ergonomic office S.P.A.S Model Sit → Perch → Active Stand ™

ergonomic office S.P.A.S Model (Sit → Perch → Active Stand) ™

Risk sits with prolonged sedentary duration without movement.

The ergonomic office S.P.A.S Model (Sit → Perch → Active Stand) ™ mitigates this risk through posture variation and dynamic movement options across the workday.

S.P.A.S Model (Sit → Perch → Active Stand)™

Foundation Principle - Observed Ergonomics

Observed ergonomics optimises variable time distribution across postures rather than reliance on any single posture, thereby reducing prolonged static duration while supporting comfort, circulation, performance and sustainability at work.

This principle forms the foundation of the ergonomic office S.P.A.S Model (Sit → Perch → Active Stand)™

The SPAS Posture States

The SPAS Model defines three primary posture states:

  1. Sitting

  2. Perching

  3. Active Standing

These states are intentionally designed to be alternated, not held for extended periods.

Dynamic Movement - within an ergonomic office S.P.A.S Model. (Sit → Perch → Active Stand) ™

By intentionally alternating between S.P.A.S stages the body is encouraged to engage in dynamic movement and continuous micro-movement throughout the workday.

Dynamic movement is facilitated through:

  • Regular posture transitions

  • Small, frequent adjustments in joint angle and weight-bearing

  • Natural shifts between supported and upright postures

This approach reduces prolonged static duration while supporting postural sustainability.

Circulation & Physiological Support

Regular posture transitions and micro-movement support circulation by:

  • Activating the muscle pump in the lower limbs

  • Supporting venous return

  • Reducing blood pooling associated with prolonged sitting or static standing

  • Encouraging gentle, frequent changes in joint angle and load-sharing

Small posture changes help the body reset and keep blood moving.

Posture changes and brief movement contribute to natural repose and help maintain healthy blood flow across the workday.

Sedentary Risk Reduction

The ergonomic office S.P.A.S Model (Sit → Perch → Active Stand)™ reduces sedentary risk by encouraging:

  • Posture variation

  • Regular movement

  • Reduced static loading duration

Sedentary risk is addressed through behavioural design.

Usage Statement — SPAS™ Model

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"ergonomic office S.P.A.S Model  Sit → Perch → Active Stand ™ "

 

The ergonomicoffice® SPAS™ Model (Sit · Perch · Active Support) and associated graphics describe a structured, three-stage approach to posture and movement informed by applied ergonomics and observed workplace behaviour.     SPAS™ is an open explanatory framework that may be freely referenced by health professionals, ergonomists, WHS practitioners and clinicians for educational, assessment, and advisory purposes, provided attribution to eo  is retained.  The SPAS™ name, structure, terminology and visual representations remain the intellectual property of ergonomicoffice and may not be modified, rebranded or presented as third-party models or commercial systems without permission.