Effective force and economy of triathletes and cyclists     

CLÁUDIA TARRAGÔ CANDOTTI  JERRI RIBEIRO  DENISE PASCHOAL SOARES  ÁLVARO REISCHAK DE OLIVEIRA  JEFFERSON FAGUNDES LOSS  ANTÔNIO CARLOS S. GUIMARÃES 《Sports biomechanics / International Society of Biomechanics in Sports》2013,12(1):31-43

The effective force applied on the crank, the index of pedalling effectiveness, and the economy of movement at 60, 75, 90, and 105 rev/min cadences were examined in nine cyclists and eight triathletes. Tests were performed on two days. Maximal oxygen uptake was measured and the second ventilatory threshold was estimated on day 1 using a stationary bicycle. On day 2, the four different cadences were tested at about 5% below the second ventilatory threshold. A strain gauge instrumented clip-less pedal mounted on the bicycle enabled us to measure the normal and tangential forces exerted on the pedal, while the pedal and crank angles were monitored with the aid of a video system. Based on this information, the effective force and the index of pedalling effectiveness were calculated. Cyclists produced significantly more effective force and a higher index of pedalling effectiveness at 60 and 75 rev/min and were significantly more economic at all cadences than triathletes. The significant and positive correlation between effective force and economy at all cadences suggests that improvement of the effective force would reflect on economy.  相似文献   

Comment on “Talent identification and promotion programmes of Olympic athletes”     

Áine MacNamara  Dave Collins 《Journal of sports sciences》2013,31(12):1353-1356

Abstract

Waist girth is recognised as a better predictor of obesity, particularly abdominal obesity, compared to other measures. Although several protocols for waist girth exist, arm position is either ignored, or not specified in unambiguous terms. Therefore, the purpose of this study was to determine if arm position influenced anthropometric waist girth measurement. Waist girth was measured in 92 adults (19 males, 73 females) with arms relaxed, abducted, horizontal, folded across the chest (three variations) and raised vertically. Duplicate measures, in all positions, were recorded by a single International Society for the Advancement of Kinanthropometry (ISAK)-trained technician to a precision of 0.2% technical error of measurement (TEM). Arm position had a significant effect (P < 0.001) on waist girth. Male participants had greater waist girth than females (P < 0.001) and the waist girth differences across the varying arm positions exhibited a significant position-by-gender interaction (P < 0.001). The arm position-by-body mass index (BMI) category interaction was also significant (P = 0.016) with greater differences observed at higher BMI. These findings suggest caution in comparing results of different studies where arm position is not specified and indicate that the arm position corresponding to the ISAK protocol has the lowest error and is therefore recommended.  相似文献   

Developing scientists in Hispanic substance use and health disparities research through the creation of a national mentoring network     

Angela R. Bazzi  Cristina Mogro-Wilson  Nalini Junko Negi  Jennifer M. Reingle Gonzalez  Miguel Ángel Cano  Yessenia Castro 《Mentoring & Tutoring: Partnership in Learning》2017,25(2):151-165

Hispanics are disproportionately affected by substance use and related health harms yet remain underrepresented across scientific disciplines focused on researching and addressing these issues. An interdisciplinary network of scientists committed to fostering the development of social and biomedical researchers focused on Hispanic substance use and health disparities developed innovative mentoring and career development activities. We conducted a formative evaluation study using anonymous membership and conference feedback data to describe specific mentoring and career development activities developed within the national network. Successful mentoring initiatives and career development activities were infused with cultural and community values supportive of professional integration and persistence. Mentoring initially occurred within an annual national conference and was then sustained throughout the year through formal training programs and informal mentoring networks. Although rigorous evaluation is needed to determine the success of these strategies in fostering long-term career development among scientists conducting Hispanic health and substance use research, this innovative model may hold promise for other groups committed to promoting career development and professional integration and persistence for minority (and non-minority) scientists committed to addressing health disparities.  相似文献   

Curricular change and educational quality / Cambio de plan y calidad educativa     

Adán Robles-Fernández  Javier Suárez-Álvarez  Ignacio Blanco-Saldaña  Eduardo García-Cueto 《Cultura y Educación》2017,29(1):97-119

There is no doubt that the teaching change generated by the adaptation of the former study programme to the EHEA has led to significant shifts regarding teaching loads and the organization of subjects. This paper assesses the students’ perception of the subject, the teacher and the teaching organization according to the study programme followed. For this purpose, 226 students have been assessed who have all received teaching in the same subject, with the same teacher and with the same contents, with the only variant being their study plan. An instrument developed ad hoc was applied, which comprises 18 items and assesses the students’ perceptions of the content and the perceived organization of the teaching. On the one hand, the results show the instrument to be an adequate scale that assesses teaching and organizational aspects linked to study plans in a valid and reliable way. On the other hand, it reveals that students following the new plan show more negative perceptions of organizational quality and aspects related to learning content. Moreover, these students’ marks tend to be lower compared to those achieved by students following the former plan.  相似文献   

Reception learning and self-discovery learning in histology: Students' perceptions and their implications for assessing the effectiveness of different learning modalities     

Campos-Sánchez A  Martín-Piedra MÁ  Carriel V  González-Andrades M  Garzón I  Sánchez-Quevedo MC  Alaminos M 《Anatomical sciences education》2012,5(5):273-280

Two questionnaires were used to investigate students' perceptions of their motivation to opt for reception learning (RL) or self‐discovery learning (SDL) in histology and their choices of complementary learning strategies (CLS). The results demonstrated that the motivation to attend RL sessions was higher than the motivation to attend SDL to gain new knowledge (P < 0.01) and to apply this acquired knowledge to diagnosis (P < 0.01), therapy (P < 0.01), and research (P < 0.05). Students also showed a stronger preference for RL based on motivations related to leadership (P < 0.01) and competition (P < 0.01), although the rates were very low in both cases (≤ 1.9 ± 1.1). Statistically significant differences were found between male and female students for leadership (higher in males), responsibility (higher in females), and acquiring new knowledge (higher in females only in RL). This study's findings for students' preferred CLS strategies suggested a greater need for additional complementary resources after RL than after SDL (P < 0.01). In conclusion, RL was associated with a greater need for complementary training resources such as textbooks, atlases, the internet, audiovisual media, and tutorials, whereas SDL was associated with a greater need to orient teaching and training toward medical practice. These results suggest the need to reorient both types of learning processes to enhance their effectiveness in teaching histology, especially in the case of SDL, which should place more emphasis on clinically oriented knowledge. Anat Sci Educ. © 2012 American Association of Anatomists.  相似文献   

Near-peer teaching in an anatomy course with a low faculty-to-student ratio     

Durán CE  Bahena EN  Rodríguez Mde L  Baca GJ  Uresti AS  Elizondo-Omaña RE  López SG 《Anatomical sciences education》2012,5(3):171-176

Near-peer teaching is an educational format which utilizes tutors who are more advanced in a curriculum's content to supervise students' activities and to act as instructors in laboratory settings. This format is often used in anatomy laboratory courses. The goal of the present study is to describe the design and implementation of near-peer teaching in an anatomy course and to evaluate students' perceptions of the program. A total of 700 students were registered for this anatomy course which employed near-peer instructors. Of enrolled students, 558 (79.7%) agreed to participate in this study. In general, the practical section (e.g., the clinical hour, image-based anatomy session, and gross anatomy laboratory) of the course was viewed more favorably compared to the theory section (54.8%, n = 306), with dissection and prosection in the laboratory rated as the most valued experiences (34.9%, n = 195). Near-peer teaching is a viable option that satisfies the demands of modern curricula using small groups. This format stimulates learning within courses that have large numbers of students and low faculty-to-student ratios.  相似文献   

Applying the EFQM model to golf course management     

Mª Ángeles Iglesias Madrigal  José Ángel Sanz Lara 《Journal of Sport Tourism》2017,21(3):223-241

The European Foundation for Quality Management (EFQM) Excellence Model provides guidance and support for business organisations to improve their quality management. This goal is attained by examining the relations among the several criteria that are defined and included in the model – the Enablers and the Results – albeit without going deeply into their empirical correlations. Our research focuses on the sport industry and, more particularly, on golf-related services and facilities. We analyse their management and performance. The goal is to conduct an empirical study of golf courses making up the supply in a Spanish inland region. On the basis of data and assessments contributed by the participating sample – and by resorting to multivariate statistical analysis – we pinpoint the influence of all Enablers identified by the EFQM Model, as well as their impact on the Results criteria. Correlations designed and empirically quantified make it possible for us to confirm the theoretical interrelations that the EFQM Model proposes between the defined criteria. The structural model thus obtained allows us to design a map that plots the relationships across the several criteria defined by the EFQM Model, one which portrays present-day approaches to management put into practice by the golf courses under scrutiny.  相似文献   

New concepts in reassessing mining heritage: A study and its implications from the Ancient Iron Mine of Llumeres (North Spain)     

José Paulino Fernández Álvarez  A. García-Lengomín Pieiga  C.J. Suárez-Lázare 《Journal of Cultural Heritage》2010,11(2):172-179

The possibility of giving a continuing value to an abandoned historic mine is not only of academic interest but can be a crucial economic and heritage issue for regions with long mining traditions but which are now severely affected by mine closures. This article suggests a different perspective on the rationale for studying, preserving and developing our mining heritage as an educational facility. To illustrate the case, the ancient iron mine of Llumeres, in the Asturias region, in North Spain, is presented as an example. A key point of our thesis is that a closed mine is not a ‘dead entity’ but simply in transition to another useful state and that after the closure, another organism arises, with very different appearance and vital signs. We suggest that this new organism be recognised for its high patrimonial value and that this heritage value be preserved. Accepting this point of view would mean an increase in efforts to identify and appropriately manage these vital signs. We propose that the particular mining-related aspects (which are usually viewed as negative, such as subsidence or groundwater modification), be considered as part of the heritage of the mining activity, considered in the widest sense. To facilitate understanding, these are discussed in comparison to those for a prehistoric cave, for which there is a broader experience and solid knowledge and recognition of heritage value. We have also analyzed the importance of recognising the geometric and functional relationships between the underground workings and the superficial signatures, in defining an extended patrimonial entity, which has been recently presented to the cultural and political authorities. For the case of the iron mine of Llumeres, we explain the methodology required to analyze and classify the documents in order to investigate and reconstruct the 3D geometric structure of the mine and how this can be integrated into a Geographical Information System (GIS) to improve management and editing of the information. Additionally, the historic mining technological methods employed in the underground workings of Llumeres have been studied and all the information integrated into a 3D visualization package and made available as a free 3D video sample of the subsurface information. In summary, this work represents a major step forward in improving our knowledge of the ancient iron mine of Llumeres and, as a consequence, it has been possible, for the first time, to consider the underground mining heritage in the framework of the better known (but as yet unrecognised) overground heritage. This new patrimonial entity offers enhanced possibilities for acceptance and recognition in a societal context and to aid that acceptance, we propose a radical conceptual change of perspective, pointing out new elements requiring research.  相似文献   

Playing with cowboys,outlaws, and spacefarers: The remediated American Frontier in video games     

Juan F. Belmonte-Ávila 《Journal of American culture (Malden, Mass. : 2003)》2023,46(3):242-251

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