Some Guideline Proposals for Teacher Education     

Glen Evans 《Asia Pacific Journal of Education》1985,7(2):15-24

This paper has been based closely on an address presented at the Institute of Education, Singapore, in February 1985.  相似文献   

The Way They See It: An Evaluation of the Arts Across the Curriculum Project     

Glen Coutts  Rebecca Soden  Liz Seagraves 《The International Journal of Art & Design Education》2009,28(2):194-206

This article reports on an evaluation to interrogate the efficacy of a Scottish Government sponsored initiative to introduce an arts‐infused education model to primary (elementary) and secondary (high) schools called Arts Across the Curriculum. Between April 2005 and December 2007 the evaluation team gathered data about this three‐year pilot project, using a variety of instruments including surveys, structured observations, interviews and video diaries. This article presents some of the findings from the evaluation and in particular it focuses on the artists' views of the efficacy of the project; in short we wanted to know how they ‘saw it’. It should be noted that the research team that evaluated the initiative had no say in the design of the project.  相似文献   

Effects of intensity on muscle-specific voluntary electromechanical delay and relaxation electromechanical delay     

Cory M. Smith  Terry J. Housh  Ethan C. Hill  Josh L. Keller  Glen O. Johnson  Richard J. Schmidt 《Journal of sports sciences》2018,36(11):1196-1203

The purposes of this study were to examine: 1) the potential muscle-specific differences in voluntary electromechanical delay (EMD) and relaxation electromechanical delay (R-EMD), and 2) the effects of intensity on EMD and R-EMD during step incremental isometric muscle actions from 10 to 100% maximal voluntary isometric contraction (MVIC). EMD and R-EMD measures were calculated from the simultaneous assessments of electromyography, mechanomyography, and force production from the vastus lateralis (VL), vastus medialis (VM), and rectus femoris (RF) during step isometric muscle actions. There were no differences between the VL, VM, and RF for the voluntary EMD_E-M (onsets of the electromyographic to mechanomyographic signals), EMD_M-F (onsets the mechanomyographic to force production), or EMD_E-F (onsets of the electromyographic signal to force production) as well as R-EMD_E-M (cessation of electromyographic to mechanomyographic signal), R-EMD_M-F (cessation of mechanomyographic signal to force cessation), or R-EMD_E-F (cessation of electromyorgraphic signal to force cessation) at any intensity. There were decreases in all EMD and R-EMD measures with increases in intensity. The relative contributions from EMD_E-M and EMD_M-F to EMD_E-F as well as R-EMD_E-M and R-EMD_M-F to R-EMD_E-F remained similar across all intensities. The superficial muscles of the quadriceps femoris shared similar EMD and R-EMD measurements.  相似文献   

Feasibility for the Use of a Standardized Fitness Testing Protocol Among Australian Fitness Industry Professionals     

Jason A. Bennie  Glen H. Wiesner  Ineke Vergeer  Tracy L. Kolbe-Alexander  Katrien De Cocker  Chris Alexander 《Research quarterly for exercise and sport》2018,89(3):380-385

Purpose: There is currently no standardized testing protocol for assessing clients’ fitness/health within the Australian fitness industry. This study examined the perceptions of the feasibility of using a standardized testing protocol among Australian fitness industry professionals. Method: In 2014, 1,206 registered fitness industry professionals (aged 17–69 years) completed an online survey. Perceived feasibility for using a standardized testing protocol was assessed based on responses to 6 items. Respondents were classified as having a high level of perceived feasibility if they reported all 6 items to be “definitely feasible.” A multivariate logistic regression analysis, adjusting for demographic and fitness industry-related factors (e.g., qualification/years of experience), assessed the likelihood of having a high level of perceived feasibility. Results: Overall, 25.5% (95% CI [23.1%, 28.0%]) of the sample perceived the use of a standardized testing protocol as highly feasible. Items ranked most often as “definitely feasible” were “undertaking training to use the protocol” (55%) and “conducting follow-up testing every 6 to 12 weeks” (52%). After adjustment for the effect of confounding factors, casually employed professionals (OR = 0.63; 95% CI [0.45, 0.90]) and group instructors (OR = 0.58; 95% CI [0.41, 0.82]) were less likely to perceive standardized testing protocols as highly feasible. Conclusions: Among a large sample of Australian fitness industry professionals, slightly more than a quarter perceived using a standardized testing protocol to be highly feasible. Group instructors and casual employees perceived lower feasibility. Further research should determine the barriers to implementing a standardized testing protocol across the fitness industry.  相似文献   

Body composition and hydration status changes in male and female open-water swimmers during an ultra-endurance event     

Roel Vaeyens  Aaron Coutts  Renaat M Philippaerts 《Journal of sports sciences》2013,31(10):1003-1012

Young adult soccer players often encounter difficulty progressing from youth competition to being regularly selected for high-level, open-age competition. In an attempt to increase the playing opportunities of semi-professional and amateur under-21 players in first teams, the Royal Belgian Football Association required national division teams to include at least two players younger than 21 in their match selection (under-21 rule). Over four seasons, the following variables were analysed across 2138 semi-professional and amateur soccer players aged 16?–?39 years: (1) the number of times a player was selected to be in the first team squad; (2) the number of times a player was selected to play in the starting line-up; and (3) the number of minutes played. Chi-square analysis demonstrated that second and third division teams had complied with the new selection regulations. However, two-way analysis of variance of individual player data revealed no increase in the number of playing minutes in the under-21 group. It would appear that many teams had complied with the new regulations by selecting young players as substitutes. The results highlight the difficulties that talented young soccer players experience progressing from youth to senior competition. We conclude that the rule imposed by the Royal Belgian Football Association has failed to improve the playing opportunities of young adult soccer players. Alternative strategies for increasing playing opportunities for young talented players are required.  相似文献   

Cardiac Dimensions in Elite Young Track Athletes     

Gerald D. Tharp  William G. Thorland  Glen O. Johnson  James B. Peter 《Research quarterly for exercise and sport》2013,84(2):139-143

The purpose of the study was to compare young sprint and distance runners for changes in their cardiac dimensions with increased age (10–17 years) or body surface area (1–2 m²). Echocardiographic dimensions were obtained on 73 male track athletes competing in the 1983 National Age Group Track and Field Association championships. Each group of athletes was also compared with a hypothetical normal population (matched for weight and age) generated from prediction equations derived by Henry, Gardin, & Ware (1980). The cardiac dimensions examined were: Left ventricular internal diameter, left ventricular posterior wall thickness, and interventricular septum thickness. The male distance runners (n = 38) had a significantly greater increase in left ventricular posterior wall thickness and interventricular septum thickness with increasing age or increasing body surface area compared to the sprinters (n = 35) or compared to the predicted normal population. The left ventricular internal diameter was not significantly different between the groups. These results indicate that the hearts of male distance runners are undergoing a training hypertrophy whereas the hearts of sprinters are no different than hearts in a normal population. The changes in cardiac dimensions of these young athletes run counter to the generalizations stated for adult athletes: That endurance training enlarges the left ventricular internal diameter, but does not increase the left ventricular posterior wall or interventricular septum thickness.  相似文献   

Reliability and validity of the Yo-Yo intermittent recovery test level 1 in young soccer players     

Dieter Deprez  Aaron James Coutts  Matthieu Lenoir  Job Fransen  Johan Pion  Renaat Philippaerts 《Journal of sports sciences》2013,31(10):903-910

Abstract

The present study investigated the test-retest reliability from the Yo-Yo IR1 (distance and heart rate responses), and the ability of the Yo-Yo IR1 to differentiate between elite and non-elite youth soccer players. A total of 228 youth soccer players (11–17 years) participated: 78 non-elite players to examine the test-retest reliability within 1 week, added with 150 elite players to investigate the construct validity. The main finding was that the distance covered was adequately reproducible in the youngest age groups (U13 and U15) and highly reproducible in the oldest age group (U17). Also, the physiological responses were highly reproducible in all age groups. Moreover, the Yo-Yo IR1 test had a high-discriminative ability to distinguish between elite and non-elite young soccer players. Furthermore, age-related standards for the Yo-Yo IR1 established for elite and non-elite groups in this study may be used for comparison of other young soccer players.  相似文献   

Baseball     

Rafael Escamilla  Glen Fleisig  Steven Barrentine  James Andrews  Claude Moorman III 《Sports biomechanics / International Society of Biomechanics in Sports》2013,12(2):213-228

The purpose of this study was to quantify and compare kinematic, temporal, and kinetic characteristics of American and Korean professional pitchers in order to investigate differences in pitching mechanics, performance, and injury risks among two different cultures and populations of baseball pitchers. Eleven American and eight Korean healthy professional baseball pitchers threw multiple fastball pitches off an indoor throwing mound positioned at regulation distance from home plate. A Motion Analysis three‐dimensional automatic digitizing system was used to collect 200 Hz video data from four electronically synchronized cameras. Twenty kinematic, six temporal, and 11 kinetic variables were analyzed at lead foot contact, during the arm cocking and arm acceleration phases, at ball release, and during the arm deceleration phase. A radar gun was used to quantify ball velocity. At lead foot contact, the American pitchers had significantly greater horizontal abduction of the throwing shoulder, while Korean pitchers exhibited significantly greater abduction and external rotation of the throwing shoulder. During arm cocking, the American pitchers displayed significantly greater maximum shoulder external rotation and maximum pelvis angular velocity. At the instant of ball release, the American pitchers had significantly greater forward trunk tilt and ball velocity and significantly less knee flexion, which help explain why the American pitchers had 10% greater ball velocity compared to the Korean pitchers. The American pitchers had significantly greater maximum shoulder internal rotation torque and maximum elbow varus torque during arm cocking, significantly greater elbow flexion torque during arm acceleration, and significantly greater shoulder and elbow proximal forces during arm deceleration. While greater shoulder and elbow forces and torques generated in the American pitchers helped generate greater ball velocity for the American group, these greater kinetics may predispose this group to a higher risk of shoulder and elbow injuries.  相似文献   

Kinematic and electromyographic comparisons between chin-ups and lat-pull down exercises     

Kenji Doma  Glen B. Deakin  Kevin F. Ness 《Sports biomechanics / International Society of Biomechanics in Sports》2013,12(3):302-313

The purpose of this study was to compare kinematics and muscle activity between chin-ups and lat-pull down exercises and between muscle groups during the two exercises. Normalized electromyography (EMG) of biceps brachii (BB), triceps brachii (TB), pectoralis major (PM), latissimus dorsi (LD), rectus abdominus (RA), and erector spinae (ES) and kinematics of back, shoulder, and seventh cervical vertebrae (C7) was analysed during chin-ups and lat-pull down exercises. Normalized EMG of BB and ES and kinematics of shoulder and C7 for chin-ups were greater than lat-pull down exercises during the concentric phase (p < 0.05). For the eccentric phase, RA during lat-pull down exercises was greater than chin-ups and the kinematics of C7 during chin-ups was greater than lat-pull down exercises (p < 0.05). For chin-ups, BB, LD, and ES were greater than PM during the concentric phase, whereas BB and LD were greater than TB, and LD was greater than RA during the eccentric phase (p < 0.05). For lat-pull down exercise, BB and LD were greater than PM, TB, and ES during the concentric phase, whereas LD was greater than PM, TB, and BB during the eccentric phase (p < 0.05). Subsequently, chin-ups appears to be a more functional exercise.  相似文献   

Overview of innovations in organization for learning     

Glen Heathers 《Interchange》1972,3(2-3):47-68

Five approaches to organization for learning are reviewed: student grouping practices, nongrading, individualizing instruction, departmentalization in the elementary school, and cooperative teaching. The review relates these approaches to the accomplishment of eight basic instructional aims in the cognitive and affective areas. The critical review of each type of organizational plan considers problems of design, implementation, and evaluation. The general conclusion reached is that, while several of the approaches hold considerable promise for improving instruction, there usually are serious shortcomings in program design and implementation that prevent determining their potential contributions.

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Résumé Cinq voies d'accès à l'organisation de l'instruction sont passées en revue: techniques de groupement d'élèves, non-gradation, instruction individualisante, mise en départements en école élémentaire, et enseignement co-opératif. L'étude rapporte ces approches à l'accomplissement de huit buts fondamentaux d'instruction sur les plans cognitifs et affectifs. L'examen critique de chaque type de plan d'organisation considère les problèmes de dessin, d'exécution, et d'évaluation. La conclusion générale atteinte est, bien que plusieurs approches s'annoncent très bien pour améliorer l'instruction, on trouve presque toujours de sérieux défauts dans le dessin et l'exécution des plans d'études qui empêchent de définir leur apport potentiel.

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