Showing posts with label Mice. Show all posts
Showing posts with label Mice. Show all posts

Tuesday, October 2, 2007

The Ultimate Guide to Workstation Ergonomics: 10 Easy Tips

HR World published a great "top 10" list yesterday with some tips on how to optimize your workstation. We thought we'd pass them along.

Here's to your continued productivity!



If you're like most people, you spend a good portion of your waking hours sitting at a desk or working with a computer. This time can become painful — and even unbearable — if you don't take steps to properly set up your workstation to work with your body and not against it.

Creating an ergonomic workstation is easier than you might think, and the payoff can be huge. These tips and resources can get you on the path to making your workstation more ergonomic and maybe even more productive.
Tips

1. Work Area: When setting up a work area, make sure that the space is large enough for you to spread out comfortably and allows for a full range of motion, which can be a special concern for those with especially long limbs. You should also leave plenty of room to arrange the items you use most frequently in such a way that there is no strain for you to reach them.

2. Laptops: When using a laptop, it's best to use it while it's on a table rather than on your lap. If you use it frequently, you might be better served by using a separate keyboard and mouse rather than using the built-in keyboard and touch pad to reduce strain on your wrists and hands.

3. Keyboard: If you spend a lot of your workday typing, where you place your keyboard and how you use it can greatly affect your risk for getting RSIs (repetitive stress injuries) like carpal tunnel syndrome. Your keyboard should be placed so that your arms are parallel to your thighs. If your desk doesn't allow for this, try getting a keyboard tray. You'll also want to do your best to use good typing techniques, keeping your wrists elevated and not hitting the keys too hard.

4. Mouse: When setting up your desk, make sure to keep your mouse easily within reach and try not to grip it too tightly, as doing so can strain the muscles in your hand. If you find that using a mouse bothers you too much, try using an alternate input device like a trackball or a touch pad.

5. Desk: There is no one-size-fits-all desk, so choose one that is right for you. You can help reduce your chance of injury by getting a document holder, arranging your electronics within your reach and making sure that the area underneath your desk remains uncluttered.

6. Chair: A good chair can do wonders, as sitting is much harder on your back than it might appear to be. Make sure to keep your lower back supported, and adjust your chair so that you can easily reach your keyboard and mouse. If this means raising the chair so that your feet don't quite reach the floor, get a footrest to help keep your feet from dangling.

7. Monitor: Improperly configured monitors can cause a great deal of eyestrain, resulting in headaches and difficulty concentrating. Center your monitor in front of you at a comfortable distance, and adjust the brightness settings so that it’s easy on your eyes. Make sure to take breaks from staring at your screen, too. Glare can be a problem as well, and if you can't seem to eliminate it, use a glass glare filter.

8. Lighting: Common office lighting can often create a great deal of eyestrain by making your computer monitor difficult to see. Adjust your shades or lights as much as you can to reduce glare, and position your monitor at such an angle to light sources that reflection is reduced. It can be helpful to keep overhead lights dimmed and use a desk lamp for close work.

9. Work Habits: You can arrange your work habits so that you don't put undue stress on any part of your body. Make sure to take frequent breaks, get up and walk around, and change positions frequently so that repetitive tasks and static work won't take their tolls.

10. Phone: It can be tempting to multitask and cradle your phone receiver between your neck and shoulder. However, this should be avoided, as it can create a great deal of strain in your neck muscles. If you need to have your hands free, try using a headset or put the call on speakerphone.

Friday, July 27, 2007

Beware of... Mouse?

When someone mentions "safe mousing," it's almost amusing. "How in the world can someone injure himself using a mouse?!"

Believe it or not, the thousands of clicks you perform in a normal day can cause significant damage to your arm, wrist and shoulder. Repetitive Strain Injuries (RSI) such as Carpal Tunnel Syndrome are a very real threat to most information workers. As part of our ongoing effort to help you achieve maximum effectiveness at work, here are 10 tips to avoid the stiffness and soreness that foreshadow an RSI.

10 Tips for Safer Mousing

1. Mouse Grip - don't squeeze or grip the mouse between your thumb & pinky. Your hand should be relaxed, not tensed when using the mouse.

2. Mouse Size - hands come in different sizes just like feet. Choosing a mouse that fits your hand will help you work with an open, relaxed hand posture.

3. Mouse with the Arm - don't twist your wrist side-to-side while mousing. Move the mouse with the whole arm, using the elbow as a pivot point and keeping your wrist in a straight, neutral position.

4. Mouse Position -

  • Awkward Positions: Body postures determine which joints and muscles are used in an activity, as well as the amount of force exerted. Poor postures place unusual or excessive forces on components of the body. The number one problem with pointing devices has always been location. In the best of circumstances, pointing devices are placed just to the right of the keyboard, and at worst, they are placed on a side surface or on the surface in front of the user because there isn't room on the keyboard tray.
  • Effect of Mouse Position on Shoulder Muscle Activity:
    The location of the pointing device during use, (in relation to the body's midline) affects EMG muscle activity for the anterior and middle deltoid muscles. (Cook and Kothiyal, 1998). EMG activity increases as the mousing area is moved farther from the body's midline, as shown by the research performed by Alan Hedge and Greg Shaw at Cornell University. They measured EMG activity in relation to the shoulder abduction angle required by the placement of the pointing device. Note how much muscle activity is present at 50 degrees shoulder abduction. This mousing position, (just to the right of the keyboard) would be considered a best case scenario for most users.
  • Effect of Differing Shoulder Widths:
    Computer users come in all sizes. A man that is 6 foot 5 inches tall, with a large bone structure could measure 28" through the shoulders, while a 5 foot tall, petite woman might be only 15" through the shoulders. In the Cornell research, when the mouse was positioned just to the right of the keyboard, the test subject's shoulder abduction was at 50 degrees. The 6" 5" man with a 28" shoulder width might have only been at 40 degrees abduction for the same position. The strain on his shoulder is reduced because of his size. On the other hand, the 5" petite woman with a 15" shoulder width might have a 60 degree abduction with the same mouse position. Her size will cause her to be at even greater risk of injury.

5. Avoid Restricting Circulation - there are exposed blood vessels near the skin at the wrist, where the pulse is taken. You don't want any pressure to this region, as it will reduce circulation into the hand, increasing the risk of injury.

6. Don't use a Wrist Rest - research has shown that using a wrist rest doubles the pressure inside the carpal tunnel, and it acts as a partial tourniquet reducing critical circulation. Also, you can't "Mouse with the Arm" and use a wrist rest at the same time.

7. Mouse Settings - adjust the speed and acceleration for your mouse. By making this adjustment, you will be able to reduce the amount of arm/hand movement needed to get from one side to the monitor screen to the other. To adjust these settings, do the following:

  • Open the Control Panel.
  • Double Click on the "Mouse" icon.
  • Click on the "Motion" tab.
  • In the box that says "Speed," change the speed from the default 25%, to 75%.
  • In the box that says "Acceleration" change from "None" to "Low" or "Medium"
  • Click "Apply" to test out the new settings. Adjust them more if necessary. Click "OK".

8. Mousing Height - adjust the height of the mouse so your wrist is straight while mousing. The top of your hand should not be bent back toward your body while mousing.

9. Mouse Designs - consider using a mouse that is designed to support the weight of the arm and hand while mousing. This reduces the strain to the neck and shoulders, and is actually essential if you don't have
Proper Forearm Supports to use.
o The
Quill Mouse (Offered in right and left-handed models) Best pointing device we've seen to date.
o The
Contour Mouse (4 right-hand sizes, 3 left-hand sizes)
o The
Renaissance Mouse (2 right-hand sizes)
o The
Whale Mouse (adjustable size, non-handed)
o The
Easy Cat GlidePoint Mouse (non-handed)

10. Load Sharing - consider alternating between the left and right hand to reduce the workload and strain on the one hand. This can be done using a non-handed mouse like the
Whale Mouse, or the Roller Mouse, or by using a Dual Mouse Adapter and a Left-handed mouse. Another option for mousing with both hands is to use a keyboard with a centralized pointing device like:
o The
Northgate Evolution Keyboard with Glidepoint Mouse.
o The
Pro Curve Keyboard with Glidepoint Mouse.