Stop Guessing Your Chair Tension: The Physics of Zero-Gravity Lumbar Support
Why does your $1,500 Herman Miller or Steelcase still leave your lower back throbbing after four hours of deep work? You bought top-tier ergonomics, set the seat height according to the manual, yet your L4-L5 vertebrae feel like they are trapped in a hydraulic press. The problem isn’t the chair; it’s your blind calibration of … Read more