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I spent about 18 hours in the car this past weekend driving to a friend's wedding and back. That's a lot of sitting, or so my back and legs reminded me the few times I got out of the car between long stretches on the road. Given this long trip, I was glad at least to have a comfortable car seat - I couldn't imagine sitting for so long otherwise.
That got me thinking about my office chair. I don't want to think about how many hours a week I spend sitting down at work; and I'm sure countless others who work in an office can say the same. If comfort and ergonomics are important design factors for my car seat, how much more so for my desk chair!
For traditional chairs, long-term sitting comfort depends on a number of factors. The seat dimensions should be long enough to allow the occupant's feet to touch the floor, with legs at a 90 degree angle. The depth and width should be enough to allow resting against the back, but leaving a few inches between the back of the knees and the seat. The backrest should cover most of the occupant's back and should curve in support of the lumbar region, which is the curved area of the lower spine that bears most of the body's weight.
Traditional office chairs aren't the only way to go, however. There are a number of unique ergonomic alternatives that claim health, fitness, or comfort benefits.
Kneeling chairs are chairs that require the user to sit in a modified kneeling position. A seat (often with no back) is tipped forward and the person's knees rest on a pad in front. This design allows weight to be distributed between the lower back and knees. These chairs encourage good posture by sliding the hips forward, aligning the back shoulders and neck.
Saddle chairs are designed in the shape of a saddle, and to an adjustable height to allow the user to rest his legs in a more extended position closer to standing. The result is similar to a position of someone riding a horse. Like kneeling chairs, saddle chairs are often useful for people with lower back issues, and reduces the slouching and circulation issues caused by regular chairs.
Exercise balls are another alternative, and are my favorite simply because they encourage the most activity. Sitting on an exercise ball requires the user to maintain balance, exercising leg muscles as you sit. The movement helps circulation and reduces fatigue caused from extended periods of stationary sitting. Some exercise balls even come with attachments for wheels or back rests.
There are a number of other office chair alternatives, many of them specialized for specific health needs. But no matter how comfortable a seat can be made, the fact remains that it's not good for people to sit all day. So if 8 hours a day at a desk is your lot in life, the best thing you can do (and I'm mostly preaching to myself) is take regular standing and stretching breaks.
I have not used any of the ergonomic alternatives I mentioned above for an extended period of time, so I can't personally vouch for any of them over a standard computer chair. What about you? What office chair(s) do you use and find most comfortable?
Sources:
Spine-health.com - Office Chairs
Apple.com - Seating
Smartfurniture.com - Posture and Productivity
Images from smartfurniture.com, apple.com, posture-chair.co.uk, and gearfire.net
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