Normal body temperature is 36℃~37℃ (underarm). Dr. Tokushima Ishihara, a Japanese natural health expert, proposed a more precise range: the ideal body temperature is 36.5℃ ~ 36.8℃. Body temperature fluctuates slightly within 24 hours, with the lowest at 2-6 am and the highest at 1~6 pm, and the fluctuation generally does not exceed 1℃.
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Constant body temperature allows us to live at different temperatures, but different people's body temperatures are slightly different. Children's body temperature is slightly higher, reaching 36.8℃ ~ 37℃; Babies and the elderly have lower body temperatures. Especially for premature infants, their body temperature is easily influenced by the environment because of the imperfect development of thermoregulation mechanism.
The average body temperature of women is about 0.3℃ higher than that of men, and it will change with the change of menstrual cycle. Normal women's basal body temperature takes ovulation day as the dividing point, showing a state of low before and high after, also known as "biphasic body temperature". There is little progesterone before ovulation, and the body temperature is generally 36.2℃. After ovulation, the body temperature rises sharply by 0.3℃~0.6℃, which makes the basal body temperature rise to about 36.7℃.
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