Department of Engineering, University of Exeter, Exeter, UK.
J Sports Sci. 2021 Mar;39(5):489-495. doi: 10.1080/02640414.2020.1829361. Epub 2020 Oct 4.
Exposure to whole-body vibration (WBV) increases the risk of low back pain, spinal degeneration, and injury. Cycling can expose participants to WBV, but there are limited data available. This preliminary study quantified WBV in road cyclists in accordance with ISO 2631-1, and determined the efficacy of two seatposts designed to minimise vibration, compared to an aluminium alloy seatpost. Sensors were used to measure the root-mean-squared acceleration (a), frequency-weighted a based on an eight-hour reference period (A(8)), vibration dose value (VDV), and transmissibility. Exposures were also calculated using the root-sum-of-squares of the frequency-weighted a in all three axes (A(8) and VDV). The mean±95% confidence interval A(8) and VDV across all tests was 0.58 ± 0.07 ms and 37.19 ± 4.70 ms respectively at the saddle, if and 0.49 ± 0.06 ms and 24.31 ± 2.89 ms respectively at the lumbar position. Occupational limits were exceeded with all seatposts, and there were no significant differences between them (p > 0.227). Road cycling results in substantial WBV, and there was no evidence that the seatposts designed to minimise vibrations successfully do so. Further research into the effect of cycling conditions and equipment on WBV would be valuable to both the research and cycling communities.
全身振动（WBV）暴露会增加腰痛、脊柱退化和受伤的风险。骑自行车会使参与者暴露在 WBV 下，但目前可用的数据有限。本初步研究根据 ISO 2631-1 对公路自行车手的 WBV 进行了量化，并确定了两种旨在最小化振动的座管（与铝合金座管相比）的效果。传感器用于测量均方根加速度（a）、基于 8 小时参考期的加权频率 a（A(8)）、振动剂量值（VDV）和传递率。还使用所有三个轴上加权频率 a 的根和平方（A(8)和 VDV）来计算暴露量。在所有测试中，鞍座处的平均 A(8)和 VDV 分别为 0.58±0.07 ms 和 37.19±4.70 ms，如果是腰椎位置，则分别为 0.49±0.06 ms 和 24.31±2.89 ms。所有座管的职业限值都超过了，它们之间没有显著差异（p>0.227）。公路自行车会导致大量的 WBV，而且没有证据表明设计用于最小化振动的座管确实如此。进一步研究骑行条件和设备对 WBV 的影响，对研究界和骑行界都将是有价值的。
