What is the role of sleep in the life of a developer? We'll look at the importance of sleep and the obstacles preventing devs from getting enough of it.
Consider the stereotype of the elite programmer. Maybe you see someone sitting in front of a bank of monitors, staring at full-screen terminals, in a dimly lit bedroom, at 3am, slamming down Mountain Dew from a 7-Eleven Big Gulp while pounding furiously at a keyboard.
What’s reality? Is the caffeine-fueled, elite “hacker” mindset an efficient way to code? How does this person stack against the science of sleep? Let’s talk about sleep.
To operate at an elite level for our bodies, we need to understand the role of sleep in life. Sleep is something that we all engage in regularly, yet many of us learn very little about it and what it really does to the body and mind. We’ll begin to understand sleep (and the cost of ignoring it) by looking at it through the lens of a totally different profession, the practice of medicine.
Would you like a drunk doctor to operate on you? Of course not! How about a doctor who is still awake after working for more than 24 hours straight? Maybe that doesn’t seem so bad until you learn that the two hypothetical doctors could be functioning at the same mental alertness level.
Unfortunately, at least in many U.S. hospital systems, medical residence programs have new doctors working in some of these more extreme environments. These tired doctors make medical errors that can lead to the deaths of patients. This is likely a factor in why medical errors are the third leading cause of death in the U.S. (behind heart attacks and cancer).
Who can we thank for this terrible statistic? The healthcare system is full of problems, but the extreme working hours of new doctors stem from William Halsted, MD, from his time at Johns Hopkins Hospital. Halsted trained new surgical doctors and pushed them to their wakeful limits in pursuit of their craft. This practice spread in other programs until it became normal for residents (so named because they essentially lived at a hospital) to work excessive hours.
Halsted was able to foist this kind of behavior on new doctors since he seemed to require no sleep and was the model of a brilliant doctor doing amazing work. Sadly, history reveals that Halsted was secretly a cocaine addict that was using his highs to stimulate himself to alertness. Today, many doctors are pushed beyond reasonable limits, to the cost of public good, because of a drug addict who dramatically impacted the history of an entire profession.
Lack of sleep impacts the ability of doctors to do their jobs and can impact software developers from working at elite levels too, but our profession is not driven to sleeplessness by a cocaine addict from more than 100 years ago. It can be so hard to get a good night of sleep. Why? Let’s look at elements that hinder many developers from some good shut-eye.
The most commonly used stimulant in the world is no stranger to developers. The trouble with caffeine is that its effects last far longer than we might anticipate.
Caffeine works by interfering with adenosine receptors in the brain. Adenosine is a protein that accumulates in our brains while we’re awake. When adenosine is able to do its job, the elevated levels late in the day cause you to get drowsy and want to sleep. Since caffeine blocks adenosine, the presence of the stimulant in your body can prevent easy sleep.
The bad news is that caffeine has a long half life of 3 to 7 hours for an average adult. In other words, a late afternoon cup of coffee at 3pm will still have half the caffeine left in you at around 8pm. That caffeine is going to keep you up.
Sadly (for this coffee lover, at least), the best option for getting better sleep if you’re consuming too much caffeine is to cut back or cut off the later part of the day entirely.
We are biologically wired for increased wakefulness with light around. When an excess of light is present, the brain delays the release of melatonin which is a critical component in triggering the onset of sleep. The modern world is surrounded with artificial light at night that can hinder your ability to sleep.
It’s not only light that can impact your sleep. The color of the light matters! Studies show that blue light has a stronger suppressing effect on melatonin release than other light colors. This was less of a problem when incandescent bulbs dominated, however, the rise of LED lights increases the amount of blue that we experience at night. LED “white” is really just equal parts of RGB (Red, Green, and Blue). If you are using a computer at night to code without some filtering on the blue spectrum, then nighttime light may be holding you back from better sleep.
In many of the health surveys that I sent to DC area developers, individuals reported they are stressed by work. A taxing work environment can be a negative feedback loop on your sleep health. Stress and mental anxiety about work can lead to sleeplessness. Fatigue from lack of sleep can make completing work tasks more difficult or time consuming. The cycle can perpetuate.
How do we get so much work?
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