排序方式： 共有111条查询结果，搜索用时 15 毫秒
41.
Heidi Orloff Bryce Sumida Janna Chow Lalae Habibi Aaron Fujino Brian Kramer 《Sports biomechanics / International Society of Biomechanics in Sports》2013,12(2):238-247
The players' ability to achieve the greatest distance in kicking is determined by their efficiency in transferring kinetic energy from the body to the ball. The purpose of this study was to compare the kinetics and kinematics of the plant leg position between male and female collegiate soccer players during instep kicking. Twenty-three soccer players (11 males and 12 females) were filmed in both the sagittal and posterior views while performing a maximal instep kick. Plant leg kinetic data were also collected using an AMTI 1000 force platform. There were no significant differences between the sexes in plant leg position, but females had significantly greater trunk lean, plant leg angle, and medial-lateral ground reaction force than the males. Males showed higher vertical ground reaction forces at ball contact, but there were no significant differences in ball speed at take-off between the sexes. Ball speed at take-off was inversely related to peak anterior–posterior ground reaction force ( ? 0.65). The anatomical differences between the sexes were reflected in greater trunk lean and lower leg angle in the females. 相似文献
42.
James C. A. Peacock Kevin Ball 《Sports biomechanics / International Society of Biomechanics in Sports》2013,12(6):608-621
In football, kicking with high ball velocity can increase scoring opportunities and reduce the likelihood of interception. Efficient energy transfer from foot to ball during impact is important to attain a high ball velocity. It is considered impact efficiency can be increased by reducing the change in ankle plantarflexion during foot–ball impact. However, conflicting evidence exists, questioning its effectiveness as a coaching cue. The aim of the present study was to systematically analyse joint stiffness, foot velocity and impact location with a mechanical kicking machine to determine if change in ankle plantarflexion during foot–ball impact and ball velocity are influenced. Sagittal plane data of the shank, foot and ball were measured using high-speed video (4,000 Hz). Increasing joint stiffness reduced change in ankle plantarflexion and increased ball velocity from a greater effective mass. Increasing foot velocity increased change in ankle plantarflexion and increased ball velocity. Distal impact locations increased change in ankle plantarflexion and reduced ball velocity as coefficient of restitution decreased. These results identify that change in ankle plantarflexion is a dependent variable during foot–ball impact and does not directly influence ball velocity. Coaches can assess ankle motion during impact to provide feedback to athletes on their impact efficiency. 相似文献
43.
通过对毽球运动起源和发展现状的了解,以及对毽球运动的健身、社会、教育功能的分析,在对安徽省普通高校学生和专家进行问卷调查的基础上,提出了在安徽省普通高校开设毽球课的设想,并提出建议。 相似文献
44.
杨睿 《洛阳师范学院学报》2012,31(8):110-112
毽球作为一项民族传统体育运动项目进入校园,将会使学校的体育教学更加充实,内容更加丰富多彩,形式更加多样化.有助于更广泛的青年喜爱并热衷于传统体育运动,并通过它了解和热爱中华传统文化. 相似文献
45.
短道速度滑冰技术动作分析 总被引：9，自引：0，他引：9
对运动员的比赛动作进行了运动生物力学分析 ,得知在弯道弧顶 7m长的距离内 ,在高速滑跑的情况下 ,所有运动员都没有完整的单步 ,多数运动员以右单支撑进入该区域 ,以双支撑离开该区域。从身体姿势看 ,蹲屈姿势低 ,上体姿势高。所有运动员都以较低的上体姿势进入弧顶段而以较高姿势离开。身体倾角和蹬冰角越小 ,滑速越快。从弯道弧顶段的平均速度来看 ,女运动员 5 0 0 m的平均速度比 10 0 0 m要快 ,单支撑蹬冰阶段的平均速度比双支撑蹬冰阶段快 ,单支撑阶段的纵向蹬冰是弯道增速的主要动力来源。双支撑阶段的侧蹬冰仍是提高弯道速度的重要手段。双支撑阶段浮腿着冰较早 ,而蹬冰腿迟迟不进行侧蹬冰是导致速度下降的主要原因 相似文献
46.
《European Journal of Sport Science》2013,13(8):799-805
AbstractAchieving a high ball velocity is important during soccer shooting, as it gives the goalkeeper less time to react, thus improving a player's chance of scoring. This study aimed to identify important technical aspects of kicking linked to the generation of ball velocity using regression analyses. Maximal instep kicks were obtained from 22 academy-level soccer players using a 10-camera motion capture system sampling at 500 Hz. Three-dimensional kinematics of the lower extremity segments were obtained. Regression analysis was used to identify the kinematic parameters associated with the development of ball velocity. A single biomechanical parameter; knee extension velocity of the kicking limb at ball contact Adjusted R2 = 0.39, p ≤ 0.01 was obtained as a significant predictor of ball-velocity. This study suggests that sagittal plane knee extension velocity is the strongest contributor to ball velocity and potentially overall kicking performance. It is conceivable therefore that players may benefit from exposure to coaching and strength techniques geared towards the improvement of knee extension angular velocity as highlighted in this study. 相似文献
47.
毽球是我国民族传统健身项目之一,有着悠久的历史文化和群众基础。1995年国家颁布实施了《全民健身计划纲要》,号召全国人民"加强身体素质锻炼"。在高职院校的体育教学课堂中,因地制宜地开展民族传统体育项目,不仅可以丰富体育教学内容,为我国高等体育教育改革增添活力,还可以弘扬民族传统文化,为全民健身计划奠定基础。目前毽球项目已走进广东省部分高职院校的体育课堂,但发展不容乐观。作为一种民间传统项目,毽球项目的推广方式与其它体育运动也不尽相同。 相似文献
48.
Alexandra Atack Grant Trewartha Neil E. Bezodis 《Sports biomechanics / International Society of Biomechanics in Sports》2019,18(5):457-469
The appropriate determination of performance outcome is critical when appraising a performer’s technique. Previous studies of rugby place kicking technique have typically assessed performance based on ball velocity, but this is not the sole requirement. Therefore, a mathematical model of rugby place kick ball flight was developed to yield a single measure more representative of true performance. The model, which requires only initial ball flight kinematics, was calibrated and validated using empirical place kick data, and found to predict ball position with a mean error of 4.0% after 22 m of ball flight. The model was then applied to the performances of 33 place kickers. The predicted maximum distance, a single performance measure which accounted for initial ball velocity magnitude and direction, and spin, was determined using the model and was compared against ball velocity magnitude. A moderate association in the rank-order of the kicks between these two measures (ρ = 0.52) revealed that the relative success of the kicks would be assessed differently with each measure. The developed model provides a representative measure of place kick performance that is understandable for coaches, and can be used to predict changes in performance outcome under different ball launch or environmental conditions. 相似文献
49.
毽球作为一种民族传统体育项目,是一项对性别、年龄、场地、器材条件要求较低,技术难度较小,运动强度不大,并且具有健身性、观赏性、趣味性和广泛适应性的大众健身体育项目,深受大学生的喜爱,在高等院校体育教育中大力普及推广毽球运动,会受到广大同学们的重视。毽球运动的发展促进社会的稳定、促进人的身心健康,更有效的促进学校的发展,对更好地推进全民健身计划的实施起到举足轻重的意义。文章通过对大学生毽球运动开展情况进行研究分析,并且对其在全民健身活动开展中存在的问题和发展对策提出自己的建议。 相似文献
50.
Dominik Hölbling Emanuel Preuschl Michaela Hassmann Arnold Baca 《Journal of sports sciences》2017,35(4):317-324
The double side kick is a frequently used technique in pointfighting on which most offensive kicking techniques are based on. The aim of the study was to identify parameters, e.g., trunk and leg positions, durations and velocities that affect successful technique execution.
44 fighters, male and female, including European and World champions, participated in the research. The participants performed double side kicks to a punching bag with the target at chest level. 10 international experts scored (1–10 points; interrater correlation ICC (3,1): 0.952) videos of the best individual trial for quality of technique execution. Based on the average of the scores participants were categorised into 2 equally sized groups. For kinematic data acquisition, a Vicon 3D-motion capturing system was used. The normalised knee height of the kick leg (KHK), normalised absolute distance to the frontal shoulder (DKS) at the end of both chambering phases, the horizontal velocity during both chambering phases (KEV), the durations of all 6 functional phases and total duration, were analysed.
KHK1, KHK2, DKS1 and DKS2, total duration as well as 4 out of 6 phase durations and KEV1 showed significant differences between groups in two-sided t-test or Mann–Whitney U-test for not normally distributed variables. 相似文献