The effects of fatigue on decision making and shooting skill performance in water polo players

Abstract

The aim of this study was to assess the effects of fatigue on decision making and goal shooting skill in water polo. Fourteen junior elite male players (age 17.2 ± 0.5 years; mass 84.2 ± 7.6 kg; height 1.85 ± 0.05 m) completed four sets of eight repetitions of an approximately 18 s maximal water polo specific drill. Progressively declining rest ratios for each successive set of the drill were employed to induce increasing fatigue and reflect the demands of match-play. A video-based temporally occluded decision-making task (verbalized response to various tactical situations) or goal shooting skill test (qualitative and quantitative analysis of goal shooting) was performed after each set. Heart rate, rating of perceived exertion (RPE) and blood lactate concentration were recorded. Heart rate (159 ± 12, 168 ± 13, 176 ± 12, 181 ± 12 Deats min^?1; P < 0.001) and RPE (13.1 ± 2.2, 15.5 ± 1.7, 17.3 ± 1.6, 19.1 ± 1.1; P < 0.001) increased with declining rest ratios. At very high fatigue, decision-making accuracy was 18.0 ± 21.8% better than at low fatigue (P = 0.008). Shooting accuracy and velocity were unaffected by incremental fatigue; however, skill proficiency (technique) decreased by 43 ± 24% between the pre-test and high-fatigue conditions (P < 0.001). In conclusion, incremental increases in fatigue differentially influenced decision making (improved) relative to the technical performance (declined), accuracy and speed of the ball (unchanged) of a water polo goal shot.     

Home advantage and player nationality in international club football

Abstract

The home advantage effect was investigated at a team and player level in Union of European Football Associations (UEFA) Champions League football using in-depth performance and disciplinary variables. Performance analysis revealed that the home team scored more goals, had more shots on and off target, had a greater share of possession, and won more corners than the away team. There was an opposite trend for disciplinary variables, with the home team committing less fouls than the away team, and receiving less yellow and red cards. There were home advantage effects at player level for goals, total shots, shots on target, assists, and yellow cards, as found in the team analysis. In addition, foreign players demonstrated a home advantage effect for goals scored, whereas domestic players scored an equivalent number of goals at home and away venues. Results are discussed in relation to the home advantage literature and wider implications for the sport.     

Consensus statement on placebo effects in sports and exercise: The need for conceptual clarity,methodological rigour,and the elucidation of neurobiological mechanisms

In June 2017 a group of experts in anthropology, biology, kinesiology, neuroscience, physiology, and psychology convened in Canterbury, UK, to address questions relating to the placebo effect in sport and exercise. The event was supported exclusively by Quality Related (QR) funding from the Higher Education Funding Council for England (HEFCE). The funder did not influence the content or conclusions of the group. No competing interests were declared by any delegate. During the meeting and in follow-up correspondence, all delegates agreed the need to communicate the outcomes of the meeting via a brief consensus statement. The two specific aims of this statement are to encourage researchers in sport and exercise science to

1. Where possible, adopt research methods that more effectively elucidate the role of the brain in mediating the effects of treatments and interventions.

2. Where possible, adopt methods that factor for and/or quantify placebo effects that could explain a percentage of inter-individual variability in response to treatments and intervention.     

Perception-action coupling in complex game play: Exploring the quiet eye in contested basketball jump shots

The duration of the final fixation before movement initiation – a gaze strategy labelled quiet eye – has been found to explain differences in motor expertise and performance in precision tasks. To date, research only addressed this phenomenon in situations without adversarial constraints. In the present study, we compared the quiet-eye behaviour of intermediately-skilled and highly-skilled basketball players in defended vs. undefended game situations. We predicted differences in quiet-eye duration as a function of skill and performance particularly resulting from late quiet-eye offsets. Results indicated performance-enhancing effects of long quiet-eye durations in the defended but not in the undefended game situation. Furthermore, in line with our prediction, later quiet-eye offsets were associated with superior performance elucidating the phenomenon’s relevance in online-demanding motor tasks. Further, earlier quiet-eye onsets were linked to successful performance supporting earlier suggestions that it is not only the duration but also the timing that matters. These findings not only extend the positive effects of the quiet eye in motor performance to dynamic game-play situations but also support the role of the quiet eye in response to programming and information processing respectively.     

The ‘foreign’ language teacher: negotiating the culture of a school when unfamiliar with the language of instruction

This article examines and theorises the experiences of 12 primary pre-service teachers at an Australian university, undertaking a two week professional teaching experience in Bangkok. This qualitative ethnographic study of our students’ and to some extent our own experiences draws on interviews, questionnaires and observations from the students, as well as reflective notes from two participating supervisors, and sets out to account for and understand the sources of the achievements and frustrations experienced by our pre-service teachers. The findings illustrate differences between the students’ overseas experiences and Australian-based experiences. These differences include organisational structures, teacher mentoring and cultural understandings, and the effects these had on the students. In particular, we distinguish the more readily observable structural nature of the schools in which the pre-service teachers were teaching, and the less visible cultural aspects that underlie these structures. We propose ways of helping students, as part of pre-departure briefings, to become more aware of these cultural underpinnings, with a view to helping them become more at ease negotiating intercultural workplaces.     

Teaching strategy: reflections on professional practice

This paper explores how strategic management concepts, especially the notion of ‘wicked problems’, can be useful in analysing the professional practice of teachers in higher education. The keeping of a dialogical journal with a colleague helped illuminate that strategic management and education have much in common. Both are situated in unstable, unpredictable environments where contradictory demands and conditions exist. The keeping of the journal points to some of the difficulties in self-reflection illustrating the need for a more refined understanding and definition of reflective practice in education. The paper does not attempt to promote an agenda for efficient teaching, or suggests what teachers should do. However, clearly distinguishing between educational problems and technical or managerial problems will serve the educational interests of teachers, students and institutions.     

Creating opportunities for untethered learning

ABSTRACT

This article discusses the use of mobile devices by teachers in two Australian schools. It builds on a theoretical framework which considers the location of mobile learning with respect to time and space. The research used a qualitative methodology in which observations, interviews and document analysis were conducted. The study found that the physical and virtual spaces that were used were different from those used in other lessons. Mobile learning facilitated autonomous learning by students, collaboration with their peers and engagement in topics of interest to them. The study found that students and teachers adopted new roles when using the devices, and were untethered from their conventional learning spaces of the classroom. Learning changed in nature and was aligned with contemporary practices in education.     

Bring your own device – a snapshot of two Australian primary schools

Background: The use of 1:1 and Bring Your Own Device strategies in schools is in its infancy and little is known about how mobile devices such as tablets are being used to support educational practice.

Purpose: In this article, two suburban primary schools in Sydney, Australia were focused on with an aim to understand how mobile device strategies were developed and implemented and how the devices were being used in the schools.

Design and method: This qualitative study uses a case study method. It draws upon questionnaires, interviews and classroom observations, and builds upon previous research in English and Australian schools.

Findings: Results of the research indicate that the devices have only recently been incorporated into the school and suggest that their usage has been generally embraced by both school staff and parents. Key issues highlighted by these two schools included the importance of the school’s vision and uncertainty about the differences between models of provision. Participant responses also referenced some positive impacts on classroom practice, which amplify constructivist pedagogy: there were examples of device use extending student learning by supporting peer assessment, collaboration, research skills and projects.     

Assessing schematic knowledge of introductory probability theory

The ability to identify schematic knowledge is an important goal for both assessment and instruction. In the current paper, schematic knowledge of statistical probability theory is explored from the declarative-procedural framework using multiple methods of assessment. A sample of 90 undergraduate introductory statistics students was required to classify 10 pairs of probability problems as similar or different; to identify whether 15 problems contained sufficient, irrelevant, or missing information (text-edit); and to solve 10 additional problems. The complexity of the schema on which the problems were based was also manipulated. Detailed analyses compared text-editing and solution accuracy as a function of text-editing category and schema complexity. Results showed that text-editing tends to be easier than solution and differentially sensitive to schema complexity. While text-editing and classification were correlated with solution, only text-editing problems with missing information uniquely predicted success. In light of previous research these results suggest that text-editing is suitable for supplementing the assessment of schematic knowledge in development.