Relationship between comfort and back posture and mobility in sitting-posture

Area of Science:

• Biomechanics
• Ergonomics
• Human Factors Engineering

Background:

• Prolonged sitting is associated with lumbar discomfort.
• Understanding the biomechanical factors contributing to discomfort is crucial for ergonomic interventions.

Purpose of the Study:

• To investigate the relationship between lumbar curvature, pelvic inclination, and their mobilities with the incidence of lumbar discomfort during sitting.
• To identify key postural parameters predictive of lumbar discomfort.

Main Methods:

• An experiment involving healthy subjects measuring comfort, posture, and mobility parameters.
• Multivariate statistical analyses, including factorial analysis, logistic regression, and discriminant analysis, were employed.

Main Results:

• Significant correlations were found between postural parameters and reported discomfort.
• Large postural variations were identified as a key indicator of discomfort.
• Lordotic postures, forward pelvic tilt, and reduced mobility were strongly associated with increased lumbar discomfort.

Conclusions:

• Lumbar curvature, pelvic inclination, and associated mobility significantly influence sitting comfort.
• Specific postures, characterized by lordosis, anterior pelvic tilt, and limited mobility, are primary contributors to lumbar discomfort.