Exposure to blue light from the screen technology such as computers, laptops or mobile phones are known to interfere with sleep at night. But if you are exposed to blue light in the morning, it can be beneficial both in reducing stress levels throughout the day.
Researchers Rensselaer Polytechnic Institute in New York conducted a study of 18 adolescents who slept only 4.5 hours for 3 consecutive nights. Participants were divided into two groups that will be given two treatments, the first group asked to see the blue light and the other group was asked to see natural light dimmed.
As a result, adolescents who woke up with blue light had higher levels of stress hormones (cortisol), which is almost two times higher than the teens who awoke with a dim natural light.
The hormone cortisol may be known as a bad hormones, such as stress, promote weight loss, and even increase the risk of heart disease. But rising to the top of the hormone cortisol in the morning to reset the body's circadian rhythms.
"It is also likely to be the reason why one should avoid blue light at night, because the production of the hormone melatonin, which regulates sleep may be disturbed by the hormone cortisol and cause a person to stay awake," said Mariana Figueiro, PhD, who led the study, as reported by prevention, Friday (09/11/2012).
Previous research has shown that people with high levels of cortisol in the morning, feel more energized through the day. The surge of cortisol in the morning seems to be warming to the body in order to be ready to face the tensions that will occur throughout the day.
The body takes about 45 minutes to pump cortisol so that you can feel the effect. As soon as you wake up, read the digital newspaper on your laptop, tablet computer, or your smart phone near the window before exercising. Blue light from electronic equipment can make you more ready to spend the day and avoid stress.
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