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11.
Israel Halperin Dale W. Chapman Kevin G. Thompson Chris Abbiss 《Journal of sports sciences》2019,37(1):59-66
Prior research indicates that providing participants with positive augmented feedback tends to enhance motor learning and performance, whereas the opposite occurs with negative feedback. However, the majority of studies were conducted with untrained participants performing unfamiliar motor tasks and so it remains unclear if elite athletes completing familiar tasks respond in a similar fashion. Thus, this study investigated the effects of three different versions of false-performance feedback on punching force (N), pacing (force over time) and ratings of perceived exertion (RPE) in 15 elite amateur male boxers. Athletes completed a simulated boxing bout consisting of three rounds with 84 maximal effort punches delivered to a punching integrator on four separate days. Day one was a familiarisation session in which no feedback was provided. In the following three days athletes randomly received false-positive, false-negative and false-neutral feedback on their punching performance between each round. No statistical or meaningful differences were observed in punching forces, pacing or RPE between conditions (P > 0.05; ≤ 2%). These null results could stem from the elite status of the athletes involved, the focus on performance rather than learning, or they may indicate that false feedback has a less potent effect on performance than previously thought. 相似文献
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Israel Halperin Dale W. Chapman David T. Martin Chris Abbiss 《Journal of sports sciences》2017,35(5):500-507
Research indicates that instructing athlete’s to focus on bodily movements (internal focus of attention [IFA]) may hinder performance, whereas instructing them to focus on the movement outcome (external focus of attention [EFA]) often enhances performance. Despite the importance of instructions in striking combat sports, limited research has examined the influence of IFA and EFA on performance in well-trained combat athletes. This study investigated the effects of different instructional cues on punching velocity (m · s?1) and normalised impact forces (N · kg?1) among intermediate (n = 8) and expert (n = 7) competitive boxers and kickboxers. Athletes completed three rounds of 12 maximal effort punches delivered to a punching integrator on three separate days. Day one was a familiarisation session with only control instructions provided. In the following two days athletes randomly received IFA, EFA or control instructions prior to each of the three rounds. Athletes punching with EFA were 4% faster and 5% more forceful than IFA (P < 0.05), and 2% faster and 3% more forceful than control (P < 0.05). Furthermore, experts punched 11% faster and with 13% greater force compared with intermediate athletes (P < 0.05). EFA led to a positive effect on punching performance and should be favoured over IFA and control instructions. 相似文献
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Sibling incest: a study of the dynamics of 25 cases 总被引:1,自引:0,他引:1
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Georgios Andronikos Adeboye Israel Elumaro Tony Westbury Russell J. J. Martindale 《Journal of sports sciences》2016,34(12):1124-1131
Physical and psychological differences related to birthdate amongst athletes of the same selection year have been characterised as the “relative age effects” (RAEs). RAEs have been identified in a variety of sports, both at youth and adult level, and are linked with dropout of athletes and a reduction of the talent pool. This study examined the existence, mechanisms and possible solutions to RAEs using qualitative methodology. Seven experts in the field of talent identification and development were interviewed. Inductive analysis of the data showed that, while there was mixed evidence for the existence of RAEs across sports, the eradication of RAEs was attributed to controllable features of the development environment. The factors reported included the structure of “categories” used to group athletes within the sport (e.g. age, weight, size, skills), recognition and prioritisation of long-term development over “short term win focus.” Education of relevant parties (e.g. coaches, scouts, clubs) about RAEs and the nature of “talent” within a long-term context was suggested, along with careful consideration of the structure of the development environment (e.g. delayed selection, provision for late developers, focus on skills not results, use of challenge). Implications for research and practice are discussed. 相似文献
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Parochial school leaders traditionally rise from the ranks of the teaching staff into the principal position, even if unprepared. Through a unique collaborative model, an outside partner and a university developed a program for formally preparing individuals to be Jewish day school leaders. The process of creating this model resulted in a reconceptualization of school leadership. 相似文献
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Caito André Kunrath Fábio Yuzo Nakamura André Roca Antonio Tessitore Israel Teoldo Da Costa 《Journal of sports sciences》2020,38(15):1818-1828
ABSTRACT
Objectives
We examine how mental fatigue (MF) influences peripheral perception, tactical behaviour, and physical performance of soccer players during a standardized small-sided game. 相似文献20.
Israel Aguilar 《Journal of Latinos & Education》2017,16(4):359-373
This article reinforces the use of research for faculty who prepare K-12 educators and leaders for social justice. The author conceptualizes auto-ethnography as a form of professional development and maintains that faculty must first experience an internal revolution before they can expect to model it, especially in a Hispanic Serving Institution (HSI). Faculty who develop critical consciousness through auto-ethnography can facilitate the use of auto-ethnography as a form of personal/professional development with his/her pre-service leaders/educators. 相似文献