Characteristics of shock attenuation during fatigued running
Characteristics of shock attenuation during fatigued running
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DOI：
10.1080/0264041031000140383
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发表时间：
2003-11-01
影响因子：
3.4
通讯作者：
Hreljac, A
中科院分区：
文献类型：
--
作者：
Mercer, JA;Bates, BT;Hreljac, A
这项研究的目的是检查在跑步机上跑步时完成最大努力分级运动测试之前和之后的冲击衰减。10名受试者在最大分级运动测试前后跑步，跑步速度控制在不同的条件之间。传递函数是使用表面安装的加速度计来计算的，以表示冲击衰减。一个加速度计安装在胫骨的远侧，另一个安装在前额的前侧。所有参与者在每种情况下都分析了10个步幅。使用配对t检验比较不同条件(运动测试前和运动后)之间的每个因变量(冲击衰减、步长、耗氧率)。在分级运动试验(47.9+/-5.0ml)后跑步时，氧耗量增加了16%。Kg-1。Min-1；平均值+/-S)，比运动前(41.1+/-2.7ml)低。Kg-1。Min-1)(P<0.05)。分级运动试验后(-9.8+/-2.6d B)减震效果比运动前(-11.3+/-2.7d B)平均降低12%(P
The aim of this study was to examine shock attenuation before and after completing a maximal effort graded exercise test while running on a treadmill. Ten individuals ran before and after a maximal graded exercise test with running speed controlled between conditions. Transfer functions were calculated using surface-mounted accelerometers to represent shock attenuation. An accelerometer was mounted on the distal aspect of the tibia and another on the anterior aspect of the forehead. Ten strides were analysed in each condition for all participants. Paired t -tests were used to compare each dependent variable (shock attenuation, stride length, rate of oxygen consumption) between conditions (running before vs after the exercise test). Oxygen consumption was 16% greater when running after the graded exercise test (47.9+/-5.0 ml . kg -1 . min -1 ; mean+/- s ) than when running before it (41.1+/-2.7 ml . kg -1 . min -1 ) ( P 0.05). Shock attenuation was, on average, 12% lower during running after (-9.8+/-2.6 dB) than before (-11.3+/-2.7 dB) the graded exercise test ( P