Computers play a central role in many of our daily activities, whether we’re at school, work or home. Considering the amount of time we spend sitting in front of the screen, it is important to consider ergonomic computer options.
Ergonomics is the science of shaping our workplace and home environments to fit the needs of the human body. Making your computer space body-friendly requires more than just a certain type of computer; you must consider the keyboard setup, desk and chair you use as well.
According to OSHA, the following specifications must be facilitated by your computer space in order for it to be considered ergonomic:
Screen at or just below eye level
Neck in line with torso and head centered
Shoulders relaxed
Elbows close to body and supported on arm rests
Wrists and hands aligned with forearms
Adequate space allowed for keyboard and mouse
Lumbar support
Feet flat on the floor
Traditionally, it is also considered ergonomic to have 90 degree angles at the hip between the upper and lower body, the knee between the thigh and calf and the elbow between the upper and lower arm.
Computers and Keyboards
When choosing a computer, the desktop has one clear advantage over the laptop: separate keyboard. This allows the monitor to be set higher than the keyboard and in line with the eyes, encouraging the head and neck to stay aligned.
Laptops are becoming more adjustable, though. Separate keyboards can be purchased for laptops, although this does conflict with the laptop’s main advantages, which are compactness and portability. There are also laptop stands that allow you to open the computer wide, positioning the screen significantly higher than the keyboard. This has the drawback of requiring a number of other adjustments; with the keyboard more vertical, you will need to recline your seat way back in order to keep your wrists aligned with the forearms as well as a 90 degree angle between the upper and lower arm. This reclined position would also cause need for a wedged footrest.
A laptop called the DreamCom 10 has been designed with the capacity to elevate its screen, which would be the best option for making laptops ergonomic. The DreamCom 10 is not available on the market yet, though.
Laptops with wrist rests in front of the keyboard space encourage you to maintain wrist and forearm alignment, reducing the risk of wrist injuries like carpal tunnel syndrome.
Desks
It is important to have a desk that allows the keyboard and monitor of a desktop computer to be set at different levels. There may be a keyboard tray that pulls in and out or a separate level to the desk. Desks should be adjustable to tailor appropriate monitor and keyboard height.
Even an adjustable ergonomic desk may end up being too high for you. Using a footrest will ensure that you can maintain proper angling of joints and reduce stress to the hips and knees.
Some people have begun using standing desks while at work to alleviate the stresses and strains of prolonged sitting. These desks have similar ergonomic considerations as sitting desks, but only for the upper body.
Chairs
Ergonomic chairs are fit with adjustable seat height, adjustable back rest angle, adjustable arm rest height and a lumbar support, preferably one whose position is adjustable. The material ergonomic chair are made out of also matters; it should not be too soft to support your joints or so firm that it causes excess pressure on them.
For those who can’t afford a pricey ergonomic chair or who just want to try something new, sitting on an exercise ball has gained popularity in the office and at home. Balancing on the ball requires core engagement, which both encourages optimum posture and gives you a low-grade core workout.
Kneeling chairs are also available. These include a knee rest and seat for your buttocks. Kneeling chairs create an obtuse angle between your upper and lower body, which can decrease the pressure on your lower back and the tension in your hips. As with any position, it is still necessary to move around from time to time, as the kneeling chair does put pressure on the knees.
Paying attention to OSHA’s guidelines and being aware of what is available can help free you of sitting back pain when on the computer. Whether at work or home, you can tailor your environment to suit the needs of your body.
April 18th, 2012
AmeeL 