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Body load and the postural precursors of motion sickness

机译：身体负荷和晕车的姿势前兆

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Physical properties of the body affect the control of standing body sway. One example occurs when loads are added to the body, such as occurs when wearing a backpack. Other research has shown that subjective symptoms of motion sickness are preceded by differences in body sway between individuals who later report motion sickness and those who do not. In the present study we asked whether loads worn on the body would affect relations between body sway and motion sickness. We measured standing body sway without load and then with loads worn at the shoulders or thighs. Then participants were exposed to potentially nauseogenic visual motion stimulation while wearing shoulder or thigh loads. We measured body sway continuously during exposure to visual motion. Thirteen of 36 participants (36%) reported motion sickness. Body sway was affected by loads and by load position, consistent with previous research. Also consistent with previous research, sway differed between well and sick participants both before and during exposure to visual motion stimuli. In addition, during room motion the well and sick participants responded differently to loads. The results are consistent with the hypothesis that physical properties of the body can affect relations between body sway and motion sickness.
机译：身体的物理特性会影响站立时身体摇摆的控制。一个例子发生在将负荷加到身体上时，例如当穿着背包时。其他研究表明，晕动病的主观症状先于后来报告晕动病的人和没有晕动病的人之间的身体摇摆差异。在本研究中，我们询问穿戴在身体上的负荷是否会影响摇摆和晕车之间的关系。我们测量站立的身体在没有负荷的情况下的摇摆，然后在肩膀或大腿上负荷的情况下进行摇摆。然后，参与者在戴着肩膀或大腿负重时暴露于潜在的令人恶心的视觉运动刺激。我们在暴露于视觉运动期间连续测量了身体的摇摆。 36名参与者中有13名（36％）报告了晕车病。车身摇摆受到载荷和载荷位置的影响，与先前的研究一致。同样与先前的研究一致，在暴露于视觉运动刺激之前和期间，健康参与者和患病参与者之间的摇摆有所不同。此外，在室内运动期间，身体健康的病人对负荷的反应也不同。该结果与以下假设相吻合：人体的物理特性会影响人体摇摆与晕车之间的关系。

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