Studies on the Relationship Between Core Body Temperature Measured by an Ingestible Capsule Sensor and Daily Living Activities with Special Reference to Exercise, Bath and Sleep / 日本温泉気候物理医学会雑誌

In recent times, an ingestible capsule sensor for the measurement of core body temperature has become available. This equipment was used to measure the relationship between core body temperature and daily living activities such as eating, exercise and bathing etc.<br>The main findings were as followings:<br>1. With respect to daily living activities, the core body temperature during bathing showed higher values in comparison with eating and light-grade exercise etc.<br>2. For the same-grade of exercise (HRmax60%) either in an environmentally controlled room at either constant temperature (25°C) and humidity (50%) or in water (36°C; 50%humidity), the core body temperature showed almost identical changes for peak value and the rise and fall ever time.<br>3. Atypical work at midnight was associated with a continuous decrease in core body temperature.<br>4. Atypical sleep in the daytime was associated with a continuous decrease in core body temperature.<br>5. For daily living activities inducing an increase in core body temperature, the correlation coefficient between core body temperature and heart beats/min was 0.87 (p<0.01).

Suggested Effects of Warm Deep Sea Bathing on Daylight Sleep and Relaxation in Night Shift Workers / 日本温泉気候物理医学会雑誌

In order to investigate the effects of deep sea water bathing on relaxation and daylight sleep in night shift workers, electroencephalography, circulatory and cardiac autonomic functionings, visual evoked potential, biochemical markers in urine and saliva, core body temperature, sleep questionnaires, and mood state questionnaires were evaluated in nine subjects to compare with other three kinds of bathing including sham (no water), tap water and surface sea water. Deep sea water bathing showed better subjective sleep latency for sleep questionnaire (p<0.1) and significantly better vigor status for mood questionnaire (p<0.01) between four kinds of bathing. With regard to the objective data, despite the biggest increase in temperature of eardrum in deep sea water bathing, the highest sleep efficiency and the shortest wake period during sleep in electroencephalography did not reach to the significant level.

Psycho-physiologic Effects of Deep Sea Water Bathing / 日本温泉気候物理医学会雑誌

In order to investigate effects of deep sea water bathing on psycho-physiological status, body temperature, circulatory and autonomic nervous system functions, and questionnaires on refreshment and sleep were evaluated in comparison with other 3 kinds of bathing including sham (no water), surface sea water and tap water. The skin temperatures of both tights and lower back were significantly higher for only deep sea water bathing compared with the sham bathing. It was also the case for tympanic temperature. Concerning circularly and autonomic nervous functions there were no significant difference between 4 kinds of bathing. For refreshment and sleep quality both sea water bathing showed higher scores, but not consistently significant differences. However, when taking any kind of bath shorter sleep latency was related to higher cardiac parasympathetic activity during sleep.