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首页> 美国政府科技报告 >Effects of Gender, Load, and Backpack on Easy Standing and Vertical Jump Performance. Volume II.
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Effects of Gender, Load, and Backpack on Easy Standing and Vertical Jump Performance. Volume II.

机译：性别，负荷和背包对轻松站立和垂直跳跃性能的影响。第二卷。

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This study was conducted to determine the effects of loads worn or carried and the type of backpack used on parameters of the easy standing and vertical jumping performance of men and women. Analyses of the easy standing data indicated that both men and women demonstrated greater stability with the medium than with the lighter or heavier loads. The internal frame backpack resulted in greater postural stability relative to the three, external-frame systems. Increasing loads produced a systematic, linear decrease in vertical jumping performance. Analyses of the effects of backpacks on the parameters of jumping performance revealed few differences among the packs. However, it was found that height of jump was somewhat better with the internal frame system than with the external-frame backpacks. Additional analyses were carried out on the trial-to-trial reliability of easy standing and on ground reaction force parameters of vertical jumping adjusted for body weight and system weight.

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