Nowadays, people spend less time outdoors during the day and don’t get enough light during the day. Staying up late at night and being exposed to bright light again. A study believes that exposure to strong light at night is not only prone to obesity, but also prone to cardiovascular disease.
Research shows that under normal circumstances, if there is more light during the day and dark at night, it is beneficial to the body’s energy consumption and maintain a high sleep metabolic rate. Conversely, sleep metabolic rate decreases.
At the same time, the study also found that skin temperature changes day and night with the intensity of light. Under normal circumstances, during the day, the sympathetic nervous system is excited, the blood vessels are constricted, and the skin temperature is low. When the light gradually dims after 18 o’clock, the skin temperature also increases, which is related to the excitation of the parasympathetic nervous system and the dilation of blood vessels.
Although the study did not measure blood pressure directly, vasoconstriction and lower skin temperature during the day indicated an increase in blood pressure, while vasodilation and increased skin temperature at night indicated a decrease in blood pressure. This diurnal fluctuation in blood pressure is beneficial for cardiovascular health.
A new study says that optimizing indoor lighting conditions to more closely resemble the diurnal variation of natural light may prevent diseases such as obesity and diabetes.
Therefore, the researchers stress that maintaining a natural light rhythm is beneficial for preventing obesity and diabetes.