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Gareth Turner Barry W Fudge Jamie S M Pringle Neil S Maxwell Alan J Richardson 《Journal of sports sciences》2019,37(2):163-172
This study sought to establish perceptions of elite endurance athletes on the role and worth of altitude training. Elite British endurance runners were surveyed to identify the altitude and hypoxic training methods utilised, along with reasons for use, and any situational, cultural and behaviour factors influencing these. Prior to the 2012 Olympics Games, 39 athletes and 20 support staff (coaches/practitioners) completed an internet-based survey to establish differences between current practices and the accepted “best-practice”. Almost all of the athletes (98%) and support staff (95%) surveyed had utilised altitude and hypoxic training, or had advised it to athletes. 75% of athletes believed altitude and hypoxia to be a “very important” factor in their training regime, with 50% of support staff believing the same. Athletes and support staff were in agreement of the methods of altitude training utilised (i.e. 'hypoxic dose’ and strategy), with camps lasting 3–4 weeks at 1,500–2,500 m being the most popular. Athletes and support staff are utilising altitude and hypoxic training methods in a manner agreeing with research-based suggestions. The survey identified a number of specific challenges and priorities, which could provide scope to optimise future altitude training methods for endurance performance in these elite groups. 相似文献
175.
Craig M. Whitworth-Turner Rocco Di Michele Ian Muir Warren Gregson Barry Drust 《European Journal of Sport Science》2019,19(5):576-584
The current study examined how sleep may be influenced by the scheduling of training and match load within 10 youth-soccer players. Sleep was measured over a 14-day in-season period using a commercially available wireless sleep monitor. Each collected sleep variable; lights out, sleep latency, total sleep time wake after sleep onset and final awakening, was compared for the specific day within the training schedule (e.g. match day [MD], day after match [MD?+?1]) and to training/match load (high-speed distance (>5.5 m/s) [HSD] and rating of perceived exertion. The data were analysed using mixed models and effect sizes, to describe the magnitude of effects that training schedule and training load may have on sleep. A reduction of sleep duration was observed on the day after the match (MD?+?1) in relation to the training days preceding the match (MD-2: ?65 min, ES: 0.89?±?0.79; MD-1 ?61 min, ES: 0.82?±?0.64) and reduction on match day (+45 min; ES: 1.91?±?1.69). This may suggest youth-soccer players actively change their sleep scheduling behaviours in relation to the imposed soccer schedule. Increased high-speed running (for every 100 m) showed a small increase to total sleep time (+9 min; ES: 0.48?±?0.31). This may suggest that increases in training load may be associated with small increases in sleep quantity. Such observations may highlight that the type of day and the associated load within the training microcycle may have important consequences for sleep within youth-soccer players. 相似文献
176.
Joe P. Warne Barry P Smyth John O’C Fagan Michelle E. Hone Chris Richter Alan M. Nevill 《Journal of sports sciences》2017,35(15):1538-1546
An evaluation of a six-week Combined minimal footwear transition and gait-retraining combination vs. gait retraining only on impact characteristics and leg stiffness. Twenty-four trained male runners were randomly assigned to either (1) Minimalist footwear transition Combined with gait-retraining over a six-week period (“Combined” group; n = 12) examined in both footwear, or (2) a gait-retraining group only with no minimalist footwear exposure (“Control”; n = 12). Participants were assessed for loading rate, impact peak, vertical, knee and ankle stiffness, and foot-strike using 3D and kinetic analysis. Loading rate was significantly higher in the Combined group in minimal shoes in pre-tests compared to a Control (P ≤ 0.001), reduced significantly in the Combined group over time (P ≤ 0.001), and was not different to the Control group in post-tests (P = 0.16). The impact peak (P = 0.056) and ankle stiffness reduced in both groups (P = 0.006). Loading rate and vertical stiffness was higher in minimalist footwear than conventional running shoes both pre (P ≤ 0.001) and post (P = 0.046) the intervention. There has a higher tendency to non-rearfoot strike in both interventions, but more acute changes in the minimalist footwear. A Combined intervention can potentially reduce impact variables. However, higher loading rate initially in minimalist footwear may increase the risk of injury in this condition. 相似文献
177.
Paulo Barreira Mark A. Robinson Barry Drust Niels Nedergaard Raja Mohammed Firhad Raja Azidin Jos Vanrenterghem 《Journal of sports sciences》2017,35(17):1674-1681
The aim of the present study was to examine reliability and construct convergent validity of Player Load? (PL) from trunk-mounted accelerometry, expressed as a cumulative measure and an intensity measure (PL · min–1). Fifteen male participants twice performed an overground football match simulation that included four different multidirectional football actions (jog, side cut, stride and sprint) whilst wearing a trunk-mounted accelerometer inbuilt in a global positioning system unit. Results showed a moderate-to-high reliability as indicated by the intra-class correlation coefficient (0.806–0.949) and limits of agreement. Convergent validity analysis showed considerable between-participant variation (coefficient of variation range 14.5–24.5%), which was not explained from participant demographics despite a negative association with body height for the stride task. Between-task variations generally showed a moderate correlation between ranking of participants for PL (0.593–0.764) and PL · min–1 (0.282–0.736). It was concluded that monitoring PL® in football multidirectional actions presents moderate-to-high reliability, that between-participant variability most likely relies on the individual’s locomotive skills and not their anthropometrics, and that the intensity of a task expressed by PL · min–1 is largely related to the running velocity of the task. 相似文献
178.
Dart Barry Burnett Paul Boulton-Lewis Gillian Campbell Jenny Smith David McCrindle Andrea 《Learning Environments Research》1999,2(2):137-156
Four hundred and eighty-four students from two metropolitan secondary schools completed the Learning Process Questionnaire,
the Individualised Classroom Environment Questionnaire and the Learner Self Concept scale. Relationships between perceptions
of the classroom learning environment, approaches to learning and self concept as a learner were investigated. Gender and
level of schooling (junior high versus senior high) differences were examined. Results showed Deep Approaches to learning
were significantly related to classroom learning environments which were perceived to be highly personalised and to be encouraging
active participation in the learning process and the use of investigative skills in learning activities. High learner self
concept was positively associated with Deep Approaches to learning and with classrooms perceived as high in Personalisation.
It was negatively associated with Surface Approaches to learning. Differences in perceptions of learning environments and
approaches to learning in relation to gender and level of schooling were small. The implications of these findings are discussed
and strategies for facilitating Deep Approaches to learning are referred to.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
179.
经济合作与发展组织视野中的韩国教育 总被引:2,自引:0,他引:2
Barry McGaw 《教育发展研究》2005,25(10):24-28
韩国举世瞩目的教育成就
韩国对教育非常重视.这可以从个人和社会的选择看出来.其中一个颇具代表性的例子是韩国人对接受正规教育的偏好. 相似文献
180.
The purpose of this study was to investigate associations between students' perceptions of their biology teachers' interpersonal behavior and their laboratory learning environments and their attitudinal, achievement, and performance outcomes. A sample of 489 students from 28 senior biology classes in eight schools in Tasmania, Australia completed the Questionnaire on Teacher Interaction (QTI) and the Science Laboratory Environment Inventory (SLEI). Responses to two attitude questionnaires, achievement on an external written examination, and performance in laboratory practical tests were used as student outcome measures. Statistical analyses supported the reliability and validity of the QTI and the SLEI when used with senior secondary biology students. We investigated associations between students' perceptions of teacher behavior and their laboratory learning environment with student outcomes, including the unique and common contributions of the QTI and SLEI to variance in student outcomes. Associations with students' perceptions of the learning environment were stronger for the attitudinal outcomes than for the cognitive or practical skills outcomes. Some commonality between the QTI and SLEI scales was found in their contributions to the variance in attitudinal outcomes, but not in their contributions to variance in cognitive and practical skill outcomes. © 1999 John Wiley & Sons, Inc. J Res Sci Teach 37: 26–43, 2000 相似文献