Since the 19th century, normal body temperature meant 98.6 degrees Fahrenheit (37 ° C). This number was given by a German physician Carl Reinhold August Wunderlich, after examining millions of readings taken from 25,000 German patients. Later, US doctors. UU. And Europe repeated the same experiment and their results were similar. After which, it was universally accepted as the normal temperature of the human body.
However, according to the new study by Stanford University researchers, the normal body temperature of the human being was reduced by 0.03 degrees Celsius and 0.29 degrees Celsius per decade, for men and women, respectively. This means that the body temperature of today’s men is 0.59 degrees Celsius lower than that of men born in the early nineteenth century and for women, it has decreased by 0.32 degrees Celsius from the 1890s until today.
Julie Parsonnet, a professor of medicine at the university and her team analyzed 677,000 temperature readings, collected from 190,000 people, between 1862 and 2017 before reaching this conclusion. According to the researchers, the temperature drop could be influenced by several factors, such as the change in height, weight, lifestyle and availability of the best medical facility.
In addition to this, Parsonnet also contributed to the development of treatment for infectious diseases such as tuberculosis, syphilis, periodontal disease, dysentery, general inflammation, behind the change in normal body temperature. However, researchers do not recommend updating the standard for all people.
The truth about the normal range of body temperature
Body temperature is not the same for everyone and varies by sex, age and other factors. For a typical adult, the body temperature can be between 97 F to 99 F. For babies and children, the number varies from 97.9 F to 100.4 F. In addition, our body temperature does not remain the same all day. It even varies throughout our lives. Some things that can cause a change in your temperature during the day are:
-Level of physical activity
-Time of the day
-What you’ve eaten or drunk
-For women, it changes even when they are menstruating.
In addition, the temperature even varies according to the measure: forehead, armpits, mouth. The reading taken from under the arms and mouth shows a different number. When a person has a fever, body temperature is higher than the normal range.