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：2016
卷号：16
期号：2
页码：652-658
语种：English
出版社：Ovidius University Press
摘要：Aim.The purpose of this paper is to highlight the opportunity of assessing neuromuscular control by the Cartesian motion analysis,based on the coordination component of motor ability,namely precision.Thus,we aim to check the appropriateness of computerized neuromuscular control assessment by investigating precision-related benchmarks when ultra slow motions are performed by the upper limbs at a constant speed of 10mm/s.Methods.As research methods,there were used: bibliographic study,observation,Cartesian motion analysis,statistics.In order to track the Cartesian motion,a computer platform,Kinect X Pro 1.0,was designed and programmed.The platform uses a Kinect 2.0 motion analyzer that provides the subject executing the movement with real-time feedback about the performance parameters (speed,direction,deviations in both the left and right hands).We conducted calibration and verification tests on a group of 22 subjects,of whom 2 active athletes (with national and international medals),7 athletes withdrawn from activity (5 with national and international medals) and 14 non-athletes,aged between 23 and 39 years.In addition,it was carried out a comparative testing with given algorithm between an athlete and a non-athlete,for the coordination parameters depending on the type of effort (anaerobic alactacid and lactacid) and the use or lack of visual control.Different testing frequencies (from over 5 assessments/second to less than one assessment per second) were used.Results.The first sets of tests showed a loss of homogeneous distribution in average speed per testing unit,when the testing unit duration was reduced,and an increasingly higher range in the quartile variation compared to the target.Comparative testing supported the initial observations for the two effort intervals assessed.Conclusions.Tracking the motion per very short time intervals highlights a real difficulty in maintaining a constant speed in the motor actions of upper limbs,although,apparently,it looks like a continuous,smooth motion with constant speed.The observation is most likely an outcome of the complex coordination of muscle contractions and emphasizes not a basal,but a secondary character of speed (as human motor ability) resulting from a coordinated composition of equal forces.
