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标题：Modifications in running kinematics in fatigued running, do not influence the cost of oxygen transport
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作者：Saint A. Sackey ; Saint A. Sackey ; Kurt H. Schütte 等
期刊名称：International Journal of Applied Exercise Physiology
电子版ISSN：2322-3537
出版年度：2019
卷号：8
期号：1
页码：1-9
DOI：10.30472/ijaep.v8i1.327
语种：English
出版社：Asian Exercise and Sport Science Association
摘要：Changes in oxygen cost per a given distance of running due to fatigue have often been accompanied with alterations in running kinematics. Nevertheless, it is not certain if the changes in the oxygen cost of transport are as a result of the fatigue or the modifications in the kinematics. We, therefore, sought to understand the correlations between changes in running kinematics and oxygen cost of transport in fatigued running. Thirty-two recreational (16 men, 16 women) runners underwent a fatigue protocol which involved incremental speed to volitional exhaustion on a motorized treadmill, whiles heart rate, oxygen consumption, blood lactate, and RPE were monitored. Spatio-temporal kinematic data was assessed with an Optogait photoelectric system, and GoPro Hero 4 Black camera was used to capture upper extremity kinematics for offline analysis. Changes in pre-and post-fatigue and the interactions between the changes in kinematic parameters and oxygen cost of transport were assessed. Forward trunk lean increased from 6.81 ± 2.08 ° to 7.95 ± 2.51 °, contact times also increased from 0.33 ± 0.02 to 0.34 ± 0.02 (seconds) and the oxygen cost of transport increased from 234.1 ± 20.1 to 240.8 ± 19.6 (ml.km1 .kg -1 ) at post-fatigue. A negative medium correlation (r = - 0.484; p = 0.001) was found between changes in arm swing and contact time due to fatigue. Running-induced fatigue causes changes in the spatio-temporal and upper extremity kinematics of recreational runners, however, such changes do not correlate with the increase in oxygen cost of transport in fatigued running.
关键词：forward trunk lean; arm carriage; spatio-temporal kinematics; metabolic fatigue; stride angle; cost of oxygen transport