Key result
Paced respirations at the abdominal level with an identical inhaling and exhaling ratio using a wearable biofeedback device significantly decreased sympathetic arousal and increased parasympathetic activities.
Why the study?
Does a wearable respiratory biofeedback system based on a generalized BSN platform accurately monitor vital signs and effectively modulate autonomic nervous system activity in healthy subjects?
Does a wearable respiratory biofeedback system based on a generalized BSN platform accurately monitor vital signs and effectively modulate autonomic nervous system activity in healthy subjects?
p-value: p=<0.05
A novel wearable respiratory biofeedback system based on a generalized body sensor network accurately monitors vital signs and demonstrates that paced abdominal breathing with a 1:1 inhale/exhale ratio effectively modulates autonomic nervous system activity.
Hypothesis-generating for wearable biofeedback in healthy subjects; leaves open translation to clinical autonomic disorders.
Wearable medical devices have enabled unobtrusive monitoring of vital signs and emerging biofeedback services in a pervasive manner. This article describes a wearable respiratory biofeedback system based on a generalized body sensor network (BSN) platform. The compact BSN platform was tailored for the strong requirements of overall system optimizations. A waist-worn biofeedback device was designed using the BSN. Extensive bench tests have shown that the generalized BSN worked as intended. In-situ experiments with 22 subjects indicated that the biofeedback device was discreet, easy to wear, and capable of offering wearable respiratory trainings. Pilot studies on wearable training patterns and resultant heart rate variability suggested that paced respirations at abdominal level and with identical inhaling/exhaling ratio were more appropriate for decreasing sympathetic arousal and increasing parasympathetic activities.
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Liu et al. (2011) studied Healthy (n=22). Wearable respiratory biofeedback system vs. Natural breathing or breathing without biofeedback was evaluated on Heart rate variability (LF/HF ratio) (p=<0.05). Paced respirations at the abdominal level with an identical inhaling and exhaling ratio using a wearable biofeedback device significantly decreased sympathetic arousal and increased parasympathetic activities.
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