Pré-Publication, Document De Travail Année : 2025

Biodynamic responses of the human hand-arm system under nail gun shock vibration and differences between males and females

Résumé

Occupational exposure to vibration from hand tools poses significant health risks, potentially leading to chronic disorders affecting nerves, muscles, and joints in the hand-arm system (HAS). Despite extensive research, the biodynamic response of the HAS to real-world shock vibrations remains insufficiently characterized, limiting effective risk assessment and prevention strategies. This study aims to quantify vibration transmissibility along the HAS during realistic nail gun operation and examine potential sex-related differences. Thirty participants (15 males, 15 females) performed standardized nail gun tasks while vibration transmissibility was measured at the wrist, forearm, upper arm, and shoulder. Results show a consistent decrease in peak transmissibility frequency from the wrist to the shoulder, reflecting a shift in biodynamic response along the HAS. Experimental modal analysis identified distinct natural frequencies across the HAS, with statistical analyses confirming significant sex-related differences, particularly in lower-frequency modes. These differences remained significant after adjusting for age, hand length, palm width, and BMI, suggesting underlying sex-specific biodynamic and anthropometric traits. The importance of a sufficiently large and balanced sample for reliably detecting sex-related effects is demonstrated. The findings highlight the importance of evaluating vibration exposure under realistic conditions, as conventional shaker tests may not fully replicate the dynamics of shock vibrations. Notably, transmissibility increased at high frequencies and decreased below 10 Hz, likely due to differences in experimental conditions. Furthermore, the observed sex-related differences support the need to incorporate sex-specific considerations into occupational health guidelines, ergonomic tool design, and exposure standards to reduce vibrationinduced health risks and improve worker safety.

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Dates et versions

hal-05044707 , version 1 (23-04-2025)
hal-05044707 , version 2 (18-02-2026)

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  • HAL Id : hal-05044707 , version 1

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Maxime Vincent, Akira Engelbrecht, Marc-André Gaudreau, Mathias Legrand, Thomas Dupont, et al.. Biodynamic responses of the human hand-arm system under nail gun shock vibration and differences between males and females. 2025. ⟨hal-05044707v1⟩
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