Blue Light can Disrupt Your Body Clock
For the past few decades, scientists have been investigating whether artificial light, particularly blue light can have a negative impact on human health.
According to psychologist Lora Wu from Massey University, artificial light is messing with our bodies, when we expect the light-dark cycle. Our body is in line with natural day and night light and even those changes during winter time have an impact on our overall health. Dr. Wu said:
“We’ve got a master clock in our brain, which is set by light exposure to the eye. And every organ and cell in your body has an internal clock as well…If your master clock is not in sync with your various internal clocks, it can lead to circadian desynchrony, which has huge health effects.”
The conflicting signals between your body clock can lead to changes in your behavior and physiology, and it can affect your metabolism and mood. For example, shift workers often need to eat and sleep at odd times and they are usually prime candidates for circadian desynchrony.
According to Dr. Wu, humans find it very hard to adapt to these disruptions in sleep, with one exception:
“Sometimes people think if you’re a permanent shift worker, you can essentially flip your clock and then be awake and working at night and asleep during the day. But the only place where that’s been demonstrated is in offshore oil rigs.”
We would need more proof on why offshore oil rigs workers can handle a night shift. Also, how blue light which is emitted during the night hours impacts those who sleep less during the night and spend too much time on their phones and tablets.
You probably heard that too much screen time in the evening is bad for you and it is true that blue light from devices like tablets and phones can disturb your sleep. The full impact of artificial lights is still unknown to us.
While we are on the topic of how light from our devices affects us, let’s talk about how any screen time (at any given time) affects our vision. As you can assume, there is no good news when it comes to the correlation between our vision and the time spent on our computers, laptops, tablets, and phones.
If you buy a child an iPad for Christmas, you will possibly doom him for a lifetime of short-sightedness. Recently, we are blaming social media and devices for everything from the feeling of loneliness and obesity to serious mental health issues and physical impact of sitting for too long and staring at your screen. Moreover, a recently published study reported a “digital myopia” among children found that a child’s risk of myopia (short-sightedness) is higher by 3% for each hour they spent playing computer games.
Let’s find a better idea for a present this Christmas. Remember, we can have full control of what we choose to do in our spare time and how do we spend our time with or without our devices.
How Fast Can You Walk?
Researchers showed that the quicker your pace, the better your health. Moreover, cardiac surgeons proposed using the speed of your walk as the identifier of patients that might have some difficulties recovering from surgery.
There’s also evidence that slower pace can be the indication of some health issues, such as cognitive impairments and cardiovascular disease. Researchers are also trying to find out what is the impact of exercise on breast cancer survivors.
The idea is that the sicker someone is, they are going to lose strength and the ability to move, especially, if they didn’t exercise that much before.
How fast you can walk also says a lot about a person’s biological age, which may be older or younger than their chronological age. The goal is not to start walking faster but to pay attention to how active you are and how fast you can walk. If you slow down significantly, it could be an indication of an underlying condition. Although, taking a walk and exercising at least twice a week is never a bad idea.