Introduction: The accumulation of fatigue and stress creates problems, including reductions in quality of life and productivity.
Objectives: To investigate the effects of a far-infrared heater that heats the feet with ceramic balls on autonomic nervous activity and mood states.
Methods: This study was performed as a crossover trial. Participants comprised 20 women. On different days, each participant underwent 15 min of foot warming with the far-infrared heater (far-infrared group) or remained seated for 15 min (control group). Autonomic nervous activity (low-frequency component/high-frequency component, high-frequency) and mood states scales (Profile of Mood States Second Edition and Two-Dimensional Mood Scale for Self-monitoring and Self-regulation of Momentary Mood States) during the study intervention were measured and compared between groups.
Results: Low-frequency/high-frequency was significantly higher in the control group 10 min after the start of intervention than at baseline ( = .033). Low-frequency/high-frequency was significantly lower in the far-infrared group than in the control group at 5 min ( = .027), 10 min ( = .011), and 15 min ( = .015). High-frequency was significantly higher in the far-infrared group at 5 min ( = .008), 10 min ( = .004), and 15 min ( = .015) than at baseline. High-frequency 5 min after the start of intervention was significantly higher in the far-infrared group than in the control group ( = .033). POMS2 scores improved significantly more in the far-infrared group than in the control group, including in fatigue-inertia ( = .019), tension-anxiety ( = .025), and total mood disturbance ( = .019). Finally, the far-infrared group showed greater improvements in Two-Dimensional Mood Scale-Short Term scores such as stability ( = .002) and pleasure ( = .013).
Conclusion: Using the far-infrared heater to heat the feet with ceramic balls stabilized and improved mood, reduced Fatigue-Inertia and Tension-Anxiety, and alleviated total mood disturbance. Parasympathetic nervous system activation was observed from 5 min after the start of heating, suggesting that short-duration heat stimulation of the feet is effective.
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| http://dx.doi.org/10.1177/00368504231158452 | DOI Listing |
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