In:
Journal of Integrative Cardiology Open Access, Science Repository OU
Abstract:
Purpose: Light is an important environmental stimulus influencing everyday life. However, information
about the impact of coloured light on the autonomic nervous system (ANS) is sparse. In general, red light (RL) is thought to act as an adrenergic trigger, while there is evidence that blue light (BL) induces
parasympathetic activation. This is a pilot study to find out, if RL and/or BL affects heart rate variability (HRV).
Methods: Participants were randomly exposed first to neutral light (NL) and then to RL and BL for 120 minutes in a special light cabin. During each test run, HRV measurements were performed using both wrist
training computers and Holter-ECGs. Furthermore, heart rate, arrhythmias and blood pressure were analysed. All parameters were measured during neutral and repeated during RL or BL in 10 supraventricular
tachycardia patients, in 10 patients with heart failure and 10 athletes. Results: During exposure to both RL and BL an increase of blood pressure, improvements of several HRV
parameters, but no significant change of heart rate was observed. Neither RL nor BL influenced the occurrence of ectopic beats in Holter ECGs. The most prominent improvement of HRV was found in
athletes, whereas increase in blood pressure were comparable between all three groups. Conclusion: RL and BL influence the cardiac ANS. Since no differences were found between different
light scenarios, the changes can not solely be attributed to the two-sided model of sympathetic and parasympathetic effects of ANS. However, RL and BL could potentially be used therapeutically to influence
HRV in athletes.
Type of Medium:
Online Resource
ISSN:
2674-2489
,
2674-2489
DOI:
10.31487/j.JICOA.2020.04.06
Language:
Unknown
Publisher:
Science Repository OU
Publication Date:
2020
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