Biomechanical and physiological comparison of barefoot and two shod conditions in experienced barefoot runners.
Biomechanical and physiological comparison of barefoot and two shod conditions in experienced barefoot runners.
复制标题
有经验的赤脚跑步者赤脚和两种鞋的生物力学和生理比较。
DOI：
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复制
发表时间：
2009
影响因子：
1.7
通讯作者：
C. Gallozzi
中科院分区：
文献类型：
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作者：
R. Squadrone;C. Gallozzi
目的
本研究的第一个目的是评估如何在足部/鞋-地面界面的机械特性的变化影响时空变量，地面压力分布，矢状面运动学，和运行经济在8个有经验的赤脚跑步者。第二个目的是评估一种特殊的轻质鞋（Vibram Fivefingers）是否能有效地模拟赤脚跑步的体验。
方法
通过使用仪器化跑步机，赤脚跑步，用五指跑步，和标准跑步鞋跑步进行比较，分析了大量的连续步骤。同时采集足/鞋-地面界面压力分布、下肢运动学、V.O2和心率数据。
结果
与标准穿鞋状态相比，赤脚跑步时运动员的踝关节跖屈更大。这导致了冲击力的降低和步幅运动学的变化。尤其是步幅和接触时间明显缩短，步频明显增加（P<0.05）。与标准穿鞋条件相比，五指跑的V.O（2）和峰值冲击力显著降低（P<0.05），更接近赤足跑。五指法与赤脚跑步的下肢运动学相似，但其足底屈度显著高于对照鞋（P<0.05）。
结论
本研究的数据支持这样的假设，即在一组有经验的赤脚跑步者中，脚-地面界面的变化导致跑步模式的变化。Fivefingers模型似乎可以有效地模仿赤脚条件，同时提供少量的保护。
AIM
The first aim of this study was to assess how changes in the mechanical characteristics of the foot/shoe-ground interface affect spatio-temporal variables, ground pressure distribution, sagittal plane kinematics, and running economy in 8 experienced barefoot runners. The second aim was to assess if a special lightweight shoe (Vibram Fivefingers) was effective in mimic the experience of barefoot running.
METHODS
By using an instrumented treadmill, barefoot running, running with the Fivefingers, and running with standard running shoe were compared, analyzing a large numbers of consecutive steps. Foot/shoe-ground interface pressure distribution, lower limb kinematics, V.O(2) and heart rate data were simultaneously collected.
RESULTS
Compared to the standard shod condition when running barefoot the athletes landed in more plantarflexion at the ankle. This caused reduced impact forces and changes in stride kinematics. In particular, significantly shorter stride length and contact times and higher stride frequency were observed (P<0.05). Compared to standard shod condition, V.O(2) and peak impact forces were significantly lower with Fivefingers (P<0.05) and much closer to barefoot running. Lower limb kinematics with Fivefingers was similar to barefoot running with a foot position which was significantly more plantarflexed than in control shoe (P<0.05).
CONCLUSIONS
The data of this study support the assumption that changes in the foot-ground interface led to changes in running pattern in a group of experienced barefoot runners. The Fivefingers model seems to be effective in imitating the barefoot conditions while providing a small amount of protection.