Every ergonomics principle agrees on one rule for repetitive work: bring the work to you, not the other way around.
Surgeons have rotating tables. Watchmakers have spinning workstations. Mechanics have lifts that raise the engine to eye level. Even dentists position the patient — not themselves.
But puzzlers? We sit at flat, stationary tables. Then we twist, reach, and lean — sometimes for hours — to access pieces that should be coming to us.
That isn't bad posture. That's a design flaw.
Every time you reach across a 24-inch puzzle, you're holding a sustained twist in your spine. Your shoulders rotate forward. Your lower back compresses on one side. Multiply that by hundreds of reaches per session, and the soreness isn't a mystery — it's inevitable.