How should I sit while typing for long hours?

For 4+ hour sessions:

1. Adjust chair height so thighs are parallel to floor.
2. Use a chair with armrests that support elbows without raising shoulders.
3. Keyboard tray (negative tilt: front edge lower than back) keeps wrists straight.
4. Use a footrest if feet don't reach floor.
5. Position monitor 20-30 inches away, top of screen at eye level.
6. Use document holder beside monitor (not flat on desk) to avoid neck twisting.
7. Take a 2-minute break every 30 minutes: stand, stretch wrists, roll shoulders.
8. Alternate sitting and standing (height-adjustable desk).
9. Use software like Workrave to enforce breaks.

Poor posture leads to RSI, carpal tunnel, and back pain – which will lower your long-term typing speed permanently. Invest in ergonomics.