2012年伦敦奥运会跆拳道击头技术在比赛中的应用及分析

文章运用录像观察法、数据统计法、文献资料法对2012年伦敦奥运会跆拳道铜牌赛和决赛的录像进行观察并详细记录相关数据,对数据进行对比分析,得出新规则的使用促进了更多新技术的产生,转身动作明显增多,腿法的空中变化性以及推踢技术使用明显增多。在跆拳道比赛中击头技术是得分的有效手段,在实战中十分重要,准确把握时机可以掌控比赛的主动权,扩大比分优势,击溃对手的心理防线,从而获得比赛的胜利。     

广州亚运会跆拳道决赛技战术统计分析

采用录像观察法、文献资料法、数理统计法、对比分析法,对广州亚运会跆拳道比赛决赛16场比赛中32名运动员使用的技术进行统计分析。统计内容包括动作使用次数、得分情况、得分率等。分析结果显示,进攻技术中是以横踢技术占据主导地位,在反击迎击技术中以前横踢占据主导地位,在比赛中进攻技术使用上高于反击迎击技术,在比赛中高位击头技术对比赛的取胜起到了至关重要的作用。     

新规则下第16届亚运会跆拳道比赛得分技术分析

为研究新规则背景下跆拳道比赛主要得分技战术的运用,分析跆拳道技术、战术发展情况,以第16届亚运会跆拳道决赛阶段的比赛为研究对象,主要采用现场观摩并录像的研究方法与北京奥运会、11届全运会跆拳道比赛得分技术情况进行对比研究。结果显示,跆拳道比赛得分技术形式多样化,个人技术得分值提高,横踢技术和踢击躯干技术使用率及得分率有所降低,击头技术得分提高,后踢、后旋踢、下劈击头技术将成为跆拳道比赛得分的主要技术。     

核心力量训练对少年跆拳道运动员后旋踢技术踢击能力的影响

随着跆拳道比赛旋转技术得分的不断提高,强化跆拳道运动员后旋踢技术的踢击能力,成为了跆拳道赛事提升运动员比赛成绩的重要手段之一。运用文献资料法、数理统计法和实验法,选用二指禅健身俱乐部30名少年跆拳道运动员为实验对象,随机分为实验组和对照组,进行为期8周的训练干预,研究核心力量训练对跆拳道后旋踢技术踢击能力的影响。     

第13届全运会女子跆拳道比赛统计分析

通过对2017年13届全运会跆拳道项目女子比赛进行录像统计,分析当下跆拳道女子运动员技术运用特征.旨在为竞技跆拳道运动的发展提供理论借鉴.结果显示:在新规则的背景下跆拳道女子运动员进攻战术运用较多,其中高位横踢、下劈技术成为比赛胜负的关键,转身动作成为中小级别击头技术的增长点,但女子大级别在高位技术和高难度动作的运用和得分率有待于提高.     

全国跆拳道锦标赛系列赛男子58公斤级击头技术运用分析

目的 分析优秀运动员在比赛中腿法击头技术,为分析当前击头技术动作规律现状、科学优化训练下肢击头技术动作,缩短与对手的差距给予重要启示.方法 录像观察法、数理统计法.结果 1)横踢、下劈踢、侧踢击头技术在进攻、迎击、反击三种常用战术中占据主导位置.2)进攻战术中横踢的使用率得分率最高,但成功率下劈踢技术最高.3)迎击战术...     

DaeDo电子护具对男子竞技跆拳道比赛技战术的影响研究

为研究DaeDo电子护具对男子竞技跆拳道比赛技战术特点的影响,以参加2012年全国跆拳道锦标赛男子58kg级共44场比赛的48名运动员为研究对象,运用文献资料、录像观察、数理统计等研究方法,对竞技跆拳道比赛男子运动员的技战术进行分析。结果显示:三个回合中,技术运用次数逐渐增加,第一回合技术运用成功率最高,第三回合技术得分最多;下劈是得分最多的技术,占技术总得分的41.0%,横踢是运用最多的技术,使用率达44.9%;击头得分占总得分的61.2%,明显高于躯干得分,下劈是击头次数和得分最多的技术;各战术运用中,直接进攻、直接反击的使用率和得分率较高,而防守反击、攻防转换的使用率和得分率偏低,有待加强。     

新规则下女子跆拳道比赛制胜得分技术应用特征分析

运用文献资料、视频分析、数理统计和对比分析等研究方法,从制胜得分技术的视角,对新规则使用下2018年和2019年的全国跆拳道锦标系列赛冠军总决赛的女子决赛视频资料进行分析。结果表明,女子跆拳道比赛应用制胜得分技术有一系列规律性特征:在正向制胜得分技术应用中,1分直拳技术使用频次明显增多,2分腿法踢击躯干技术应用次数显著回升,3分击头技术运用数量持续上升;在提高分值激励下,4分旋转技术踢击躯干制胜得分次数明显增长,5分旋转技术击头制胜得分能力有所提升;推+踢、变线、拳腿等组合技术运用能力增强;不同级别制胜得分技术应用特征有明显的差异性。     

新规则下女子跆拳道比赛制胜得分技术应用特征分析

运用文献资料、视频分析、数理统计和对比分析等研究方法,从制胜得分技术的视角,对新规则使用下2018年和2019年的全国跆拳道锦标系列赛冠军总决赛的女子决赛视频资料进行分析。结果表明,女子跆拳道比赛应用制胜得分技术有一系列规律性特征:在正向制胜得分技术应用中,1分直拳技术使用频次明显增多,2分腿法踢击躯干技术应用次数显著回升,3分击头技术运用数量持续上升;在提高分值激励下,4分旋转技术踢击躯干制胜得分次数明显增长,5分旋转技术击头制胜得分能力有所提升;推+踢、变线、拳腿等组合技术运用能力增强;不同级别制胜得分技术应用特征有明显的差异性。     

对2007年全国跆拳道冠军赛腿法技术运用的分析研究

通过对2007年全国跆拳道冠军赛159场比赛进行统计分析,结果表明：各种腿法在跆拳道比赛中的运用,横踢是核心技术,特别是后横踢是得分的主要手段,其得分率占85％以上,拳法得分依然为零,因此应加强拳法得分能力的培养;男子运动员对高难度击头腿法的得分均优于女子运动员,说明我国女子运动员对高难度击头技术的掌握不如男子运动员;在本次比赛中采用防守反击打法的运动员占多数,以稳求胜。     

Initiating running barefoot: Effects on muscle activation and impact accelerations in habitually rearfoot shod runners

Runners tend to shift from a rearfoot to a forefoot strike pattern when running barefoot. However, it is unclear how the first attempts at running barefoot affect habitually rearfoot shod runners. Due to the inconsistency of their recently adopted barefoot technique, a number of new barefoot-related running injuries are emerging among novice barefoot runners. The aim of this study was therefore to analyse the influence of three running conditions (natural barefoot [BF], barefoot with a forced rearfoot strike [BRS], and shod [SH]) on muscle activity and impact accelerations in habitually rearfoot shod runners. Twenty-two participants ran at 60% of their maximal aerobic speed while foot strike, tibial and head impact accelerations, and tibialis anterior (TA), peroneus longus (PL), gastrocnemius medialis (GM) and gastrocnemius lateralis (GL) muscle activity were registered. Only 68% of the runners adopted a non-rearfoot strike pattern during BF. Running BF led to a reduction of TA activity as well as to an increase of GL and GM activity compared to BRS and SH. Furthermore, BRS increased tibial peak acceleration, tibial magnitude and tibial acceleration rate compared to SH and BF. In conclusion, 32% of our runners showed a rearfoot strike pattern at the first attempts at running barefoot, which corresponds to a running style (BRS) that led to increased muscle activation and impact accelerations and thereby to a potentially higher risk of injury compared to running shod.     

Initial foot contact and related kinematics affect impact loading rate in running

This study assessed kinematic differences between different foot strike patterns and their relationship with peak vertical instantaneous loading rate (VILR) of the ground reaction force (GRF). Fifty-two runners ran at 3.2 m · s^?1 while we recorded GRF and lower limb kinematics and determined foot strike pattern: Typical or Atypical rearfoot strike (RFS), midfoot strike (MFS) of forefoot strike (FFS). Typical RFS had longer contact times and a lower leg stiffness than Atypical RFS and MFS. Typical RFS showed a dorsiflexed ankle (7.2 ± 3.5°) and positive foot angle (20.4 ± 4.8°) at initial contact while MFS showed a plantar flexed ankle (?10.4 ± 6.3°) and more horizontal foot (1.6 ± 3.1°). Atypical RFS showed a plantar flexed ankle (?3.1 ± 4.4°) and a small foot angle (7.0 ± 5.1°) at initial contact and had the highest VILR. For the RFS (Typical and Atypical RFS), foot angle at initial contact showed the highest correlation with VILR (r = ?0.68). The observed higher VILR in Atypical RFS could be related to both ankle and foot kinematics and global running style that indicate a limited use of known kinematic impact absorbing “strategies” such as initial ankle dorsiflexion in MFS or initial ankle plantar flexion in Typical RFS.     

对赵帅在2019年世界跆拳道锦标赛中技战术分析

目的 对赵帅在2019年世界跆拳道锦标赛中技战术运用情况进行统计分析,为其日常训练比赛提出科学合理的建议.方法 通过文献资料法、录像观察法、数理统计法等研究方法对赵帅技术特征进行分析总结.结果 与结论赵帅在比2019年世锦赛中使用率最高的是2分的横踢与推踢技术,3分和4分的旋转技术的使用率偏低但成功率较高;赵帅前腿技术...     

Foot strike patterns and hind limb joint angles during running in Hadza hunter-gatherers

BackgroundInvestigations of running gait among barefoot and populations have revealed a diversity of foot strike behaviors, with some preferentially employing a rearfoot strike (RFS) as the foot touches down while others employ a midfoot strike (MFS) or forefoot strike (FFS). Here, we report foot strike behavior and joint angles among traditional Hadza hunter-gatherers living in Northern Tanzania.MethodsHadza adults (n = 26) and juveniles (n = 14) ran at a range of speeds (adults: mean 3.4 ± 0.7 m/s, juveniles: mean 3.2 ± 0.5 m/s) over an outdoor trackway while being recorded via high-speed digital video. Foot strike type (RFS, MFS, or FFS) and hind limb segment angles at foot strike were recorded.ResultsHadza men preferentially employed MFS (86.7% of men), while Hadza women and juveniles preferentially employed RFS (90.9% and 85.7% of women and juveniles, respectively). No FFS was recorded. Speed, the presence of footwear (sandals vs. barefoot), and trial duration had no effect on foot strike type.ConclusionUnlike other habitually barefoot populations which prefer FFS while running, Hadza men preferred MFS, and Hadza women and juveniles preferred RFS. Sex and age differences in foot strike behavior among Hadza adults may reflect differences in running experience, with men learning to prefer MFS as they accumulate more running experience.     

Impact attenuation of protective boxing and taekwondo headgear

This study aimed to compare the impact attenuation performance of boxing and taekwondo headgear in terms of peak linear and rotational acceleration. To measure the impact attenuation of headgear, a standardized (American Society for Testing and Materials (ASTM) F-2397) martial arts headgear striker was used to impart impacts to a 50th Percentile Male Hybrid III Crash Test Dummy head and neck complex. Two boxing (Adidas and Greenhill) and two taekwondo (Adidas and Nike) headgear, approved by the Association Internationale de Boxe Amateur and the World Taekwondo Federation (WTF), were selected. Each of the selected headgear was fitted to the Hybrid III head and subsequently subjected to five impacts at the front and side with a maximum impact interim time of 60 seconds by the rotating striker at 8?±?0.3?m/s. Linear and rotational acceleration were recorded at 10,000?Hz. There were significant interactions of the impact location and brand on the rotational acceleration, F(3,40)?=?6.7, p?F(1,40)?=?9.07, p?F(3,40)?=?9.9, p?相似文献   

跆拳道运动抗击打能力训练方法的实验研究

为了提高高校体院跆拳道专业学生身体抗打击能力,减少不必要的损伤,提高运动成绩,树立自信心,针对以往高校体院跆拳道专业学生,只注重学习动作发展力量及灵敏素质等,而提出在上课中加重身体抗打击训练比重。试论是否可以有利于教学,促进学生学习的积极性和自信心。     

Foot strike patterns of recreational and sub-elite runners in a long-distance road race

Abstract

Although the biomechanical properties of the various types of running foot strike (rearfoot, midfoot, and forefoot) have been studied extensively in the laboratory, only a few studies have attempted to quantify the frequency of running foot strike variants among runners in competitive road races. We classified the left and right foot strike patterns of 936 distance runners, most of whom would be considered of recreational or sub-elite ability, at the 10 km point of a half-marathon/marathon road race. We classified 88.9% of runners at the 10 km point as rearfoot strikers, 3.4% as midfoot strikers, 1.8% as forefoot strikers, and 5.9% of runners exhibited discrete foot strike asymmetry. Rearfoot striking was more common among our sample of mostly recreational distance runners than has been previously reported for samples of faster runners. We also compared foot strike patterns of 286 individual marathon runners between the 10 km and 32 km race locations and observed increased frequency of rearfoot striking at 32 km. A large percentage of runners switched from midfoot and forefoot foot strikes at 10 km to rearfoot strikes at 32 km. The frequency of discrete foot strike asymmetry declined from the 10 km to the 32 km location. Among marathon runners, we found no significant relationship between foot strike patterns and race times.