Computer Keyboard Hand Pain, Year 2020 (Left Forearm Hurts)

By Xah Lee. Date: . Last updated: .

Left Forearm Hurts

My left forearm hurts. Repetitive Strain Injury due to typing. Had this vague pain since 2018 and is still ongoing (as of 2020-05-29). There is a specific spot that hurts. The spot is near the left elbow, about 1/4th down the length of forearm from elbow, and west position in the cross section circle of the forearm.

xah rsi 20201117
Xah Repetitive Strain Injury 20201117

Never was able to pinpoint the exact cause. But i suspect it's pressing the key 3 too much (that's the key roughly above e on QWERTY layout. ). In xah fly keys, that key does unsplit window, which is very frequently used.

2020-05-29 I think now am sure, that my vague upper forearm pain in past 3 years, is due to two keys too much. One is the 3 key, pressed with my middle finger, to unsplit emacs panes (delete-other-windows) , the other is using pinky to press CapsLock too much. The capslock is used for xah-fly-command-mode-activate in Emacs: Xah Fly Keys 📦 .

I know they are the cause, because when the pinky pushes capslock, or the index finger presses 3, the muscle moves in the spot of pain. I can feel the muscle move by placing my right hand fingers on the pain spot. When key 3 is pressed, the spot is center of the pain spot. When key CapsLock is pressed, the spot is a bit off center of the pain spot.


There are 2 solutions.

  1. Change keybinding for those frequently used commands, so that i do not have to press 3 or capslock much.
  2. Change the way i press those keys. Instead of moving finger, try not move finger. Imagine the fingers are immovable like cast iron, move whole hand instead.

Added new keys so unsplit window. Fix my RSI that's killing my left hand.

(defun xah-xfk-add ()
    "addon for `xah-fly-command-mode-activate-hook'
Version 2020-04-09"
       ;; the first element of cons cell is dvorak key
       ("3" . nil )
       ("4" . nil )
       ("-" . delete-other-windows)
       ("\\" . split-window-below)
       ("]" . delete-other-windows)
       ("[" . split-window-below ))))

Xah Talk Show 2020-12-02 emacs Sentence Lines, my RSI, Microsoft Sculpt Keyboard, Function Keys

My RSI problems
Xah Talk Show 2020-12-02 emacs Sentence Lines, my RSI, Microsoft Sculpt Keyboard, Function Keys

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