Therefore, the proper hand position is essential to ward off health problems. MedilinePlus.Gov reports that carpal tunnel syndrome is estimated to affect 1 to 5 percent of adults annually, with the incidence of CTS and repetitive injury rising, with 1-3 cases per 1000 subjects yearly.Īlthough cubital tunnel syndrome is less seen than carpal tunnel syndrome, it has risen, especially among computer users. When you bend the elbow often, the ulnar nerve gets irritated or compressed inside your elbow. Pressure on a nerve in your wrist leads to tingling, numbness, and pain throughout the palm, caused by wrist overuse. Problemĭamage to muscles, tendons, or nerves is caused by repetitive motions such as typing, moving the mouse, writing, etc. ![]() The American Academy of Orthopaedic Surgeons points out that RSI, carpal tunnel syndrome (CTS), and cubital tunnel syndrome are more familiar to users with poor typing practice. Anatomy of the carpal tunnel (Source: Wikimedia) Poor typing and posture can lead to many problems, including repetitive strain injury (RSI) of muscles and tendons. Most computer users make the mistake of incorrectly resting their hands on the keyboard, affecting their productivity and health. In short, yes! A correct hand position will be a game-changer when it comes to typing. What is the Correct Hand Position for Typing?.If you liked this post, feel free to follow me on Twitter, or check out any of my other posts. Instead, looking at an average to above average typist, we can see that their fingers would travel no more than 1.5 miles in a day. We’d have to write all of “A Tale of Two Cities” in a single day for us to hit a total travel distance of 12 miles. Let me know if you’re willing to let me install a key logger on your computer so I can get a more accurate number □. So, it seems reasonable to assume that, in practice, an individual might type 45K lines a day or 120K (15K x 8 hours) lines a day assuming they don’t take any breaks or have any interruptions. On average, English words contain five characters per word hence the 250 strokes / min assumption. This article argues that we all type much less than we think, while providing a nice upper limit for testing. In this characters dictionary, we defining a mapping between characters and the straight line distance to their origin keys on the home row (measured in cm on the Apple Magic Keyboard). So, in order to be accurate, I should only count the distance to and from Shift when the input changes from upper to lower case. You’d naturally press the Shift key at the start of the word COOL and release your finger only at the end when there are no more uppercase characters to type. If you’re using Shift, you’ll encounter a similar problem. So instead of counting a finger’s distance to the key and then the distance back to its origination location, the distance back should only be included if the new character differs from the previous one. It’s likely they’d keep it there and just press the key twice. Typically, a user typing cool wouldn’t bring their finger back to the home row after typing the first o. ![]() Additionally, we’d also add the straight line distance returning from t back to f.Īlthough it seemed reasonable at first, I realized we would have to deal with a few more edge cases. ![]() In contrast, if they typed t, we would add the straight line distance from the center of the f key to the center of the t key. Taking the image above as an example, if the letter f was typed, no straight line distance would be travelled. Then, the final typing distance would simply be calculated as the sum of these values. ![]() The algorithm would simply measure how far a finger moves from its original location (in centimeters) on the home row.
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