Effect of Work Boot Characteristics on Vibration Transmitted to Workers’ Feet and Subjective Discomfort

Tarabini, Marco; Eger, Tammy; Goggins, Katie; Goi, Filippo; Corti, F.

doi:10.1007/978-3-319-96068-5_117

Cited by 2 publications

(2 citation statements)

References 10 publications

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“…After each test, participants were asked to report their level of discomfort D p,h,i for the plate p and the handlebar h on a 0-9 scale. Marks were normalized (d p,h,i ) by subtracting the average discomfort μ i reported by the participant for all the handlebars and plates and dividing the difference by the standard deviation σ i of data reported by the same participant, similarly to what was done in similar literature studies (Tarabini 2018, Dickey 2007.…”

Section: Methodsmentioning

confidence: 99%

Hand-arm vibration in motocross:measurement and mitigation actions

Tarabini

Mauri

Gaudio

et al. 2020

Muscle Ligaments and Tendons J

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Objective. This study focused on the quantification of vibration which reaches the hands of motocross riders and on the reduction of such vibration thanks to the handlebar and handlebar mounts. Background. Vibration transmitted through the hand and arm can lead to vascular and musculoskeletal problems that are well documented in the scientific literature. Controlled studies identifying plate-handlebar characteristics effects on the vibration attenuation in motocross are lacking. Methods. We measured the vibration exposure of professional and recreational motocross riders on a motocross track and replicated the vibration patterns on a LDS V930 shaker in the laboratory, to analyze the effectiveness of various components in reducing the rider vibration exposure. Laboratory tests were performed with ten subjects randomly gripping different combinations of handlebars and steering plates, and questionnaires were used to evaluate the comfort. Objective measurements of vibration reduction were then compared to the subjective values of perceived comfort. Results. According to the current EU legislation, the measured vibration levels reach the exposure limit in less than 1h. The mechanical characteristics of the handlebars and steering plates have a limited effect on the vibration transmitted to the rider's hands. The rubber elements that many manufacturers use to reduce the vibration have limited effects at frequencies that are harmful for the musculoskeletal system. Questionnaires results have no correlation with the measured plate and handlebar performances. Conclusions. Most of the techniques used to reduce the hand-arm vibration exposure of motocross drivers are ineffective.

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Section: Methodsmentioning

confidence: 99%

Hand-arm vibration in motocross:measurement and mitigation actions

Tarabini

Mauri

Gaudio

et al. 2020

Muscle Ligaments and Tendons J

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show abstract

“…Tests were performed at the experimental facilities of Politecnico di Milano, Lecco, Italy [19][20][21]. The vertical vibration was generated by an electrodynamic shaker (LDS V830, maximum stroke ±25 mm) and was controlled in a closed loop by an LMS Test Lab system.…”

Section: Occupational Exposure To Foot Transmitted Vibrationmentioning

confidence: 99%

Effect of the Shoe Sole on the Vibration Transmitted from the Supporting Surface to the Feet

et al. 2021

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Vibration transmitted through the foot can lead to vibration white feet, resulting in blanching of the toes and the disruption of blood circulation. Controlled studies identifying industrial boot characteristics effective at attenuating vibration exposure are lacking. This work focused on the evaluation of vibration transmissibility of boot midsole materials and insoles across the range 10–200 Hz at different foot locations. Questionnaires were used to evaluate the comfort of each material. The materials were less effective at attenuating vibration transmitted to the toe region of the foot than the heel. Between 10 and 20 Hz, all midsole materials reduced the average vibration transmitted to the foot. The average transmissibility at the toes above 100 Hz was larger than 1, evidencing that none of the tested material protects the worker from vibration-related risks. There was a poor correlation between the vibration transmissibility and the subjective evaluation of comfort. Future research is needed to identify materials effective for protecting both the toe and the heel regions of the foot. Specific standards for shoe testing are required as well.

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Effect of Work Boot Characteristics on Vibration Transmitted to Workers’ Feet and Subjective Discomfort

Cited by 2 publications

References 10 publications

Hand-arm vibration in motocross:measurement and mitigation actions

Hand-arm vibration in motocross:measurement and mitigation actions

Effect of the Shoe Sole on the Vibration Transmitted from the Supporting Surface to the Feet

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