Examining the Impact of Rotated Neck and Trunk Postures on Vertical Seat-to-Head Vibration Transmissibility and Self-Reported Discomfort

Goggins, Katie; Kelly, Elizabeth A.; Thompson, Taryn J.; Eger, Tammy

doi:10.3390/vibration5020018

Cited by 3 publications

(2 citation statements)

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“…These can affect muscles, joints and tendons and in general, develop over time; these disorders can be either episodic or chronic, and also can result from an injury acquired in a workrelated accident. Among the jobs that have the highest rates of WRMSDs are agriculture and forestry, construction, transport and storage (Goggins et al 2022). Among the various musculoskeletal disorders and impairments, Lower…”

Section: Introductionmentioning

confidence: 99%

“…The study was done over a small participants group and over 4 short 1-hour test sessions and yet the results showed that even such short periods of WBV cause higher levels of discomfort. Furthermore, without whole body vibrations, participants of the study had even higher levels of discomfort due to sitting at rotated postures as that caused increased muscle and joint fatigue and in turn may lead to occupational trauma if taken in a scenario of work setting (Goggins et al 2022).…”

Section: Introductionmentioning

confidence: 99%

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Effects of Prolonged Sitting Posture on Neck and Shoulder Joints During Occupational Driving:Human Ergonomic Simulation Software

Dhaiban,

Bin Amro,

Amer

2023

Proceedings of the International Conference on Industrial Engineering and Operations Management

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This study investigates the impact of prolonged driving posture for occupational drives on the upper back muscles. There have been limited papers in the literature that studies the upper body muscles hence this study focuses specifically on neck and shoulder muscles. A human simulation software called Jack software was used to measure the impact of the driving posture on these muscles. Three different trunk conditions relative to the angles were adopted as follows: extension, neutral and flexion. The trail incorporated four different postures to mimic the real driving experience including the neck muscle at the neutral position, neck lateral rotation to the left and neck extension. The results of this study reveal that the lowest discomfort levels of both neck and shoulders were measured at the trunk flexion position, thus it suggested that a proper headrest that would support the neck at 15 degrees' extension would help to reduce the strain on the joint.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of Prolonged Sitting Posture on Neck and Shoulder Joints During Occupational Driving:Human Ergonomic Simulation Software

Dhaiban,

Bin Amro,

Amer

2023

Proceedings of the International Conference on Industrial Engineering and Operations Management

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The effects of standing foot-transmitted vibration on self-reported discomfort ratings

Goggins,

Thompson,

Lessel

et al. 2024

WOR

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BACKGROUND: Occupational foot-transmitted vibration (FTV) exposure is common in industries like mining, construction, and agriculture, often leading to acute and chronic injuries. Vibration assessments require technical expertise and equipment which can be costly for employers to perform. Alternatively, researchers have observed that self-reported discomfort can be used as an effective indicator of injury risk. OBJECTIVE: This study aimed to investigate the effect of standing FTV exposure on self-reported ratings of discomfort, and whether these subjective ratings differed by body area and exposure frequency. METHODS: Participants (n = 30) were randomly exposed to standing FTV at six frequencies (25, 30, 35, 40, 45, and 50 Hz) for 20–45 seconds. Following each exposure, participants rated discomfort on a scale of 0–9 in four body areas: head and neck (HN), upper body (UB), lower body (LB), and total body. RESULTS: Results indicated that participants experienced the most discomfort in the LB at higher frequencies (p < 0.001), consistent with the resonance of foot structures. The HN discomfort tended to decrease as the exposure frequency increased, although not statistically significant (p > 0.0167). The UB discomfort remained relatively low across all frequencies. CONCLUSIONS: The study suggests a potential connection between resonant frequencies and discomfort, potentially indicating injury risk. Although self-reported discomfort is insufficient for directly assessing injury risk from FTV, it provides a simple method for monitoring potential musculoskeletal risks related to vibration exposure at resonant frequencies. While professional vibration assessment remains necessary, self-reported discomfort may act as an early indicated of vibration-induced injuries, aiding in implementing mitigation strategies.

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Gender and Anthropometric Effects on Seat-to-Head Transmissibility Responses to Vertical Whole-Body Vibration of Humans Seated on an Elastic Seat

2023

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This study investigated the effects of gender and ten different anthropometric parameters on the vertical vibration transmission from seat to the head of the body seated on an elastic seat. The seat-to-head transmissibility (STHT) responses in the vertical and fore-aft directions of 58 participants (31 males and 27 females) were measured under three levels of vertical vibration (root mean square acceleration: 0.25, 0.50, and 0.75 m/s2) in the 0.50–20 Hz range, when sitting on a viscoelastic seat with and without a vertical back support, and with hands on a steering wheel. Apart from the important effects of elastic coupling between the body and seat, the results show distinctly different vertical and fore-aft STHT responses from the two genders. Moreover, the gender effect was strongly coupled with back support and excitation conditions. The primary resonance frequencies of male subjects were higher than those of female subjects, while the peak vertical STHT magnitudes were comparable. Owing to the strong coupled effects of gender and anthropometric dimensions, the study is designed to reduce the coupling by considering datasets for subjects with comparable chosen dimensions. Among the various anthropometric dimensions considered, the body mass and fat mass revealed strong influences on the primary resonance frequency, which was similar for male and female subjects with comparable body mass index and body fat mass. The vertical STHT magnitude of the two genders with the same lean body mass was also nearly identical. The peak fore-aft STHT magnitudes of the male subjects were notably higher than those of the female subjects with comparable anthropometric dimensions with the exception of the body mass.

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Examining the Impact of Rotated Neck and Trunk Postures on Vertical Seat-to-Head Vibration Transmissibility and Self-Reported Discomfort

Cited by 3 publications

References 54 publications

Effects of Prolonged Sitting Posture on Neck and Shoulder Joints During Occupational Driving:Human Ergonomic Simulation Software

Effects of Prolonged Sitting Posture on Neck and Shoulder Joints During Occupational Driving:Human Ergonomic Simulation Software

The effects of standing foot-transmitted vibration on self-reported discomfort ratings

Gender and Anthropometric Effects on Seat-to-Head Transmissibility Responses to Vertical Whole-Body Vibration of Humans Seated on an Elastic Seat

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