Hawra Al Sinan

University of Sharjah

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Sadeque Hamdan

Bangor University

Naser Nawayseh

University of Sharjah

Shamma Alteneiji

University of Sharjah

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University of Sharjah

Bangor University

University of Kent

Université Paris-Saclay

Laboratoire Génie Industriel

CentraleSupélec

Bouygues (France)

Institute of Industrial Engineering

Dhofar University

University of Southampton

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Effect of gender on the biodynamic responses to vibration induced by a whole-body vibration training machine

Proceedings of the Institution of Mechanical Engineers Part H Journal of Engineering in Medicine (2019)

Naser Nawayseh Hawra Al Sinan Shamma Alteneiji Sadeque Hamdan

Whole-body vibration training machines are used by both male and female users. However, studies investigating the biodynamic responses to vibration during training have used either mixed-gender subjects or male subjects. No study has investigated the effect of gender on the biodynamic responses under vibration training conditions. The objective of this study is to investigate the effect of gender on the apparent mass and the vibration of the head of standing people during exposure to vibration. A total of 40 subjects (20 females and 20 males) were exposed to vertical vibration at six frequencies in the range 20-45 Hz and vibration acceleration in the range 10.8-20.9 m/s2 (peak). The subjects stood on a force platform mounted on the vibrating plate of the machine adopting an upright standing posture with their knees unlocked and their arms straight along their bodies. The vertical acceleration and force at the interface between the vibrating plate and the feet were measured and used to calculate the apparent mass. The accelerations of the head in the x-, y- and z-directions were also measured and used to calculate the transmissibility to the head. The apparent mass of males was found higher than that of females. The transmissibility to the head in all directions was found higher in females than males. The differences in the biodynamic responses between males and females were attributed to the differences in body properties and structure of the two genders. The results of this study imply the need for gender-specific vibration training programmes.

Transmissibility (structural dynamics)

Whole body vibration

Mechanical vibration

10.1177/0954411919830122

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