Led by an experienced yoga instructor.
No Intervention: Control group
Usual level of physical activity; no involvement in any yoga practice during the course of the study
- Change from baseline in heart rate variability at week 9 [ Time Frame: The ourcome measure was assessed at baseline and at week 9 ]Heart rate variability analysis was derived from continuous heart rate recording, at a sampling rate of 1024 Hz, using an electrocardiogram (ECG) system (MP 150, BIOPAC Systems, Goleta, CA, USA). Participants were instructed to avoid exercise one day before the assessment session and abstain from caffeinated food and beverages on the day of assessment. During the assessment, participants were instructed to relax in a supine position with no other tasks or stimulation for 20 minutes while the ECG was recording. The last 10 minutes of the ECG recording was analyzed for HRV. R-R intervals were computed and the HRV power spectrum was obtained via a fast Fourier transformation algorithm using an appropriate software program (HRV Analysis for Windows, version 1.1; Biosignal Imaging Group and Analysis, the University of Kuopio, Kuopio, Finland).
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT02153385
|Kaohsiung Medical University|
|Kaohsiung, Taiwan, 807|
|Principal Investigator:||I-Hua Chu, PhD||Kaohsiung Medical University|