我国青年田径运动员不同载荷压力下的足部外形特征
- 作者:admin 来源:网络 日期:2010-5-7 0:19:34
- 【中文摘要】 本研究采用无接触式激光三维足型扫描仪对北京体育大学97名足部无疾病和损伤史的田径运动员以及清华大学60名普通青年大学生进行足部扫描,获取受试者在0体重负重(简称OBW)、单足站立1/2体重负重(简称1/2BW)、单足站立全部体重负重(简称1BW)和单足站立全部体重加20kg负重(简称IBW+20kg)四个不同载荷情况下的足部外形特征及变化。本研究设计并提取了足长、足宽、足围、足趾高、足弓高、足背高、足面长、内踝高、外踝高和足跟面积等18个指标,对青年田径运动员在四种不同载荷下的足部外形进行统计分析,得到了一套青年田径运动员在不同载荷下的足部外形特征数据,此套数据可以为我国青年田径运动员足部外形指标数据库的建立提供实验操作经验及数据支持。通过对不同载荷承重下的青年田径运动员的足部外形指标的差异分析,得到以下结论:不同载荷压力对足部外形变化有一定影响:我国青年田径运动员在不同载荷下的足部外形指标与普通青年大学生存在较大差异;我国青年田径运动员的足长、足宽、内踝高、外踝高、内侧纵弓高等指标容易因载荷的不同而产生明显变化;我国青年田径运动员的足面长、足跟宽、跖趾斜宽角、自然前翘角等指标不易受到...更多载荷变化的影响;我国青年田径运动员的内侧纵弓长、外侧纵弓长、第一跖趾高、足背高、拇趾偏角、足跟面积等指标在一定载荷范围内变化明显,但超过承重范围则不再因载荷增大而变化;不同专项的青年田径运动员的足部外形指标间存在明显差异,以投掷项目运动员的差异最为突出;足长度指标、跖趾部指标、足弓部指标、足跟部指标、足踝部指标共15项内容为代表我国青年田径运动员足部外形特征的指标体系。http://www.dxlww.net 代写论文网
【英文摘要】 The purpose of this study was to quantify the character of three-dimensional foot shape under different weight-bearing conditions. 97 youth track man in Beijing Sport University and 60 undergraduate students without histories of foot disease or injury in Isinghua University were selected in the experiment.A non-contacted foot 3-D laser scanner was used to obtained foot morphological data under four increasing loads:non-weight bearing,semi-weight bearing,full-weight bearing and full-weight-plus-20kg bearing.This research designed and captured 18 indexes,including length,width,circumference of foot, height of first metatarsophalangeal articulations,height of the arch of foot,height of instep,length of instep,height of internal malleolus, height of external malleolus,area of heel,etc.After statistics analysis of these indexes in different loading situation,foot morphological characteristics at different work loads were collected, which could provide both data and experiment practices supp..ort to the database establishment of foot morphological indexes of Chinese track man.By analyzing the foot indexes variances of athletes at different loads, some useful conclusions have been discovered.Firstly,different weight-bearing has influence on the foot shapes of youth track man. Secondly,there is marked difference on the foot shapes between youth track man and common undergraduates.Then,Sensitive and non-sensitive indexes were discovered.Length,width of foot,height of internal malleolus,height of external malleolus,height of medial longitudinal arch,etc.varied significantly with the increasing work load.For length of instep,width of heel,toe angles,no differences were identified between sets.While for some indexes,such as length of medial longitudinal arch,length of lateral longitudinal arch,height of first metatarsophalangeal articulations,there is no longer changing with increasing load after adapting to a relatively lighter load.There is marked difference on the foot shapes between different items youth track man,especially for the throwers.Finally,five dimensions of foot morphological characteristics were found to establish the foot-shape-index-system,which are respectively metatarsophalangeal index,heel index,ankle index,arch of foot index and length of foot index,including 15 items.
【中文关键词】 青年田径运动员; 足部外形; 不同载荷; 特征指标
【英文关键词】 foot shape; different weight-bearing; youth track man; characteristic indexes
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