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  • This work is intended as a resource for the design of work chairs.  (The SCIENCE).  
  • It represents some essential reading  for designers of ergonomic chairs (→DESIGNERS)
  • and manufacturers of retail office chairs (→MANUFACTURERS) if they wish to improve the ‘ergonomics’ of their models with overwhelming health selling points.  
  • Office managers should consult this blog as a resource (→For OFFICE MANAGERS).
  • It is also very relevant to Interior designers and architects involved with office design (→For ARCHITECTS. ‘Coolness’ is the word).
  • Not forgetting the ‘end user’ who has the ultimate benefit (→Backache and GENERAL USERS).


Screen Shot 2017-05-22 at 17.39.34The evidence identified adverse effects which occur with conventional prolonged mid-upright sitting that required remediation.  

  • Axial compression (by gravity).
  • Flexion at the vulnerable spinal joints.
  • A combination of the above.
  • A full remediation can only be achieved in a relaxed, reclined  position that avoids all the adverse effects of prolonged upright sitting.  This conclusion became validated  by independent work using pMRI scanning (Smith 2007).   This confirmed the 2Tilt (3M) concept. (Reclined mode→).
  • To remediation
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In practice a reclined mode for prolonged work demands:-

  1. For prolonged work, a fully supportive reclined mode→
  2. An upright mode for certain short tasks.
  3. An easy transition mode, preferably unstable for additional health benefits. UPRIGHT MODE & TRANSITION

Screen Shot 2018-07-05 at 17.25.47Screen Shot 2016-03-18 at 19.28.20This involves a number of requirements.   To be effective these are detailed in the  (→The 2 TILT CONCEPT.).    Although originally considered outlandish, recently design is at last moving in this direction and the 2T concept will inevitably and logically move into the mainstream of chair design.

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Supporting and related posts are shown in each of the above categories.

screen-shot-2016-09-29-at-16-29-38 Some essential reading  for designers of ergonomic chairs and retail office chairs if they wish to improve the ‘ergonomics’ of their models with overwhelming health selling points.     Chair designers still lose out, often having familiarity bias in recognising the underlying bio-mechanical essentials for a chair that will supersede the existing ‘cool’ models. ☛ Chair DESIGNERS & Low Lumbar BackacheOhmae

Screen Shot 2016-05-17 at 15.59.14Screen Shot 2018-06-03 at 13.26.07For MANUFACTURERS of retail office chairs new ideas can create both threats and opportunities.
Manufacturers can be reassured that feasibility indicates that existing components can be used , avoiding Screen Shot 2018-06-03 at 14.10.04the expense of retooling, while preserving their brand image.   Prospective manufacturers can be helped to leap ahead of the field once their chair is shown to have optimised ergonomics.  ☛ Manufacturers  →


to architectsFor New offices ‘Coolness’ is the word to  excite media interest for both the company and the Architect/Designer.   Most firms aspire to project this cutting edge image.    A 2T chair answers this exactly and in addition reduces LBP and increases productivity by lessened morbidity and stress.  Also see

To office managersAllows an alternative view to the usual hype, often laughably misguided, from manufacturers, .

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