Fixing Forward Head Posture
You may wonder why a site dedicated to mice and keyboards is discussing neck posture. The human body operates as a closed kinetic chain. If your head is thrust forward, your upper back rounds, your shoulders internally rotate, and the nerves that supply your arms (the brachial plexus) become compressed. You cannot fix wrist pain if the nerves are being pinched at the neck.
The Mechanics of Forward Head Posture
The average human head weighs roughly 10 to 12 pounds. When balanced perfectly atop the cervical spine, this weight is easily managed. However, for every inch you lean your head forward to look closer at a monitor, the relative weight of the head on the cervical spine increases by 10 pounds. Leaning just three inches forward forces your neck muscles to hold up a 40-pound load. This causes the suboccipital muscles to spasm and the upper trapezius to lock up.
The Chin Tuck Maneuver
The most effective exercise to combat this is the Chin Tuck. Sit up straight. Without tilting your head up or down, pull your entire head straight back horizontally, as if you are trying to make a double chin. You should feel a stretch at the base of your skull and a contraction in the deep neck flexors at the front of your throat. Hold this retracted position for 5 seconds, then release. Repeat 10 times.
Environmental Fixes
Exercises will fail if your environment forces you back into bad posture. Ensure your monitor is an arm's length away, and the top third is at eye level. Most importantly, increase your operating system's UI scaling or text size. If you are leaning forward because you cannot read 10pt font on a 4K monitor, no amount of stretching will save your neck.