• Korean Journal of Psychosomatic Medicine
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• v.31 no.2
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• pp.149-154
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• 2023

Objectives : Far-infrared (FIR) lights have been investigated for sleep quality intervention. We sought to measure the advantageous effects of FIR in sleep using polysomnographic data as the objective outcomes. Methods : The ten healthy volunteers were enrolled in a single-center, prospective, patient-blind, single-arm trial. Individuals slept on a sham mattress and a FIR emitting mattress with polysomnography for one night each. Results : Sleep efficiency showed an increasing trend but was not statistically significant. PSQI-K significantly decreased (p=0.013). The latency to REM of the baseline was shorter than that of the intervention (p=0.008). Though there was no statistical significance, Stage N1 and N2 were shortened, and Stage N3 was prolonged after the intervention compared to the baseline. Conclusions : The FIR-emitting mattresses improved sleep quality on self-reported insomnia. We suggested the candidate for the markers altered by the FIR therapy, such as the normalization of REM latency and increased N3 sleep.

• Proceedings of the Korean Institute of Interior Design Conference
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• 2008.05a
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• pp.27-31
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• 2008

The increasing interest in environment-friendly products brought the new so-called 'health furnitures. 'Recently health-friendly-furnitures have gained a larger share in the furniture market, but the method of making health furnitures is still stuck in the primitive stage. For example, a bed with a stone or ceramic plate is one of the most famous health furniture to date. It needs a design fairly different from an ordinary bed that uses a mattress, but there has been little development on how different it would be. Therefore the purpose of this study is to develop a new design for a newly designed stone bed to make it n)ore competitive in the market. Its basic concept is to make an high-tech but human friendly bed. It should be natural and minimal, and it should have a royal grace on it. We worked on how to maximize every requirement and applied on it. Lastly, we had an eco-friendly final touch on our new bed with environment-friendly natural lacquer, so it could discharge volatile organic compounds such as formaldehyde as little as possible.