Koblbauer Ian F, van Schooten Kimberley S, Verhagen Evert A, van Dieën Jaap H
University of Glasgow, Institute of Cardiovascular and Medical Sciences, School of Medicine, Glasgow, Scotland, United Kingdom.
MOVE Research Institute Amsterdam, Faculty of Human Movement Sciences, VU University Amsterdam, The Netherlands.
J Sci Med Sport. 2014 Jul;17(4):419-24. doi: 10.1016/j.jsams.2013.05.013. Epub 2013 Jun 19.
This study aimed to investigate kinematic changes experienced during running-induced fatigue. Further, the study examined relations between kinematic changes and core endurance.
Repeated measures and correlation.
Seventeen novice runners participated in a running-induced fatigue protocol and underwent core endurance assessment. Participants ran at a steady state corresponding to an intensity of 13 on the Borg scale and continued until 2min after a Borg score of 17 or 90% of maximum heart rate was reached. Kinematic data were analyzed for the lower extremities and trunk throughout a running protocol and, on separate days, core endurance measures were recorded. Changes in pre- and post-fatigue running kinematics and their relations with core endurance measures were analyzed.
Analysis of peak joint angles revealed significant increases in trunk flexion (4°), decreases in trunk extension (3°), and increases in non-dominant ankle eversion (1.6°) as a result of running-induced fatigue. Post-fatigue increased trunk flexion changes displayed a strong to moderate positive relation with trunk extensor core endurance measures, in contrast to expected negative relations.
Novice runners displayed an overall increase in trunk inclination and increased ankle eversion peak angles when fatigued utilizing a running-induced fatigue protocol. As most pronounced changes were found for the trunk, trunk kinematics appear to be significantly affected during fatigued running and should not be overlooked. Core endurance measures displayed unexpected relations with running kinematics and require further investigation to determine the significance of these relations.
本研究旨在调查跑步诱导疲劳过程中经历的运动学变化。此外，该研究还考察了运动学变化与核心耐力之间的关系。
重复测量和相关性研究。
17名新手跑步者参与了跑步诱导疲劳方案，并接受了核心耐力评估。参与者以相当于Borg量表上13强度的稳定状态跑步，持续到达到Borg评分为17或最大心率的90%后2分钟。在整个跑步过程中分析下肢和躯干的运动学数据，并在不同日期记录核心耐力指标。分析疲劳前后跑步运动学的变化及其与核心耐力指标的关系。
对峰值关节角度的分析显示，由于跑步诱导疲劳，躯干前屈显著增加（4°），躯干后伸减少（3°），非优势脚踝外翻增加（1.6°）。与预期的负相关相反，疲劳后躯干前屈变化与躯干伸肌核心耐力指标呈强至中度正相关。
新手跑步者在采用跑步诱导疲劳方案疲劳时，躯干倾斜总体增加，脚踝外翻峰值角度增加。由于躯干的变化最为明显，因此在疲劳跑步过程中躯干运动学似乎受到显著影响，不应被忽视。核心耐力指标与跑步运动学之间呈现出意想不到的关系，需要进一步研究以确定这些关系的重要性。
