Reaction time and muscle activation patterns in elite and novice athletes performing a taekwondo kick

ABSTRACT

Fractionated reaction time can be used to determine distinct epochs known as pre-motor, response and movement times (MTs) of a reaction time task. The purpose of this study was to compare elite and novice athletes performing a taekwondo kick in terms of the fractionated reaction time and electromyography (EMG) activation patterns of the muscles of the striking lower limb and the lower back. We hypothesised that the pre-motor time, response time (RT) and MT would be the shorter for elite athletes compared to novices. We collected data on 13 elite and 10 novice athletes when performing a roundhouse kick. The experiment included EMG electrodes placed on five low back and lower extremity muscles and an electrogoniometer placed on the kicking knee. We found that pre-motor time was shorter and the RT was longer for elite athletes than novice athletes. Moreover, the integrated EMG of the main knee extensor does not differ between groups though other leg and trunk muscles do. The results allow coaches and teachers to understand this particular taekwondo kicking movement which could ultimately improve the technique in order to establish training and teaching goals.     

Connecting the dots: Theorizing and mapping learning entanglement through archaeology and design

Designing for digitally enhanced learning has increased in complexity. In response, this paper calls for a reconceptualization of technology—as the reconfiguring of space, place, materials, time and social relations—enrolled and refashioned in emergent learning activity. Such reconceptualization requires analytical tools, methods and processes to map heterogeneous assemblages of people, tools and tasks. Educational researchers and designers are in need of approaches and theories that move beyond deterministic accounts about the utility of individual learning technologies, to connect theory, research and practice. Our research shows that in learning to distinguish between elements that are open to alteration through design and those that are not, educational designers gain deeper insights into the flows of matter, information and humans characteristic of productive networked learning environments. And this, in turn, gives rise to valued qualities of emergent learning activity in alignment with current theories about learning. In this paper, we present a series of methods adapted from archaeology and design, illustrating their power in tracing the complex webs of dependence characteristic of productive learning entanglement, with the aim of supporting future design for learning.     

The point of view of firms in Minas Gerais about the contribution of universities and research institutes to R&D activities

The purpose of this paper is to analyze the interactions between firms, universities and research institutes based in Minas Gerais, Brazil. The theoretical standpoint is the innovation system of developing countries. Multivariate cluster analysis is used, more specifically, the Grade of Membership method, to group firms with similar characteristics and evaluate their pattern of interaction with universities and research institutes. The main results show that the highest rates of interaction are found among firms that manufacture chemical products, cellulose, paper and paper products, followed by those engaged in the extraction of metallic and non-metallic minerals.     

Students' perceptions of Blackboard and Moodle in a Portuguese university

The use of learning management systems (LMS) has grown considerably in universities around the world. The University of Minho (UM) has pioneered in this area in Portugal, adopting Blackboard as its official LMS. Moodle is also used in UM in scattered initiatives, allowing for interesting comparisons. Previous studies comparing Blackboard and Moodle have been confined to limited samples and focused on students' perceptions only. In this paper, we also try to relate those perceptions to the impact of the LMSs on student level of engagement. We assess the extent and depth of use of the two LMSs, presenting the results of a study of students' perceptions and experience with both Blackboard and Moodle. Unlike previous studies, more students (46.5%) stated a preference for Blackboard over Moodle, while 34.7% preferred Moodle, and nearly 20% had no preference. Factors that might explain these results are explored in some detail. By and large, a basic utilisation is made of both platforms, as little more than electronic document repositories, in what Francis and Raftery, in 2005, designate as a Mode 1 level of engagement. We could, however, detect some instances of a more sophisticated Mode 2 utilisation, particularly with Moodle, underlining the role of faculty in integrating a sophisticated use of LMSs when designing their courses.     

Cultural Competence Development,Critical Service Learning,and Latino/a Youth Empowerment: A Qualitative Case Study

As universities create service-learning programs, educators are experimenting with pedagogical approaches that enhance learning outcomes while benefiting communities. We present a qualitative case study of a radio-based, service-learning program, grounded in a Freirean foundation and aimed at developing the cultural competence and sense of citizenship of undergraduate students while empowering working-class high school Latino/a students. Undergraduate students benefited the most from the program; they enhanced their cultural competence skills, awareness of social issues, and sense of civic responsibility. Latino/a high school students who stayed in the program for at least a year developed self-confidence, self-esteem, and a sense of self-efficacy.     

Seeing education with one's own eyes and through PISA lenses: considerations of the reception of PISA in European countries

The paper addresses the Organization for Economic Cooperation and Development's Program for International Student Assessment (PISA) as a public policy instrument, whose worldwide circulation is mediated by processes of reinterpretation, negotiation, and re-contextualization, where national, local, and international agencies intertwine. It is focused on the active reception of PISA in six European spaces (Francophone Belgium, France, Hungary, Portugal, Romania, and Scotland) along its first three cycles. The paper identifies two contrasting developments: the Program's divergent uses and its attractiveness in different social worlds. The paper gives particular attention to what is called the ‘update of reference societies’ in the context of national receptions of PISA. These ‘updates’ are analyzed as part of a composite process that involves domestic reasons, either related to current agendas for education or to deep historical factors, and injunctions related to PISA's rationale and PISA objects.     

Effect of hand paddles and parachute on butterfly coordination

This study investigated the effects of hand paddles, parachute and hand paddles plus parachute on the inter-limb coordination of butterfly swimming. Thirteen male swimmers were evaluated in four random maximal intensity conditions: without equipment, with hand paddles, with parachute and with hand paddles + parachute. Arm and leg stroke phases were identified by 2D video analysis to calculate the total time gap (T1: time between hands’ entry in the water and high break-even point of the first undulation; T2: time between the beginning of the hand’s backward movement and low break-even point of the first undulation; T3: time between the hand’s arrival in a vertical plane to the shoulders and high break-even point of the second undulation; T4: time between the hand’s release from the water and low break-even point of the second undulation). The swimming velocity was reduced and T1, T2 and T3 increased in parachute and hand paddles + parachute. No changes were observed in T4. Total time gap decreased in parachute and hand paddles + parachute. It is concluded that hand paddles do not influence the arm-to-leg coordination in butterfly, while parachute and hand paddles + parachute do change it, providing a greater propulsive continuity.     

Designing Learning Outcomes in Design Higher Education Curricula

New and flexible educational paradigms, based on creative, innovative and open‐minded competences, are required in the development of curricula in design, working as an essential skill toolkit for future designers, particularly in higher education. This study aims to explore how learning outcomes, usually expressed by the knowledge, skills, abilities, attitudes and competences expected to be achieved by students as a result of an educational experience, are defined and formulated in design study programmes in Portugal. The investigation relies on the linguistic analysis of a corpus composed of a collection of learning outcomes extracted from the Portuguese undergraduate and post‐graduate study programmes in design. The analysis was performed through the application of natural language tools and resources to that corpus. Specifically, we used computational lexicons and grammars to gather information on word frequency, lexical density, syntactic distribution and the morphology used in texts. Additional discourse dimensions, such as the length of sentences, the frequency of specific linguistic patterns, and the presence of subjective items, like evaluative adjectives, were also considered. Results suggest that Portuguese design and art higher education institutions are committed to follow the learning outcomes recommendations, trying to identify measurable ‘design’ skills. Moreover, the results show that, despite of being confined to 1,000 characters, learning outcomes are expressed differently, both in terms of lexicon and grammar, depending on the study cycles, fostering the idea that skills and competences required become more complex as the level of qualification increases.     

Body dissatisfaction in women’s artistic gymnastics: A longitudinal study of psychosocial indicators

Body dissatisfaction is prevalent in women’s artistic gymnastics (WAG). Cross-sectional research points to social and individual risk factors, however it does not account for potential changes in body dissatisfaction during an athletic season. This study aimed to determine how gymnasts’ body dissatisfaction, risk factors for eating disorders, media internalisation, perfectionism and mood state change during pre-competition, competition and post-competition seasons and to identify how these psychosocial indicators impact on body dissatisfaction during the athletic year. The sample consisted of 20 Brazilian elite women’s artistic gymnasts aged 10–16 years. Data were obtained from a 9-month study using: Body Shape Questionnaire (BSQ); Eating Attitude Test-26; Sociocultural Attitudes Towards Appearance Questionnaire-3 (SATAQ-3); Multidimensional Perfectionism Scale (MPS); Brunel Mood Scale (BRUMS) and triceps and subscapular skinfolds. Body dissatisfaction was higher during the competition season and disordered eating, perfectionism and vigour values were higher in the pre-competition season. Disordered eating has been found as the strongest predictor of body dissatisfaction during all seasons, and mood state partly contributed to body dissatisfaction in the competitive season. Stakeholders should understand that body dissatisfaction and the prevalence of disordered eating may change over time.