Changes in heart rate during feedback control of respiration

Area of Science:

• Physiology
• Behavioral Science
• Biofeedback

Background:

• Heart rate variability is influenced by respiratory patterns.
• Biofeedback techniques offer potential for voluntary physiological control.

Purpose of the Study:

• To investigate the efficacy of respiratory biofeedback versus respiratory instructions alone in modulating heart rate.
• To compare the effects of feedback on increasing versus decreasing heart rate.

Main Methods:

• Participants were assigned to one of eight conditions involving practice to alter heart rate or respiration rate, with or without feedback/instructions.
• Heart rate, respiration rate, and respiration depth were measured.
• Statistical analysis compared physiological changes across conditions.

Main Results:

• Respiratory feedback enabled reliable increases and decreases in heart rate.
• Respiratory instructions alone facilitated heart rate increase but not decrease.
• Heart rate modulation was significantly greater in respiratory feedback groups.

Conclusions:

• Respiratory biofeedback is a reliable method for both increasing and decreasing heart rate.
• The presence of feedback significantly enhances the ability to control heart rate through respiration.
• These findings support the use of respiratory biofeedback for cardiovascular regulation training.