A Randomized Controlled Trial of Heart Rate Variability Biofeedback Explores Cardiac Autonomic Control as a...

Area of Science:

• Psychophysiology
• Cognitive Neuroscience
• Behavioral Medicine

Background:

• Cardiac autonomic regulation is linked to cognitive and social cognition.
• Heart rate variability biofeedback (HRVB) reduces stress but its impact on social cognition, especially theory of mind (ToM), is unclear.
• Understanding the psychophysiological mechanisms is crucial for developing targeted interventions.

Purpose of the Study:

• To examine the effects of a six-session HRVB intervention on social cognition and executive functions in young adults with high stress.
• To explore if HRVB-induced cardiac autonomic activity changes mediate improvements in social cognition beyond executive functions.

Main Methods:

• Randomized controlled trial with HRVB and a control group.
• Intervention involved preset-paced breathing biofeedback over six sessions.
• Assessed changes in heart rate, respiratory rate, perceived stress, cardiac autonomic activity, ToM, and executive functions.

Main Results:

• HRVB intervention significantly reduced heart rate, respiratory rate, and perceived stress.
• Participants in the HRVB group showed increased parasympathetic and decreased sympathetic activity.
• Significant improvements in ToM and executive functions were observed in the HRVB group compared to controls.
• Cardiac autonomic activity changes mediated improvements in overall ToM, with sympathetic activity specifically mediating cognitive ToM.

Conclusions:

• HRVB intervention effectively modulates cardiac autonomic activity, leading to enhanced social-cognitive function, particularly ToM.
• HRVB-induced changes in cardiac autonomic activity offer a psychophysiological mechanism for improving ToM, independent of executive function.
• HRVB shows promise as an intervention for enhancing social cognition in stress-vulnerable populations.