Fatigue effects on the coordinative pattern during cycling: Kinetics and kinematics evaluation
Fatigue effects on the coordinative pattern during cycling: Kinetics and kinematics evaluation
复制标题
DOI：
10.1016/j.jelekin.2008.10.003
复制
发表时间：
2010-02-01
影响因子：
2.5
通讯作者：
Mota, Carlos Bolli
中科院分区：
文献类型：
--
作者：
Bini, Rodrigo Rico;Diefenthaeler, Fernando;Mota, Carlos Bolli
本研究的目的是分析净关节力矩分布，关节力和运动学在骑自行车到力竭。在100%POMAX的疲劳循环测试中，测量了右踏板力和下肢运动学（通常是骑自行车的人）。通过逆动力学方法计算了髋、膝、踝关节的绝对净关节力矩、合力和运动学。计算了每个节点对总节点净力矩的贡献。在测试结束时，观察到踏板节奏降低，随后踝关节力矩对总关节力矩的贡献降低。总的绝对关节力矩以及髋关节和膝关节力矩也随着疲劳而增加。合力增加，而髋关节、膝关节和踝关节的运动学在测试结束时发生了变化。踝关节对总绝对关节力矩的贡献减少，加上踝关节力增加和运动学变化，表明该关节具有不同的机械功能。由于髋关节和膝关节作为动力源的功能，预期在髋关节和膝关节观察到动力学和运动学变化。运动变化可以解释为试图克服疲劳期间肌肉收缩性能下降（C）2008 Elsevier Ltd.保留所有权利。
The aim of the present study was to analyze the net joint moment distribution, joint forces and kinematics during cycling to exhaustion. Right pedal forces and lower limb kinematics often cyclists were measured throughout a fatigue cycling test at 100% of POMAX. The absolute net joint moments, resultant force and kinematics were calculated for the hip, knee and ankle joint through inverse dynamics. The contribution of each joint to the total net joint moments was computed. Decreased pedaling cadence was observed followed by a decreased ankle moment contribution to the total joint moments in the end of the test. The total absolute joint moment, and the hip and knee moments has also increased with fatigue. Resultant force was increased, while kinematics has changed in the end of the test for hip, knee and ankle joints. Reduced ankle contribution to the total absolute joint moment combined with higher ankle force and changes in kinematics has indicated a different mechanical function for this joint. Kinetics and kinematics changes observed at hip and knee joint was expected due to their function as power sources. Kinematics changes would be explained as an attempt to overcome decreased contractile properties of muscles during fatigue (C) 2008 Elsevier Ltd. All rights reserved.