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Fear of failure and perception of the motivational climate under the coach pressure 在教练压力下对失败的恐惧和对激励氛围的感知
Pub Date : 2024-01-05 DOI: 10.1177/17479541231223652
M. Gómez-López, A. Valero-Valenzuela, David Manzano-Sánchez, J. González-Hernández
The motivational climate perceived by players is a psychosocial process that has an impact on how they adjust their psychological response to performance situations with greater or lesser efficiency and balance. The aim of this study was to identify distinctive profiles of fear of failure and basic psychological needs in young handball players according to perceived motivational climate (mastery vs. performance). It examined differences in the distribution of gender and age and satisfaction of basic psychological needs and fear of failure within each profile. The study participants were 681 young (M = 16.16 years; SD = 0.92) handball players. A battery of scales adapted to Spanish was administered to measure motivational climate, fear of failure, and basic psychological needs. Central tendency, correlational, cluster, and comparative analysis (multivariate analysis) were applied to determine two profiles (Cluster 1 vs. Cluster 2). The Cluster 1 was characterized by those players with the highest values in the perception of a mastery climate, and the Cluster 2 included those players with a mixed mastery/ performance climate. The results may provide relevant information suggesting that a climate high in mastery and performance is preferable to a climate that is moderately high in both dimensions. They are useful to coaches in designing and adjusting training programs so that their athletes can enhance resources under balanced psychological efforts that reduce discomfort and flight, thus improving adaptation skills to coping with competitive demands and pressure.
球员感知到的激励氛围是一个社会心理过程,影响着他们如何调整自己的心理反应,以更高或更低的效率和平衡来应对表现情况。本研究的目的是根据所感知到的激励氛围(掌握与表现),确定青少年手球运动员对失败的恐惧和基本心理需求的不同特征。研究还考察了每个特征中性别和年龄分布的差异,以及基本心理需求和失败恐惧的满足程度。研究对象为 681 名年轻手球运动员(中位数 = 16.16 岁;标准差 = 0.92)。研究人员采用了一套根据西班牙语改编的量表来测量动机氛围、对失败的恐惧以及基本心理需求。通过中心倾向分析、相关分析、聚类分析和比较分析(多变量分析),确定了两种情况(聚类 1 与聚类 2)。群组 1 的特征是那些对掌握氛围的感知值最高的球员,而群组 2 则包括那些掌握/表现氛围混合的球员。这些结果可能提供了相关信息,表明高掌握和高表现的氛围优于这两个维度都中等偏上的氛围。这些结果有助于教练员设计和调整训练计划,使运动员能够在平衡的心理努力下增加资源,减少不适和逃避,从而提高应对竞技要求和压力的适应技能。
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引用次数: 0
Analysis of the competition programmes of elite and sub-elite swimmers: The influence of sex, stroke and race distance 分析精英和次精英游泳运动员的比赛项目:性别、划水和比赛距离的影响
Pub Date : 2023-12-19 DOI: 10.1177/17479541231217839
K. Johns, Peter M. Philipson, Cormac Powell
The purpose of this study was to analyse contemporary performance data in elite and sub-elite Irish swimmers, to explore the number of days and races required for swimmers to achieve their fastest competitive performances and how this may be influenced by sex, stroke and race distance. The initial dataset consisted of n = 3930 observations on n = 56 swimmers, with n1 = 2709 (68.9%) long course (LC) observations and n2 = 1221 (31.1%) short course (SC) observations. The main findings indicated that, firstly, the swimmers (LC & SC) produced their fastest swim in their first race of the season, approximately 39% of the time. Secondly, there were no significant differences between male and female swimmers regarding the number of days and races required to achieve their fastest performances. The final key finding identified the number of days and races between first and fastest performance was influenced by (a) stroke, for example, LC and SC freestyle and individual medley swimmers required less races and shorter timeframes to fastest swim, with breaststroke requiring the greatest number of mean days in LC and SC formats and (b) race distance, for example, across LC and SC, 400 m swimmers required fewer races (n = 1.83 & 1.64) and shorter time frame (n = 24.83 & 21.26 days) to fastest swim than other distances. These findings are valuable to coaches and practitioners, as (a) they can provide guidelines when designing competition programmes, and (b) support exploration of what a swimmer's competition may look like in terms of volume and duration to support the fastest performance.
本研究的目的是分析爱尔兰精英和次精英游泳运动员的当代成绩数据,以探索游泳运动员达到最快竞技成绩所需的天数和比赛场次,以及性别、划水方式和比赛距离对其的影响。初始数据集包括对 56 名游泳运动员的 n = 3930 次观察,其中 n1 = 2709 次(68.9%)长距离观察,n2 = 1221 次(31.1%)短距离观察。主要研究结果表明,首先,游泳运动员(长距离和短距离)在赛季第一场比赛中游出最快成绩的比例约为 39%。其次,在达到最快成绩所需的天数和比赛次数方面,男女运动员之间没有明显差异。最后一个重要发现是,第一次和最快成绩之间的天数和比赛次数受以下因素影响:(a) 泳姿,例如,低级别和高级别的自由泳和个人混合泳运动员需要较少的比赛和较短的时间才能游出最快成绩,而在低级别和高级别的比赛中,蛙泳需要的平均天数最多;(b) 比赛距离,例如,在低级别和高级别的比赛中,400 米游泳运动员需要较少的比赛(n = 1.83 和 1.64)和较短的时间(n = 24.83 和 21.26 天)才能游出最快成绩。这些发现对教练和从业人员很有价值,因为(a)它们可以为设计比赛计划提供指导,(b)支持探索游泳运动员的比赛在数量和持续时间方面的情况,以支持最快的表现。
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引用次数: 0
The influence of the field orientation on the representativeness of the positional dynamics in soccer small-sided games 场地方位对足球小型比赛中位置动态代表性的影响
Pub Date : 2023-12-12 DOI: 10.1177/17479541231217078
B.P. Couto, G. Praça, Tim J. Gabbett, Marcelo S. Luchesi, Mariana P Oliveira, Mark GL Sayers
The aim of this study was to compare the positional dynamics in soccer small-sided games (SSGs) with either greater length (SSGlength) or width (SSGwidth) with official games. Twenty four Brazilian U-20 national-level players participated in six SSGs training sessions with two different SSG configurations: SSGlength (4v4, 40 m length and 26 m width) and SSGwidth (4v4, 26 m length and 40 m width). Positional dynamics variables were monitored and compared to official games. Linear mixed regression model was fitted using the situations as fixed effect, and, when appropriate, player and/or group as random effects. When compared to SSGlength and SSGwidth, official games showed a greater Relative Team Length, LPWratio, Spacial Exploration Index (SEI), and Strech Index, with a large or very large effect size. The SSGlength elicited higher values of Relative Team Width, LPWratio, and SEI when compared to SSGwidth. No significant differences were found between SSGlength and SSGwidth for Relative Team Length (small effect size), and SI (small effect size). Both group and player as random effects showed low variances. We concluded that the tactical behaviours during the 4v4 SSG differed substantially from the competitive tactical behaviour during the official games. In addition, changing the orientation of the playing field did not make the positional dynamics of the SSGs more similar to the official games.
本研究旨在比较长度(SSGlength)或宽度(SSGwidth)更大的足球小型比赛(SSGs)与正式比赛的位置动态。24 名巴西 U-20 国家队球员参加了六次采用两种不同 SSG 配置的 SSG 训练课:SSG长度(4V4,40米长,26米宽)和SSG宽度(4V4,26米长,40米宽)。对位置动态变量进行监测,并与正式比赛进行比较。线性混合回归模型以情况作为固定效应,适当时以球员和/或组别作为随机效应。与 SSGlength 和 SSGwidth 相比,正式比赛显示出更大的相对团队长度、LPWratio、空间探索指数(SEI)和 Strech 指数,并具有较大或非常大的效应大小。与 SSGwidth 相比,SSGlength 所引起的相对团队宽度、LPWratio 和 SEI 值更高。SSGlength 和 SSGwidth 在相对团队长度(小效应量)和 SI(小效应量)方面没有发现明显差异。作为随机效应的小组和球员均显示出较低的方差。我们的结论是,4V4 SSG 中的战术行为与正式比赛中的竞技战术行为有很大不同。此外,改变比赛场地的方位并不会使 SSG 的位置动态更接近于正式比赛。
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引用次数: 0
The perceived influence of menstrual cycle and hormonal contraceptives on training and performance: Comparison between football, handball, and orienteering 月经周期和荷尔蒙避孕药对训练和成绩的影响:足球、手球和定向运动的比较
Pub Date : 2023-12-12 DOI: 10.1177/17479541231216403
L. Ekenros, Philip von Rosen, G. S. Solli, Ø. Sandbakk, Hans-Christer Holmberg, Angelica L Hirschberg, Cecilia Fridén
Recently, we published self-reported data concerning the perceived effects of the menstrual cycle and hormonal contraceptives on the training and performance of 1086 female athletes participating in 57 sports. However, studies comparing differences between sports with large sample sizes are lacking. The aim of this ancillary study was to compare the impact of the menstrual cycle and hormonal contraceptives on training and performance between the three largest sports in the cohort, that is, football, handball, and orienteering, as well as the knowledge and support provided to the female athletes engaged in these sports. The results are from a web-based questionnaire completed by 312 football players, 243 handball players, and 93 orienteers. A total of 54% of the orienteers planned their training based on the menstrual cycle, which was a higher proportion compared to football (45%) and handball (29%) players ( p < 0.05). Fewer football players believed that the menstrual cycle had an impact on their performance during training and competition compared to the two other sports. A high proportion of the athletes used hormonal contraceptives in all three sports, but a lower proportion of the orienteers (40%) used hormonal contraceptives compared to football (76%) and handball players (66%) ( p < 0.05). Football and handball players received overall more support than orienteers, and the support was mostly provided by a physiotherapist and/or a strength and conditioner coach besides the main coach. These findings demonstrate that the perceived influence of the menstrual cycle and hormonal contraceptives on training and performance differs between endurance athletes in orienteering compared to team-sport athletes in football and handball.
最近,我们公布了 1086 名参加 57 个运动项目的女运动员的自我报告数据,内容涉及月经周期和荷尔蒙避孕药对训练和成绩的影响。然而,目前还缺乏大样本量的研究来比较不同运动项目之间的差异。这项辅助研究的目的是比较月经周期和荷尔蒙避孕药对队列中三个最大运动项目(即足球、手球和定向运动)的训练和成绩的影响,以及为从事这些运动的女运动员提供的知识和支持。研究结果来自 312 名足球运动员、243 名手球运动员和 93 名定向越野运动员填写的网络问卷。54%的定向运动员根据月经周期计划训练,这一比例高于足球运动员(45%)和手球运动员(29%)(P < 0.05)。认为月经周期会影响其训练和比赛成绩的足球运动员人数少于其他两项运动。在所有三个运动项目中,使用荷尔蒙避孕药的运动员比例都很高,但与足球运动员(76%)和手球运动员(66%)相比,使用荷尔蒙避孕药的定向运动员比例较低(40%)(P < 0.05)。足球和手球运动员获得的支持总体上多于定向运动员,而提供支持的除了主要教练外,大多是理疗师和/或力量与体能教练。这些研究结果表明,与足球和手球的团队运动运动员相比,定向越野耐力运动员对月经周期和荷尔蒙避孕药对训练和成绩的影响的认识有所不同。
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引用次数: 0
A systematic review of coach augmented verbal feedback during practice and competition in team sports 对团队运动训练和比赛中教练辅助口头反馈的系统性研究
Pub Date : 2023-12-12 DOI: 10.1177/17479541231218665
Ross Corbett, M. Partington, Lisa Ryan, Ed Cope
Coaches use of augmented verbal feedback (AVF), often measured through systematic observation, is acknowledged as having a vital role in athlete learning. The purpose of this review was to identify coaches’ use of AVF, through systematic observation, in developmental and performance contexts. A literature search was conducted using EBSCO HOST and SCOPUS databases. Studies were reviewed using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. Data were extracted from 31 studies which met the inclusion criteria. Analysis revealed three themes: (a) variation in observation tool and feedback types observed; (b) evidence base surrounding feedback types observed; (c) quality of coach feedback. The multiple feedback types measured across the studies suggests there is limited agreement on the types of feedback most important to measure. For the impact of feedback to be better understood, feedback types captured via systematic observation need revising in line with research that has identified the important characteristics of feedback. A greater evidence-informed approach to the observation of feedback may help to develop a greater understanding of the feedback process in learning and performance. Where there were consistencies in feedback type, the quality of AVF delivered by coaches could be questioned.
教练员使用增强型口头反馈(AVF)通常是通过系统性观察来衡量的,这被认为在运动员的学习中起着至关重要的作用。本综述的目的是通过系统性观察,确定教练员在发展和成绩背景下对 AVF 的使用情况。我们使用 EBSCO HOST 和 SCOPUS 数据库进行了文献检索。研究采用系统综述和元分析首选报告项目(PRISMA)指南进行审查。从符合纳入标准的 31 项研究中提取了数据。分析揭示了三个主题:(a) 观察工具和观察到的反馈类型的差异;(b) 观察到的反馈类型的证据基础;(c) 教练反馈的质量。各项研究中衡量的反馈类型多种多样,这表明在衡量最重要的反馈类型方面达成的一致意见有限。为了更好地了解反馈的影响,需要根据已确定反馈重要特征的研究,对通过系统观察获得的反馈类型进行修订。以更多的证据为依据来观察反馈,可能有助于更好地理解学习和绩效中的反馈过程。在反馈类型一致的情况下,教练提供的反向志愿服务的质量可能会受到质疑。
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引用次数: 0
Aligning online and remote coaching with the digital age: Novel perspectives for an emerging field of research and practice 使在线和远程辅导与数字时代接轨:新兴研究与实践领域的新视角
Pub Date : 2023-12-06 DOI: 10.1177/17479541231217077
Blake C. Bennett, Christoph Szedlak
In the context of contemporary coaching, it is necessary to explore approaches that cater to the needs and preferences of modern learners. Given the emergence of online/remote coaching and coach development (ORC/CD) in recent years, this could involve the exploration of frameworks and onto-epistemologies that better ensure alignment with contemporary understandings of learning in the digital era. In the current article, we take the opportunity to explore some of the possible theoretical considerations that can inform future research in this emerging area; and thus support the application of technology-enhanced coaching/learning in sport coaching contexts. First, we philosophically position our arguments within a ‘new culture of learning’ (NCOL) – a framework that is congruent with online learning experiences. From there, we consider Connectivism – as an expression of New Materialism – as a suitable onto-epistemology to guide future research given its recognition of networked ways of being in the twenty-first century. We conclude by suggesting heutagogy (self-determined learning) as an appropriate signature ‘∼gogy’ for ORC/CD environments.
在当代教练的背景下,有必要探索满足现代学习者需求和偏好的方法。鉴于近年来在线/远程教练和教练发展(ORC/CD)的出现,这可能涉及对框架和本体认识论的探索,以更好地确保与数字时代对学习的当代理解保持一致。在当前的文章中,我们借此机会探讨了一些可能的理论考虑,这些考虑可以为这个新兴领域的未来研究提供信息;从而支持技术增强的教练/学习在体育教练环境中的应用。首先,我们在哲学上将我们的论点置于“新文化学习”(NCOL)中,这是一个与在线学习经验相一致的框架。由此,我们认为连接主义——作为新唯物主义的一种表达——作为一种合适的本体认识论来指导未来的研究,因为它承认了21世纪的网络存在方式。最后,我们建议将变异学(自主学习)作为ORC/CD环境的合适签名“~ gogy”。
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引用次数: 2
The role of sport coaches on student-athletes’ life skills development and transfer: Using multilevel model analysis 体育教练对学生运动员生活技能发展和迁移的作用:使用多层次模型分析
Pub Date : 2023-12-06 DOI: 10.1177/17479541231217368
Junsu Bae, Taehee Lim, David Michael O’Sullivan
A structured sport environment is known to provide adequate conditions for the development and transfer of student-athletes’ life skills. However, recent research not only emphasizes the environment but also argues that the intentional effort of coaches such as life skills coaching is important. This study examines the role of coaches’ life skills coaching on the development and transfer of athletes’ life skills using a multilevel model. A total of 28 high school athletic teams (28 coaches, 291 student-athletes) were recruited to participate in the study, using cluster sampling. The life skills coaching of Level 2 (coaches) in sports were measured using the Korean version of the Coaching Life Skills in Sport Questionnaire (CLSS-Q). The life skills of the student-athletes at Level 1 were measured using the Life Skills Scale for Student-Athletes (LSSSA) and Korean version of Life Skills Transfer Survey (LSTS). Multilevel model analysis was conducted to analyze dyadic data. The result of analysis showed that three hypotheses were supported. Specifically, life skills development of student-athletes affected life skills transfer (Hypothesis 1), life skills coaching affected student-athletes’ life skills transfer (Hypothesis 2), and the interaction effect between life skills coaching and development affected life skills transfer of student-athletes (Hypothesis 3). We conclude that coaches should use intentional life skills coaching strategies to maximize student-athlete life skills development and transfer to daily life.
一个结构化的运动环境为学生运动员的生活技能的发展和转移提供了充分的条件。然而,最近的研究不仅强调环境,而且认为教练的有意识的努力,如生活技能教练是重要的。本研究采用多层次模型考察教练员生活技能指导对运动员生活技能发展和转移的作用。采用整群抽样的方法,共招募28支高中运动队(28名教练,291名学生运动员)参与研究。采用韩国版《体育教练生活技能问卷》(CLSS-Q)对二级教练(教练员)的生活技能指导进行了测量。采用《学生运动员生活技能量表》(LSSSA)和韩国版《生活技能转移调查》(LSTS)对一级学生运动员的生活技能进行测量。采用多级模型分析方法对二元数据进行分析。分析结果表明,三个假设得到支持。具体而言,学生运动员的生活技能发展影响了学生运动员的生活技能转移(假设1),生活技能指导影响了学生运动员的生活技能转移(假设2),生活技能指导与发展之间的交互作用影响了学生运动员的生活技能转移(假设3)。我们得出结论,教练应该使用有意识的生活技能指导策略来最大限度地提高学生运动员的生活技能发展和日常生活技能转移。
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引用次数: 0
Game sides technical-tactical differences between professional male padel players 职业男子乒乓球运动员在比赛中的技术战术差异
Pub Date : 2023-12-06 DOI: 10.1177/17479541231218379
Rodrigo Ampuero, Óscar Mellado-Arbelo, J. P. Fuentes-García, E. Baiget
The main objective of this study was to analyze how professional male padel players technically-tactically behave and to whether determine if there are any differences between one game side and the other (left game side, LGS; right game side, RGS). The sample included 12.851 shots corresponding to 8 matches from the quarterfinals, semifinals, and finals of the Premier Padel circuit held in 2022 where 16 different professional right-handed padel male players participated. All matches were analyzed through systematic observation using an ad-hoc instrument. Variables such as, type of strokes, outcomes, hitting zones and switching displacements, were taken into account. Significant differences ( p < 0.05) were found on forehands, backhands, backhand volleys, forehand lobs, backhand lobs, counter wall forehand, counter-lateral wall forehand and backhand, and wall descent stroke backhand. Also, significant differences were found regarding the stroke outcomes: into play (RGS 46.4%; p < 0.05); winners (LGS 2.3%; p < 0.01). Finally, significant differences were noticed between switching displacements in which the LGS players switched considerably more times than the RGS (66.7%; p < 0.001). The reported results proved that there exist differences between both game sides regarding their strokes, stroke outcomes, and switching displacements.
本研究的主要目的是分析职业男性模式玩家在技术战术上的行为,以及是否确定游戏一方和另一方之间是否存在差异(游戏邦注:左游戏一方,LGS;右游戏面,RGS)。样本包括来自2022年16名职业右手男选手参加的Premier Padel巡回赛四分之一决赛、半决赛和决赛的8场比赛的12.851次击球。所有匹配分析通过系统观察使用特设仪器。诸如击球类型、结果、击球区域和转换位移等变量都被考虑在内。正手、反手、反手截击、正手高球、反手高球、正手反墙、反侧壁正反手、反手墙降球得分差异有统计学意义(p < 0.05)。此外,在卒中结局方面也发现了显著差异:发挥作用(RGS 46.4%;p < 0.05);赢家(LGS 2.3%;p < 0.01)。最后,LGS玩家切换位置的次数明显多于RGS玩家(66.7%;p < 0.001)。报道的结果证明,在比赛双方在击球、击球结果和转换位移方面存在差异。
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引用次数: 0
Toward a definition and classification of lost move state: Perceptions of elite trampolining coaches 失步状态的定义与分类:精英蹦床教练的认知
Pub Date : 2023-08-30 DOI: 10.1177/17479541231196472
Élise Marsollier, D. Hauw
Several severe performance blocks have been described in the sport psychology literature, in particular the lost move and the yips. Beyond the identification of the traumatic situations associated with these problems, there is a lack of understanding of the process that ultimately culminates in performance blocks. In the present study, a situated and dynamic analysis of a specific type of block in acrobatics was conducted to: (i) identify the propensities of trampolinists to develop lost move, (ii) categorize the types of moves involved, (iii) determine the circumstances of the occurrence of lost moves as typical situations, and (iv) describe the evolution of the loss and its duration. The nine national and international-level French-speaking coaches we interviewed were asked to describe the lost moves they had experienced as coaches. Prior to their interview, each coach had to answer a questionnaire in which they were asked to identify the number of lost moves they experienced. Based on our results, lost moves appeared as evolutive adaptative processes with four steps: disruption, manifestation, contamination, and final adaptation. The phenomenon appeared as observable behavioral manifestations emerging from the interaction between athletes’ dispositions and the situations in which they find themselves throughout their sporting careers. Thus, lost moves might be considered as transitional states in skill development to which an athlete’s performance can branch off. Three main levels of concrete interventions were described, including careful consideration of the athletes’ dispositions and life-course circumstances, avoiding contamination, time off, and engaging in other activities.
在运动心理学文献中已经描述了几种严重的表现障碍,特别是丢失的动作和yips。除了识别与这些问题相关的创伤性情况之外,缺乏对最终导致表现障碍的过程的理解。在本研究中,对一种特定类型的杂技拦网进行了定位和动态分析,以:(1)确定蹦床运动员发展丢失动作的倾向;(2)对所涉及的动作类型进行分类;(3)确定丢失动作发生的典型情况;(4)描述丢失动作的演变及其持续时间。我们采访的9位国家级和国际级法语教练被要求描述他们作为教练所经历的失误。在接受采访之前,每位教练都必须回答一份调查问卷,在问卷中,他们被要求确定他们经历过的失败动作的数量。根据我们的研究结果,失落的行动表现为进化适应过程,分为四个步骤:破坏,表现,污染和最终适应。这种现象是运动员的性格和他们在整个运动生涯中所处的环境之间的相互作用所产生的可观察的行为表现。因此,丢失的动作可以被认为是技术发展的过渡状态,运动员的表现可以分支。具体的干预措施主要有三个层次,包括仔细考虑运动员的性格和生命历程环境、避免污染、休息和参与其他活动。
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引用次数: 0
Between-day reliability of inertial measurement unit parameters during soccer-specific change of direction test 足球专项方向变换试验中惯性测量单元参数的日间可靠性
Pub Date : 2023-08-30 DOI: 10.1177/17479541231196733
A. Alanen, Zach Barrons, M. Jordan, R. Ferber, K. Pasanen
This study assessed the between-day reliability of change of direction (COD) biomechanics and speed in youth soccer players using inertial measurement units (IMUs) and high-speed video. A soccer-specific COD test including a 180° pivot turn was performed in both directions by 15 elite female (age: 15.3 ± 0.6 years; height 162.6 ± 5.5 cm; body mass: 56.7 ± 7.1 kg) and 22 elite male (age: 15.4 ± 0.5 years; height 169 ± 5.9 cm; body mass: 58.5 ± 8.5 kg) youth soccer players in two consecutive days. The reliability of the variables was quantified by using intra-class correlation coefficient (ICC) analysis with limits of agreement (LoA) and Bland–Altman plots. Based on the results, neither peak resultant acceleration (PRA) nor peak angular velocity (PAV) during final foot contact was sufficiently reliable for 180° pivot turn biomechanics (poor reliability, < 0.5), but the reliability of players’ running time to turn and total time was between acceptable to good (0.9>; > 0.7). However, when analyzing females and males separately, the PRA and angular velocity ICC's for females had poor to acceptable reliability, when turning left, and were statistically different from males ( Z-score > 1.96). Acceptable to good reliability with reasonable (max 15% difference) LoA implies that speed measures in different phases of COD could reliably reproduce individual differences in 180° pivot turn COD speed. Sex-related differences in repeatability of acceleration and angular velocity call for more comprehensive research in the future. PAV and PRA would not be recommended for the purpose of analyzing individual repeatability of specific steps of COD movement.
本研究利用惯性测量单元(imu)和高速视频对青少年足球运动员的方向变化(COD)生物力学和速度的日间可靠性进行了评估。我们对15名优秀女性(年龄:15.3±0.6岁;高度162.6±5.5 cm;体重:56.7±7.1 kg),精英男性22名(年龄:15.4±0.5岁;高度169±5.9 cm;体重:58.5±8.5 kg)连续两天的青少年足球运动员。采用类内相关系数(ICC)分析、一致限(LoA)和Bland-Altman图来量化变量的信度。基于这些结果,最终脚接触时的峰值合成加速度(PRA)和峰值角速度(PAV)对于180°枢轴转弯生物力学来说都不够可靠(可靠性差,;> 0.7)。然而,当分别分析女性和男性时,女性的PRA和角速度ICC's在左转时的可靠性较差,与男性有统计学差异(Z-score > 1.96)。可接受的良好可靠性与合理的(最大15%的差异)LoA意味着在COD的不同阶段的速度测量可以可靠地再现180°枢轴转弯COD速度的个体差异。加速度和角速度重复性的性别差异需要在未来进行更全面的研究。PAV和PRA不推荐用于分析COD运动特定步骤的个体重复性。
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引用次数: 0
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