Evaluation of driver's discomfort and postural change using dynamic body pressure distribution

Na, Seokhee; Lim, Soo-Jeong; Choi, Hwa-Soon; Chung, Min K.

doi:10.1016/j.ergon.2005.03.004

Cited by 121 publications

(75 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Other studies reported on transient movements that did not require a minimum duration. Results of these studies varied widely from 8 to 72 movements per hour [26,28,[40][41]. The present study found that in-seat activity occurred at a frequency of 42 times per hour, placing it on the same order of magnitude as published results using nondisabled participants.…”

Section: Discussionsupporting

confidence: 74%

See 1 more Smart Citation

Everyday sitting behavior of full-time wheelchair users

Sonenblum

Sprigle

Martin³

2016

J Rehabil Res Dev

View full text Add to dashboard Cite

Abstract-The objective of this study was to describe the inseat movement and weight-shifting behavior of full-time wheelchair users. We measured everyday sitting behavior for 192 d across 28 individuals who used manual wheelchairs as their primary mobility device. To obtain the measurements, we used eight thin force sensors placed under participants' wheelchair cushions. On a typical day, participants spent an average of 10.6 +/ 3.0 h in their wheelchair and transferred out of the wheelchair 8.4 +/ 4.3 times. Participants only performed pressure reliefs (90% off-loading of the entire buttocks for at least 15 s) 0.4 +/ 0.5 times per hour they were seated in the chair, but they performed weight shifts (WSs) (30%-90% off-loading of at least one side of the buttocks for 15 s) with a frequency of 2.4 +/ 2.2 times per hour. Despite the higher frequency of WSs, they were not performed in a routine manner. Half of the days studied included one segment of upright sitting lasting at least 2 h without a WS. Given these observations, we conclude that seating evaluations should emphasize positioning individuals in a way that facilitates reaching, leaning, and transferring in a safe manner, not only to improve function but also to affect buttocks loading.

show abstract

Section: Discussionsupporting

confidence: 74%

“…Much research has been undertaken to understand how people change seated postures during occupational sitting [26][27][28], typically measuring movements over a short period of time.…”

Section: Introductionmentioning

confidence: 99%

Everyday sitting behavior of full-time wheelchair users

Sonenblum

Sprigle

Martin³

2016

J Rehabil Res Dev

View full text Add to dashboard Cite

show abstract

“…As mentioned by Na et al (2005), drivers' comfort was as important as the functional and aesthetic design of automobiles since consumers are more and more concerned about safety and comfortable driving.…”

Section: Introductionmentioning

confidence: 99%

“…There have been many past research and experiments conducted in driver's car posture (Na et al, 2005;Hirao et al, 2006;Hermanns et al, 2008;Falou et al, 2003;Park et al, 2000;Andreoni et al, 2002;Kyung and Nussbaum, 2008;Reed et al, 2000;Sun et al, 2006) but none was conducted for the Malaysian population. So, this study is aiming to publish comfortable and safe driving postures as preferred by Malaysian car drivers.…”

Section: Introductionmentioning

confidence: 99%

Integration of Comfort into a Driver's Car Seat Design Using Image Analysis

Mohamad

Deros²,

Wahab³

et al. 2010

American Journal of Applied Sciences

View full text Add to dashboard Cite

Problem statement:The purposes of this study are twofold: First, to recommend a range of angles for driving posture comfort from measurement of participants and second, to investigate the relationships between drivers' anthropometric characteristics, comfortable postural angles and seat adjustment. Approach: Forty five participants were involved in the study. Both anthropometric data and postural angles were measured and recorded by using the photographic technique and analyzed further using software. During the study, each participant was required to sit on the driver's seat in his or her preferred comfortable driving postures. Images of the participant's driving posture were taken after 5 min he or she has been in the driving position to allow him/her to adapt with the seat environment and fabrics. The seat adjustment data were measured manually after the seat is adjusted for comfort by the participant. Prior to that, 10 anthropometric data of each participant was measured and recorded. Data on comfortable driving postural angles, anthropometry and seat adjustment were analyzed statistically with Pearson correlation using the SPSS software. Results: From the study, a range of angles are proposed based on the participant's perception on comfort. The ranges of comfortable angles for Malaysian citizen proposed shows significant different between Caucasian and Korean populations. The relationships between the comfortable postural angles, anthropometric data and seat adjustment were analyzed and discussed with several outcome shows that taller participants preferred a driving posture with their arms outstretched in order to achieve comfort, participants with bigger body dimension have a tendency to sit farther back from the steering wheels and smaller participants prefer to sit closer to the steering wheels with a slightly greater trunk thigh angle. Conclusion: The result obtained and discussed in this study can be applied in the driver's car seat design and construction to ensure comfort and safety.

show abstract

“…Very few studies have attempted to determine the shape of the plantar surface of the foot even though contact or the lack of contact between a foot and shoe will alter the force distribution along the plantar surface, especially in the mid-foot region (Alemány et al, 2003). The firmness, anthropometric features and pressure distributions (Na et al, 2005, DeVocht et al, 2006 are all factors known to contribute towards comfort (Lee and Park, 2006). …”

mentioning

confidence: 99%

Effects of surface characteristics on the plantar shape of feet and subjects’ perceived sensations

et al. 2009

View full text Add to dashboard Cite

Orthotics and other types of shoe inserts are primarily designed to reduce injury and improve comfort. The interaction between the plantar surface of the foot and the load bearing surface contributes to foot and surface deformations and hence to perceived comfort, discomfort or pain. The plantar shapes of 16 participants' feet were captured when standing on three support surfaces that had different cushioning properties in the mid-foot region. Foot shape deformations were quantified using 3D laser scans. A questionnaire was used to evaluate the participant's perceptions of perceived shape and perceived feeling. The results showed that the structure in the mid-foot can change shape, independent of the rear-foot and forefoot regions. Participants were capable of identifying the shape changes with distinct preferences towards certain shapes. The cushioning properties of the mid-foot materials also have a direct influence on perceived feelings. This research has strong implications for the design and material selection of orthotics, insoles and footwear.

show abstract

Evaluation of driver's discomfort and postural change using dynamic body pressure distribution

Cited by 121 publications

References 16 publications

Everyday sitting behavior of full-time wheelchair users

Everyday sitting behavior of full-time wheelchair users

Integration of Comfort into a Driver's Car Seat Design Using Image Analysis

Effects of surface characteristics on the plantar shape of feet and subjects’ perceived sensations

Contact Info

Product

Resources

About