“Ergonomics” is the scientific discipline concerned with the understanding of interactions among humans and other elements of a system in order to optimize human well-being and overall system performance. At its simplest definition, ergonomics literally means the science of work. The most immediate application of ergonomics is body dynamics—or, being aware of your physical position in relation to the world around you and knowing how to execute yourself most effectively.
As I go about my busy day—lugging a heavy backpack, sitting in class, typing at the computer—it’s easy to forget that by back is working at least as hard as my brain. While I may be able to get away with it now, the continued twisting, twerking, and tensing really adds up. A staggering 80% of the population will suffer from back pain, and those most affected are the 30-50 year olds. If I don’t want the most productive years of my life to be stunted by spinal strain, I’d better start protecting my posture now.
They key is to preserve the natural S curve of the spine as much as possible. Here are some specific ways to promote good posture:
Typing at the computer: Sit high enough to keep a minimum 90 degree bend in the arm; your wrists should not be higher than your elbows. Get up and stretch every once in awhile. Flex your hands and arms opposite of the typing position, and rotate your wrists and neck.
Carrying a bag: Only carry what you really need, and try to balance the weight as much as possible. Backpacks should be worn with both straps on. If carrying a bag with only one strap, switch shoulders periodically.
Driving in the car: Move car seat forward until you have a 90 degree bend at the knees, keeping them level with the hips. You should be within easy reach of the steering wheel.
Sleeping: Maintain alignment by sleeping on your back with a pillow under the knees, or on your side with a pillow between the knees.
Lifting: Keep feet firmly planted at shoulder width, bend knees, and tighten your abdominals. Use the strength of your legs to do the lifting. Keep the weight of the object as close to your body as possible—lifting a 20 lb bag 20 inches away from your body produces 400 lbs of compression force on your spinal disc fulcrum point. Also, it’s better to push than to pull.
Standing around: Alternate position by shifting your weight from one leg to the other.
Physical alignment promotes mental alignment. Back it up!
Special thanks to Julia Jensen with UCSD Environmental Health & Safety
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