Already described are the adverse effects of mid-upright sitting →
Derived from these findings are the Requirements for remediating these effects to optimise the biomechanics of prolonged sitting in the upright seated mode:-
The obvious, and perhaps only, solution was for prolonged work to be performed in a chair that has a stable, correctly supported, supine reclined mode. Shown here is the Okamura ‘Atlas’ chair.
The 2TILT (2T, 3M) CONCEPT.
An optimal system that effectively fully remediates all the adverse effects that have been enumerated. Any chair can be compared to it for establishing it’s ergonomic efficiency. An essential tool for chair design. See ☛ 2T CONCEPT a full solution→
The concept is derived from consideration of spinal anatomy, pathology, biomechanics and testing as already described. Each of the possible remediations (above) are found to be incorporated.
An office work-station is easily derived from the 2Tilt (now 2M) chair concept and now renamed the ‘TriModal’ (3M) concept as a sit/stand component is incorporated. See☛workstations→
And 4M OFFICE WORK-STATION when a ‘stand’ mode is incorporated/
“Sit/stand desks and pelvic support, semi reclined seating in the UK have yet to become part of the normal office landscape. When they do there will be several million office workers that will be grateful to be free from daily debilitating pain.” John Jukes, 2001.