Sleep stage and skin temperature regulation during night‐sleep in winter

Kubo, Hiroko; Yanase, Takuko; Akagi, Hiroko

doi:10.1046/j.1440-1819.1999.00503.x

Cited by 9 publications

(3 citation statements)

References 2 publications

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“…The average difference between daytime and nighttime skin temperatures was 3.47 ± 2.17°F. This is consistent with findings that skin temperature increases by 7.2°F (winter) and 5.4°F (summer) during sleep [24]. …”

Section: Resultssupporting

confidence: 93%

Digital Health: Tracking Physiomes and Activity Using Wearable Biosensors Reveals Useful Health-Related Information

et al. 2017

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A new wave of portable biosensors allows frequent measurement of health-related physiology. We investigated the use of these devices to monitor human physiological changes during various activities and their role in managing health and diagnosing and analyzing disease. By recording over 250,000 daily measurements for up to 43 individuals, we found personalized circadian differences in physiological parameters, replicating previous physiological findings. Interestingly, we found striking changes in particular environments, such as airline flights (decreased peripheral capillary oxygen saturation [SpO2] and increased radiation exposure). These events are associated with physiological macro-phenotypes such as fatigue, providing a strong association between reduced pressure/oxygen and fatigue on high-altitude flights. Importantly, we combined biosensor information with frequent medical measurements and made two important observations: First, wearable devices were useful in identification of early signs of Lyme disease and inflammatory responses; we used this information to develop a personalized, activity-based normalization framework to identify abnormal physiological signals from longitudinal data for facile disease detection. Second, wearables distinguish physiological differences between insulin-sensitive and -resistant individuals. Overall, these results indicate that portable biosensors provide useful information for monitoring personal activities and physiology and are likely to play an important role in managing health and enabling affordable health care access to groups traditionally limited by socioeconomic class or remote geography.

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Section: Resultssupporting

confidence: 93%

Digital Health: Tracking Physiomes and Activity Using Wearable Biosensors Reveals Useful Health-Related Information

et al. 2017

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“…A repeated measures design (within-subject design, as the same subjects were repeat-measured in three different conditions) was applied which allowed fewer subjects and the more efficient offset of individual differences. Also consistent with other similar studies reported on sleep [22][23][24], the number of subjects used ranged from 4 to 8 in our investigations. Thus, eight subjects (four males and four females) were selected here.…”

Section: Experimental Designsupporting

confidence: 91%

Investigation of Gender Differences in Sleeping Comfort at Different Environmental Temperatures

Pan

Lian

Lan

2011

Indoor and Built Environment

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The purpose of this investigation was to determine whether there is gender difference in sleep comfort of healthy individuals at various temperatures. During winter, sleep quality was examined under different indoor temperatures (17, 20 and 23°C) using questionnaires and electroencephalogram (EEG). To explore the mechanism responsible for gender differences in comfortable sleeping temperatures, mean skin temperature, finger temperature and finger blood flow were measured. The results showed that females would prefer a higher ambient temperature during sleep than the men. The mean skin temperature for females was higher than that of males, whereas finger skin temperature and finger blood flow were significantly lower in females than in males. Furthermore, skin temperature and finger blood flow were more sensitive to ambient temperature with females than in males. The gender differences in preferred sleeping temperature could therefore be related to these physiological characteristics. Both subjective evaluations and EEG found better sleep quality in males under the same temperatures compared to females. Skin temperature changes over the course of the night also demonstrated longer periods of deep sleep in males compared to females.

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“…1998), or displayed as raw data on hourly time scales (Brown 1979; Kräuchi et al . 2000; Kubo et al . 1999).…”

Section: Introductionmentioning

confidence: 99%

Acute finger temperature changes preceding sleep onsets over a 45‐h period

Lack

Gradisar

2002

Journal of Sleep Research

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SUMMARY A resurgence in the field of sleep initiation and thermoregulation has seen a number of investigators reporting relatively gradual increases in distal skin temperatures of the hands and feet prior to sleep onset at typical bedtimes. The present study extends upon prior knowledge by investigating whether: (1) this is a change of distal skin temperature triggered specifically by the attempt to fall asleep and (2) whether this relationship holds for various phases of the circadian rhythm whenever sleep is attempted. Fourteen healthy good sleepers participated in a modified 45‐h constant routine (CR) with multiple sleep onset latency tests (MSLT) conducted every half hour. After a brief decrease of finger temperature associated with small postural adjustments at the beginning of each sleep latency test, finger temperature showed rapid (0.8 °C min−1) increases of 1–3 °C leading up to the onset of sleep. This rapid increase of finger temperature was relatively consistent across the 45‐h CR, despite very significant circadian variation of the pre‐MSLT baseline finger temperature and homeostatic decrease of sleep latency.

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Sleep stage and skin temperature regulation during night‐sleep in winter

Cited by 9 publications

References 2 publications

Digital Health: Tracking Physiomes and Activity Using Wearable Biosensors Reveals Useful Health-Related Information

Digital Health: Tracking Physiomes and Activity Using Wearable Biosensors Reveals Useful Health-Related Information

Investigation of Gender Differences in Sleeping Comfort at Different Environmental Temperatures

Acute finger temperature changes preceding sleep onsets over a 45‐h period

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