caa a22 4500 606203710 CHVBK 20210128100959.0 cr unu---uuuuu 210128e20150901xx s 000 0 eng 10.1007/s10484-015-9291-z doi (NATIONALLICENCE)springer-10.1007/s10484-015-9291-z Yoga for Heart Rate Variability: A Systematic Review and Meta-analysis of Randomized Clinical Trials [Elektronische Daten] [Paul Posadzki, Adrian Kuzdzal, Myeong Lee, Edzard Ernst] The objective of this systematic review is to summarize and critically assess the effects of yoga on heart rate variability (HRV). Nine databases were searched from their inceptions to June 2014. We included randomized clinical trials (RCTs) comparing yoga against any type of control intervention in healthy individuals or patients with any medical condition. Risk of bias was assessed using the Cochrane criteria. Two reviewers performed the selection of studies, data extraction, and quality assessments independent of one another. Fourteen trials met the inclusion criteria. Only two of them were of acceptable methodological quality. Ten RCTs reported favourable effects of yoga on various domains of HRV, whereas nine of them failed to do so. One RCT did not report between-group comparisons. The meta-analysis (MA) of two trials did not show favourable effects of yoga compared to usual care on E:I ratio (n=61, SMDs=0.63; 95% CIs [−0.72 to 1.99], p=0.36; heterogeneity: r2=0.79, χ 2=5.48, df=1, (p=0.02); I2=82%). The MA also failed to show statistically significant differences between the groups regarding the 30:15 ratio (n=61, SMDs=0.20; 95% CIs [−0.43 to 0.84], p=0.53; heterogeneity: r2=0.07, χ 2=1.45, df=1, (p=0.23); I2=31%). The data from the remaining RCTs were too heterogeneous for pooling. These results provide no convincing evidence for the effectiveness of yoga in modulating HRV in patients or healthy subjects. Future investigations in this area should overcome the multiple methodological weaknesses of the previous research. Springer Science+Business Media New York, 2015 Heart rate variability nationallicence Complementary and alternative medicine nationallicence Yoga nationallicence Systematic review nationallicence Effectiveness nationallicence Posadzki Paul University of Plymouth, Plymouth, UK aut Kuzdzal Adrian Centre for Innovative Research in Medical and Natural Sciences, Rzeszow University, Rzeszow, Poland aut Lee Myeong Korea Institute of Oriental Medicine, Daejeon, South Korea aut Ernst Edzard University of Exeter, Exeter, UK aut Applied Psychophysiology and Biofeedback Springer US; http://www.springer-ny.com 40/3(2015-09-01), 239-249 1090-0586 40:3<239 2015 40 10484 https://doi.org/10.1007/s10484-015-9291-z text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 review-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10484-015-9291-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Posadzki Paul University of Plymouth, Plymouth, UK aut NATIONALLICENCE 700 1- Kuzdzal Adrian Centre for Innovative Research in Medical and Natural Sciences, Rzeszow University, Rzeszow, Poland aut NATIONALLICENCE 700 1- Lee Myeong Korea Institute of Oriental Medicine, Daejeon, South Korea aut NATIONALLICENCE 700 1- Ernst Edzard University of Exeter, Exeter, UK aut NATIONALLICENCE 773 0- Applied Psychophysiology and Biofeedback Springer US; http://www.springer-ny.com 40/3(2015-09-01), 239-249 1090-0586 40:3<239 2015 40 10484