Screen Shot 2018-06-02 at 15.15.30An account of the bio-mechanic (ergonomic) factors, associated with prolonged sitting,  accounting for mechanical spinal pathology (Backache, LBP, IVDisc pathology, CTD) and options for their remediation.

  •  Screen Shot 2018-06-14 at 12.52.45To avoid designing ergonomic adverse chairs.  ….  
  • Some knowledge of spinal anatomy, pathology & bio-mechanics.☛  The SCIENCE
  • The adverse effects of mid-upright sitting.  ☛ The upright seated posture. →
  • Optimising chair design.☛REMEDIATION →


  • The work is  intended as a resource for the design of work chairs.  It represents some essential reading  for designers of ergonomic chairs and manufacturersof retail office chairs  if they wish to improve the ‘ergonomics’ of their models with overwhelming health selling points.
  • Office managers should consult this blog as a resource.   It is also very relevant to Interior designers and architects involved with office design and not forgetting the ‘end user’ who has the ultimate benefit .


For some readers this study was too large and diffuse.   It is now divided into subdivisions.

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Screen Shot 2016-03-18 at 08.41.28To remediation2T direction


This is indicated in the top menu↑.   All post are shown in the menu on the right→ .    

Specialists will prefer to jump directly to their page of interest using the Right menu→.

For an overview of contents…..

Screen Shot 2016-05-16 at 18.50.05See the SPECIALIST page →  This includes a large body of research and background, on spinal bio-mechanics.  It is subdivided into :-

Screen Shot 2016-05-17 at 15.59.14 Manufacturers can be reassured that feasibility indicates that existing components can be used , Screen Shot 2017-05-23 at 07.52.02avoiding the expense of retooling, while preserving their brand image.   Prospective manufacturers can be helped to leap ahead of the field,  ☛  →

New ideas can create both threats and opportunities , once both familiarity  and normalcy biases are overcome.  Creative disruption works.

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to architects

For 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, or the derived 4M workstation, answers this exactly and in addition reduces LBP and increases productivity by lessened morbidity and stress. ( Also see  ☛ Ergonomics and office stress.→ )

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


To remediationBackache & chairs.   A number of systems are described.  Spinal bio-mechanics dictates that prolonged sitting should be performed in a reclined position with frequent change of posture.  For a full remediation  a number of requirements are essential.   To be effective these are detailed in the 2 Tilt (2T) concept.

Topics and some relevant subjects

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