Reliability and validity of different methods of estimating the one-repetition maximum during the free-weight prone bench pull exercise

ABSTRACT

This study examined the reliability and validity of three methods of estimating the one-repetition maximum (1RM) during the free-weight prone bench pull exercise. Twenty-six men (22 rowers and four weightlifters) performed an incremental loading test until reaching their 1RM, followed by a set of repetitions-to-failure. Eighteen participants were re-tested to conduct the reliability analysis. The 1RM was estimated through the lifts-to-failure equations proposed by Lombardi and O’Connor, general load-velocity (L-V) relationships proposed by Sánchez-Medina and Loturco and the individual L-V relationships modelled using four (multiple-point method) or only two loads (two-point method). The direct method provided the highest reliability (coefficient of variation [CV] = 2.45% and intraclass correlation coefficient [ICC] = 0.97), followed by the Lombardi’s equation (CV = 3.44% and ICC = 0.94), and no meaningful differences were observed between the remaining methods (CV range = 4.95–6.89% and ICC range = 0.81–0.91). The lifts-to-failure equations overestimated the 1RM (3.43–4.08%), the general L-V relationship proposed by Sánchez-Medina underestimated the 1RM (?3.77%), and no significant differences were observed for the remaining prediction methods (?0.40–0.86%). The individual L-V relationship could be recommended as the most accurate method for predicting the 1RM during the free-weight prone bench pull exercise.     

The Impact of an Obstacle Course Sport Education Season on Students' Aerobic Fitness Levels

Abstract

The purpose of this study was to determine if factor patterns of selected sports skills were similar for two samples, a skilled sample and one consisting of a wide range of skills. Comparisons were also made with kinesiological evidence regarding the patterning of basic sports skills. Data consisting of performance scores on various sports skills were available for 166 high school girls. Out of this sample, a smaller sample was drawn consisting of 69 girls who were above average in skill. Two factor models, alpha and incomplete image analysis, were used in the analysis of this data. The factor pattern of selected sports skills performed by subjects above average in skill was similar in many respects to that of a sample which included a wide range of skill. The primary difference lay in the clustering of overarm skills which appeared in the above-average factor pattern. The overarm and push patterns of the above-average sample resembled the patterns of skill obtained through kinesiological analysis. The structure of kicking, underarm, and sidearm skills remained obscure, based on the results of factor analytic techniques.     

An investigation of a novel three-dimensional activity monitor to predict free-living energy expenditure

Abstract

The aim of this study was to assess the capability of the 3dNX? accelerometer to predict energy expenditure in two separate, free-living cohorts. Twenty-three adolescents and 14 young adults took a single dose of doubly labelled water and wore a 3dNX? activity monitor during waking hours for a 10-day period while carrying out their normal routines. Multiple linear regression with backward elimination was used to establish the strength of the associations between various indices of energy expenditure, physical activity counts, and anthropometric variables. 3dNX? output accounted for 27% and 35% of the variance in the total energy expenditure of the adolescent and young adult cohort, respectively. The explained variance increased to 78%, with a standard error of estimate of 7%, when 3dNX? output was combined with body composition variables. The 3dNX? accelerometer can be used to predict free-living daily energy expenditure with a standard error of estimate of 1.65 MJ in adolescents and 1.52 MJ in young adults. The inclusion of anthropometric variables reduces the error to approximately 1 MJ. Although it remains to cross-validate these models in other populations, early indications suggest that the 3dNX? provides a useful method of predicting energy expenditure in free-living individuals.     

Gender Scripts and the Internet: The Design and Use of Amsterdam's Digital City,by Els Rommes. Enschede,The Netherlands: Twente University Press, 2002. 304 pp. 24.00. ISBN 9-0365-1774-5

This article seeks to address how religion fits into the larger domain of Internet studies and why studies of religion within computer-mediated communication (CMC) need to be given more attention. An argument is made for the need to take religion online more seriously, not just because it is an interesting phenomenon or a popular use of the Internet, but also because religion continues to be an important part of contemporary life for many people. A summary of the growth and development of religion online is presented along with an overview of how religion has been approached and studied on the Internet. This review shows what CMC studies of religion might offer in approaching research questions related to authority, identity construction, and community online. It calls for recognition of the contribution, and possibilities that underrepresented areas within interdisciplinary research, like religion, might offer Internet studies as a whole.     

无边界高等教育及其资格认证

在全球化背景下 ,特别是世贸组织的发展 ,高等教育已越来越被视为一种国际商品和服务贸易中的出口产业。各国积极谋求开拓高等教育的国际市场 ,吸引海外学生 ,在别国开办和接管高校 ,运用信息与传播技术实施远程高等教育 ,从而出现了无边界高等教育。无边界高等教育的发展 ,在较大程度上依赖于教育质量的保障和受教育者的资格认证 ,因而有效发展国际认可的资格认证制度 ,将是无边界高等教育发展的一个重要方面     

A Prospective Study of Life Stress, Social Support, and Adaptation in Early Adolescence

This study employed a 2-year longitudinal design to examine the relation of stressful life events and social supports to psychological distress and school performance among 166 early adolescents (mean age = 13.5 years). A prospective approach was utilized to control for initial levels of adjustment when examining the relation of Time 1 stress and support variables to Time 2 psychological distress and school performance. Both stress and support variables made significant contributions to the prediction of subsequent psychological distress. Stresses, but not supports, made a significant contribution to the prediction of subsequent school performance. Evidence for reciprocal and interactive linkages was also found, including effects of psychological distress and school performance on subsequent stresses and supports, and greater adaptive impact of school-based supportive resources under conditions of heightened risk outside of school. Implications for ecological and transactional models of development relating to the targeting and efficacy of preventive efforts are discussed.     

Learning set-ups

A child reaching toddler stage is ready to learn about the basic shapes that comprise much of his/her world. With an accent on fun, here are some simple activities designed to teach children how to identify and distinguish between the shapes ... of things to come! Doris Allen is a career teacher in early childhood education. She has been a member of the Board of Directors of the Oswego Community Day Care center, and has co-authored an article on handwriting in the current edition of theBook of Knowledge. Angela Collins is currently a kindergarten teacher in an Open Education program based on the British Primary System model, and during the summers directs remedial reading programs.     

Critical Religious Education (CRE) in practice: evaluating the reception of an introductory scheme of work

Critical Religious Education (CRE) is a contemporary pedagogy of religious education developed by Andrew Wright and various colleagues over the past two decades. There has been widespread academic discourse about the pedagogy in theory but increasingly commentators have called for examples of it in practice. Over the past seven years a writing group associated with The Forum of Religious and Spiritual Education at King’s College London have been developing practical materials aimed at supporting teachers in embedding the pedagogy in practice. Of particular relevance to this paper is the development of an introductory scheme of work, aimed at year 7 students, which has been trialled in a number of schools in and around London. In 2013, focus group interviews took place in four of these schools in order to ascertain the reception that the materials had received. The data suggests a very positive response to the introductory scheme of work and the CRE approach in general, partially dispelling some criticisms levelled at it in academic discourse. The author has thus suggested that the approach and the work of the writing group need further exposure, especially in schools, at conferences and on initial teacher education programmes.     

Pathways from parental stimulation of children’s curiosity to high school science course accomplishments and science career interest and skill

Curiosity is fundamental to scientific inquiry and pursuance. Parents are important in encouraging children’s involvement in science. This longitudinal study examined pathways from parental stimulation of children’s curiosity per se to their science acquisition (SA). A latent variable of SA was indicated by the inter-related variables of high school science course accomplishments, career interest, and skill. A conceptual model investigated parental stimulation of children’s curiosity as related to SA via science intrinsic motivation and science achievement. The Fullerton Longitudinal Study provided data spanning school entry through high school (N?=?118). Parental stimulation of curiosity at age 8 years comprised exposing children to new experiences, promoting curiosity, encouraging asking questions, and taking children to a museum. Intrinsic motivation was measured at ages 9, 10, and 13 years, and achievement at ages 9, 10, and 11 years. Structural equation modelling was used for analyses. Controlling for socio-economic status, parental stimulation of curiosity bore positive and significant relations to science intrinsic motivation and achievement, which in turn related to SA. Gender neither related to stimulation of curiosity nor contributed to the model. Findings highlight the importance of parental stimulation of children’s curiosity in facilitating trajectories into science, and relevance to science education is discussed.     

Evaluating Academic Challenge Beyond the NSSE

The authors investigated student and faculty perceptions of academic challenge at their institution, based on early administrations of the National Survey of Student Engagement (NSSE). This analysis revealed that the NSSE did not fully capture many meanings of academic challenge held by these faculty and students. This study led to a proposal for the development of an internal assessment approach using a modification of the NSSE and other scale items on academic challenge and student engagement. The authors discuss several implications of this study for academic scholarship and for institutional policy concerning the assessment of academic challenge.All authors except Jim Purcell are at Georgia College and State University. Stephen L. Payne received his Ph.D. in Management from Arizona State University. He is an Associate Professor of Management and has broad research interests in areas related to ethics and education. Karynne L. M. Kleine is an Associate Professor of Middle Grades Education and has an Ed.D. from the University of Maine in science studies. Her interests are intellectual development for teacher preparation and the history and philosophy of science education. Jim Purcell received his Ed.D. from the University of Alabama, is currently the Executive Director of State System Research for the Oklahoma State Regents for Higher Education, and concentrates on issues of student retention and graduation. Ginger Rudesal Carter is an Associate Professor of Mass Communication with a Ph.D. from the University of Southern Mississippi. Her interests include research on oral history, the media, and issues relating to the student press.