Effects of a short-term pre-season training programme on the body composition and anaerobic performance of professional rugby union players     

Christos K. Argus  Nicholas Gill  Justin Keogh  Will G. Hopkins  C. Martyn Beaven 《Journal of sports sciences》2013,31(6):679-686

Abstract

Pre-season rugby training develops the physical requisites for competition and consists of a high volume of resistance training and anaerobic and aerobic conditioning. However, the effects of a rugby union pre-season in professional athletes are currently unknown. Therefore, the purpose of this investigation was to determine the effects of a 4-week pre-season on 33 professional rugby union players. Bench press and box squat increased moderately (13.6 kg, 90% confidence limits ±2.9 kg and 17.6 ± 8.0 kg, respectively) over the training phase. Small decreases in bench throw (70.6 ± 53.5 W), jump squat (280.1 ± 232.4 W), and fat mass (1.4 ± 0.4 kg) were observed. In addition, small increases were seen in fat-free mass (2.0 ± 0.6 kg) and flexed upper-arm girth (0.6 ± 0.2 cm), while moderate increases were observed in mid-thigh girth (1.9 ± 0.5 cm) and perception of fatigue (0.6 ± 0.4 units). Increases in strength and body composition were observed in elite rugby union players after 4 weeks of intensive pre-season training, but this may have been the result of a return to fitness levels prior to the off-season. Decreases in power may reflect high training volumes and increases in perceived of fatigue.  相似文献   

Using Skill Tests to Identify Successful and Unsuccessful Basketball Performers     

David R. Hopkins 《Research quarterly for exercise and sport》2013,84(3):381-387

The purpose of this study was to investigate the relationship of 21 selected basketball skill tests to successful basketball performance. The 21 skill test items were administered to 70 boys ranging in age from 12 to 17 attending the 1977 University of Minnesota-Duluth basketball camp for boys. Based on the ratings of three high school and three college coaches, camp participants were designated as successful (n = 32) and unsuccessful (n = 38) performers. The stepwise discriminant analysis procedure was used. Six skill tests were identified as significantly contributing to discriminating between group membership. These tests, in order of the magnitude of their standardized discriminant function coefficients, were (1) speed pass, (2) zig-zag run, (3) free jump, (4) side step, (5) front shot, and (6) zig-zag dribble. It was concluded that a basketball skill test battery comprised of these six test items would objectively measure basketball playing ability and discriminate between successful and unsuccessful performers.  相似文献   

Contrasting Two Approaches to Distance Language Learning     

Cristina Ros i Solé  Joseph Hopkins 《Distance Education》2007,28(3):351-370

In this article we contrast two distance foreign language programs developed at two European institutions of higher education (the Modern Languages Program at the Open University, UK; and the English Program at the Universitat Oberta de Catalunya, Spain) as instances of two pedagogical models used to address the many challenges posed by teaching languages at a distance. A detailed analysis of both approaches reveals that the pedagogical choices made by both universities are in great measure determined by the historical and cultural contexts in which both institutions are embedded. In addition, we discuss the similarities and differences between the two and draw several conclusions regarding the appropriateness of the two distance universities' general educational, administrative, and technological models for distance language learning.  相似文献   

Learning Essentials in an Activity Curriculum*     

L. Thomas Hopkins 《Journal of Experimental Education》2013,81(4):298-303

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Classroom conditions to secure enjoyment and achievement: the pupils' voice. Listening to the voice of Every child matters     

Elizabeth A. Hopkins 《Education 3-13》2013,41(4):393-401

This paper argues that pupil voice and the active engagement of pupils in shaping their own educational experience are integral to the success of the ‘Enjoy and Achieve’ strand of the Every child matters: Change for children programme. Through accessing the voice of Key Stage 2 pupils, insight was gained into what pupils believe to be the ideal ‘classroom conditions’ which enable them to enjoy and achieve at school. Pupil voice was accessed using an innovative form of group interview incorporating an Ishikawa or fishbone tool. The data was collected from 180 pupils, from Years 3–6 (aged 7–11) in a UK Junior school. The findings identify eight ‘classroom conditions’ which pupils see as being critical for them to be able to enjoy and achieve at school. Two of these ‘classroom conditions’ do not appear to be supported by previous research.  相似文献   

Facilitating Intercultural Communication in Parent–Teacher Conferences: Lessons From Child Translators     

Inmaculada M. García–Sánchez  Marjorie Faulstich Orellana  Megan Hopkins 《Multicultural Perspectives》2013,15(3):148-154

In this article Abraham Lincoln is considered as an alternative to the usual type of patriot's hero. He reminds us of our great historical failings. He remains a figure of controversy, a national hero in only some corners of society. He is the heroic President who serves as the first compassionate defender of the downtrodden, and he is a hero in those subcultures as well. Lincoln's treatment in the movies is discussed, focusing particularly on the recent movie Lincoln. Lincoln is seen as a match for the usual movie hero. His famous immunity to casual treatment in popular culture is discussed as well.  相似文献   

Seasonal progression and variability of repeat-effort line-drill performance in elite junior basketball players     

Montgomery PG  Pyne DB  Hopkins WG  Minahan CL 《Journal of sports sciences》2008,26(5):543-550

To determine gender differences, positional differences, and patterns of change in the performance of the basketball line-drill test, 93 male (mean age 16.8 years, s = 1.1) and 95 female (mean age 16.5 years, s = 1.0) basketball players undertook 516 line-drill tests over a 5-year period. Log-transformed performance times were analysed using a mixed model that included quadratic within-participant fixed effects for time in the season and time in the programme. Changes and differences were standardized for interpretation of magnitudes. Mean performance times were 28.0 s (s = 1.3) for males and 30.4 s (s = 1.3) for females. The mean pattern of change in performance within a season differed substantially between the sexes and playing positions: male guards and female centres showed moderate to very large improvements mid-season of 1.1% and 3.5% respectively (90% confidence limits +/-2.1% and +/-3.0%), while female guards and male forwards showed large to very large decrements of -1.6% (+/-2.6%) and -2.4% (+/-2.0%). Over 3 years, males improved performance across all three playing positions by 1.4% (+/-1.3%) and females by 2.9% (+/-1.4%). Males improved performance by 0.2% (+/-0.5%) per year, whereas the performance of females deteriorated by 0.6% (+/-0.4%) per year. The differing patterns of performance change presumably reflect variations in training and competition loads, with short-term fluctuations in performance being managed to promote longer-term improvements.  相似文献   

International: A performance analysis model in a development context     

Clive Watts  Paul Wilcox  Ian Hopkins 《Performance Improvement》1988,27(1):20-21

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Strategic planning. To obtain support for a high priority health project     

Maureen Grimmer  Patsy Whitesell  Donald R. Hopkins 《Performance Improvement》1984,23(7):12-14

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Improving energy expenditure estimates from wearable devices: A machine learning approach     

Ruairi O’Driscoll  Jake Turicchi  Mark Hopkins  Graham. W. Horgan  Graham Finlayson  James. R. Stubbs 《Journal of sports sciences》2020,38(13):1496-1505

ABSTRACT

A means of quantifying continuous, free-living energy expenditure (EE) would advance the study of bioenergetics. The aim of this study was to apply a non-linear, machine learning algorithm (random forest) to predict minute level EE for a range of activities using acceleration, physiological signals (e.g., heart rate, body temperature, galvanic skin response), and participant characteristics (e.g., sex, age, height, weight, body composition) collected from wearable devices (Fitbit charge 2, Polar H7, SenseWear Armband Mini and Actigraph GT3-x) as potential inputs. By utilising a leave-one-out cross-validation approach in 59 subjects, we investigated the predictive accuracy in sedentary, ambulatory, household, and cycling activities compared to indirect calorimetry (Vyntus CPX). Over all activities, correlations of at least r = 0.85 were achieved by the models. Root mean squared error ranged from 1 to 1.37 METs and all overall models were statistically equivalent to the criterion measure. Significantly lower error was observed for Actigraph and Sensewear models, when compared to the manufacturer provided estimates of the Sensewear Armband (p < 0.05). A high degree of accuracy in EE estimation was achieved by applying non-linear models to wearable devices which may offer a means to capture the energy cost of free-living activities.  相似文献