期刊名称：Ovidius University Annals, Series Physical Education and Sport/Science, Movement and Health
印刷版ISSN：1224-7359
出版年度：2013
卷号：13
期号：2
页码：274-279
语种：English
出版社：Ovidius University Press
摘要：The Aim Of The Research.The present study aimed to create an experimental model that uses high frequency mechanical vibration to quantify the decline of performance,without running 42195m (distance of marathon race),and clarify the alterations in kinematics parameters in marathon runners.The hypothesis is that these vibrations will produce an alteration on the running gait.For this reason we studied the kinematics of the footstep in marathon runners before and after a session of 10’ mechanical whole body vibration (WBV).Methods.Fifteen male marathon runners performed on a treadmill at Iso-Efficiency Speed,with and without WBV (10 min at 50Hz – 2 mm.with a 1’:1’ work to relief ratio).A digital camera Hi-Speed (210 Hz) for motion recording was used to perform video analysis and heart rate was measured.The follow parameters were analysed: step length (SL),flight time (FT),step frequency (SF),contact time (CT),heart rate (HR) and the internal work (WINT).Results.Two-way analysis of variance (ANOVA) revealed that: SL decreased ~4% (p < 0.0001) and SF increased ~4% (p < 0,0001).FT decreased ~7,2% (p < 0,001) whereas CT remained constant.This effect occurred during the first minute: SL decreased ~3,5% (p < 0,001) and SF increased ~3,3% (p < 0,001),while during the second minute SL decreased ~1,2% (p = 0,017);SF increased ~1.1% (p < 0,02).From the third minute onwards,there was a return to the pre-vibration condition.The WINT increased by ~4% (p < 0,0001) and there was an effect on the HR of ~1.5% (p < 0,0001).Conclusions.This study have proposed an experimental approach for determining the alteration which occurs due to WBV not only on cyclic neuromuscular patterns but also on the running kinematics of marathon runners,where these variations have an effect on the internal work and heart rate.Despite the potential benefits of vibration training,it is essential that the implications of this type of treatment needs to be acquired prior to its use in sport setting.Ten minutes of WBV was able to produce a similar alteration of the running kinematics as well as marathon race,and the exact mechanisms remain to be elucidated.
关键词：Whole Body Vibration;Running Gait;Iso-Efficiency Speed;Internal Work;Motor Control.
