Short-Term Effects of Heart Rate Variability Biofeedback on Working Memory

Area of Science:

• Psychophysiology
• Neuroscience
• Cognitive Psychology

Background:

• Long-term heart rate variability biofeedback (HRVB) is known to impact psychophysiological responses.
• The neurovisceral integration model posits a relationship between heart rate variability (HRV) and cognitive function.
• Understanding the acute effects of HRVB is crucial for its therapeutic applications.

Purpose of the Study:

• To investigate the short-term effects of a single HRVB session on cognitive performance and affective state.
• To examine the influence of paced breathing exercise in conjunction with HRVB.
• To explore the mediating role of cardiac vagal tone in HRVB-induced changes.

Main Methods:

• A randomized controlled trial with 38 participants was conducted.
• Participants were assigned to either a paced breathing intervention group or a spontaneous breathing control group.
• Measures included working memory (N-back task), cardiac vagal tone (HRV), and self-reported affective states (attentiveness, fatigue, serenity).

Main Results:

• Participants in the HRVB group showed enhanced working memory performance.
• Significant improvements in self-reported serenity and attentiveness were observed post-HRVB session.
• Mediation analysis indicated that improvements were not significantly influenced by changes in cardiac vagal tone.

Conclusions:

• A single HRVB session can acutely enhance cognitive functions like working memory and improve affective states.
• The immediate benefits of HRVB may not be solely mediated by alterations in cardiac vagal tone.
• These findings support further research into the acute application of HRVB for cognitive enhancement.