Measuring Pressure Interface of Local Car Seats Under Static and Dynamic Circumstances: A Comparative Study

Last reviewed: March 2026

Background and Rationale

Driving comfort and ergonomic seat design are significant public health concerns, particularly in countries like Malaysia where commuting times are substantial and the prevalence of driving-related musculoskeletal disorders is increasing. Malaysian adults spend an average of considerable time commuting daily, and the design of car seats plays a crucial role in determining the distribution of pressure across the body during driving. Poorly designed seats can contribute to lower back pain, sciatica, and other musculoskeletal conditions that represent a significant burden on the healthcare system and economy.

Pressure interface measurement—the quantification of pressure between the human body and the seat surface—has emerged as a key methodology in automotive ergonomics research. However, most existing research has focused on international vehicle brands, and relatively little attention has been paid to locally manufactured car seats in the Malaysian market. Furthermore, most studies have assessed pressure distribution under static conditions only, despite the fact that driving involves continuous dynamic movements including steering, braking, and accelerating, all of which alter pressure patterns substantially.

This study, published in the Malaysian Journal of Public Health Medicine’s Special Volume on occupational health and ergonomics, addressed both of these knowledge gaps by comparing pressure interface measurements under static and dynamic circumstances specifically for car seats available in the Malaysian market.

Study Design and Methods

The research employed a comparative experimental design in which participants were assessed under both static and dynamic driving conditions. Pressure distribution was measured using calibrated pressure mapping systems placed on the car seats, capturing data from the seat pan (the horizontal sitting surface) and the backrest. Participants were assessed while seated stationary (static condition) and while performing standardised driving tasks on a driving simulator (dynamic condition).

The pressure mapping system recorded multiple parameters including peak pressure, average pressure, contact area, and pressure distribution patterns across different zones of the seat. These measurements were compared between conditions using appropriate statistical analyses to determine whether significant differences existed between static and dynamic pressure profiles.

Principal Findings

The results demonstrated that pressure distribution patterns differed significantly between static and dynamic conditions. During dynamic driving simulation, participants experienced altered pressure distributions characterised by shifts in peak pressure location, changes in contact area, and modifications to the overall pressure profile. These differences were particularly pronounced in the seat pan region, where the dynamic forces of acceleration, braking, and steering caused measurable redistribution of body weight.

The findings indicate that assessments of seat comfort and ergonomic performance based solely on static pressure measurements may not accurately predict the driving experience. This has important implications for automotive seat design and testing, suggesting that dynamic assessment protocols should be incorporated into standard evaluation procedures.

Implications for Automotive Ergonomics in Malaysia

Malaysia has a thriving automotive industry, including national carmakers whose products are widely used throughout Southeast Asia. The findings of this study provide empirical evidence that can inform the design and testing of car seats to better accommodate the pressures experienced during actual driving conditions. Improved seat design has the potential to reduce the incidence of driving-related musculoskeletal disorders, which represent a significant proportion of occupational health complaints among professional drivers and regular commuters alike.

The research also has implications for road safety, as driver discomfort and fatigue—both of which are influenced by seat design—are recognised risk factors for road traffic accidents. By contributing to the development of more ergonomically optimised seats, this research may indirectly contribute to improved driving safety outcomes.

Limitations

The study was conducted in a laboratory setting using a driving simulator, which, while providing controlled and reproducible conditions, may not fully replicate the vibrations, road surface variations, and environmental factors experienced during actual on-road driving. The sample size and participant demographics may limit generalisability across the full range of body types and anthropometric characteristics found in the Malaysian population. The specific car seats tested may not represent all models available in the Malaysian market.

Significance of This Research

This study makes a valuable contribution to the field of automotive ergonomics in the Malaysian context. By demonstrating the inadequacy of static-only pressure assessments and highlighting the importance of dynamic testing, it provides a methodological foundation for more rigorous evaluation of car seat design. As Malaysia continues to develop its automotive industry and address the growing burden of musculoskeletal disorders among its driving population, research of this nature will be increasingly important for informing evidence-based design standards and public health interventions.

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